Double-layer wear-resistant layer for floor milling tools

专利摘要:
The present disclosure provides a double-layer wear-resistant layer for a ground milling tool, comprising: an inner wear-resistant layer A and an outer wear-resistant layer B, the inner wear-resistant layer A having the following composition in percent by mass: 10% -25% WC powder and remaining proportions from the BNi82CrSiBFe soldering additive, and the outer wear-resistant layer B has the following composition in percent by mass: 5% -9% diamond micropowder and the remaining parts of the BNi82CrSiBFe soldering additive. The manufacturing method thereof is as follows: the paste of the inner wear-resistant layer A and the paste of the outer wear-resistant layer B are respectively made, and the paste of the inner wear-resistant layer A and the paste of the outer wear-resistant layer B are sequentially pre-applied on the cutting edge of the milling cutter arranged and dried at a temperature of 110-150 ° C for 30-60 minutes, and a vacuum soldering furnace is used, the solder-coating taking place at 1050 ° C-1080 ° C in an environment with a vacuum degree of 1x10-2 Pa and 30 minutes lasts, and then a cooling in the furnace is realized, whereby the wear-resistant layer is soldered on the surface of the base body of the milling cutter; and after removal from the furnace, the bottom milling tool undergoes a vacuum heat treatment to remove residual thermal stress inside the cutter body and sheet. In the present disclosure, the problem that a conventional milling cutter has poor wear resistance is solved by solder-coating a wear-resistant composite on the surface of the milling cutter, and therefore the service life of the milling cutter is greatly extended.
公开号:BE1026821B1
申请号:E20190095
申请日:2019-10-29
公开日:2020-11-17
发明作者:Weimin Long；Jian Qin；Sujuan Zhong；Yinyin Pei；Mingfang Wu；Kexing Song；Xiupeng Li；Jianxiu Liu
申请人:Zhengzhou Res Inst Mechanical Eng Co Ltd；
IPC主号:

专利说明:

Double-Layer Wear-Resistant Layer for Ground Milling Tool BE2019 / 0095 Technical Field The present disclosure relates to the technical field of agricultural machinery, and in particular relates to a double-layer, wear-resistant layer for a ground milling tool. Technical background With the rapid economic growth in China, the degree of all-encompassing mechanization of arable farming, planting and harvesting of crops is getting higher and higher. Cutting tools are key components of agricultural machinery that have a direct impact on the quality and efficiency of agricultural machinery; and according to data, it is shown that the failure of an arable component due to wear and tear causes losses of over billion yuan per year in China. The cutting tool of an agricultural machine has a special work item, and requirements such as comparatively high wear resistance, sharpness and corrosion resistance are made during the work process. However, the cutting edge is passivated due to abrasive wear due to sand, and corrosion due to sap and the like, and its cutting ability is deteriorated, energy consumption is increased, and work efficiency and economic efficiency are greatly reduced; Soil milling machines are one of the main soil cultivation tools in China, and the soil cultivation work needs to be completed only once; and they have operational characteristics such as good tillage quality, high performance, reduction in the number of tillages, and uniform soil-fertilizer mixture, therefore are widely applicable to soil preparation before planting in dry soil. In addition, a rotary cultivator can greatly reduce the time for cultivating and preparing the soil, and is useful for shortening man-hours and increasing labor efficiency. The main factor affecting the life of the tiller is the wear resistance of the tiller cutting edge: the wear and tear and replacement of tiller cutting edges, as the main wear part of the tiller, cause great losses every year. A worn out soil cultivating part would lead to increased draft resistance and increased fuel consumption, decrease the work efficiency and quality of work of agricultural machinery, and also increase the labor cost. In addition, the replacement of tiller blades is time-consuming and labor-intensive, which affects intensive work during the harvest season.
40 The main causes of a milling cutter failure during operation are breakage and wear, of which wear is a predominant reason.
Methods for extending the service life of tiller cutting edges, BE2019 / 0095 mainly pays attention to the studies for improving the wear resistance of cutting tools, and in recent years more and more researchers are investigating the wear resistance of tiller edges. However, during the industrialization process, there are still some drawbacks such as complicated process, easy peelable coating, environmental pollution and the like. In recent years, the speed of tiller cultivation has greatly increased with the rapid development of the agricultural machinery industry in China, for this reason, more stringent requirements are placed on the wear resistance of tiller inserts, and hence it is a problem that requires an urgent solution. to extend the life of milling cutter inserts.
Subject matter of the disclosure In order to solve the above problem, the present disclosure provides a double-layer wear-resistant layer for a ground milling tool and a method for the production thereof, wherein a wear-resistant layer produced according to this disclosure has positive properties, such as e.g.
high rigidity, corrosion resistance, impact resistance, low abrasion, high adhesive force and long service life; and the manufacturing process is also simple and the production cost is low, all of which indicate appropriateness for commercialization and application.
The present disclosure is realized by the following technical solutions: A double-layer wear-resistant layer for a floor milling tool comprises an inner wear-resistant layer A and an outer wear-resistant layer B, the inner wear-resistant layer A for producing the wear-resistant layer having the following composition in percent by mass: 10% - 25% WC powder and remaining proportions of the nickel-based soldering additive, and the outer wear-resistant layer B for producing the wear-resistant layer has the following composition in percent by mass: 5% -9% diamond micropowder and remaining proportions of the nickel-based soldering additive.
A double-layer wear-resistant layer for a ground milling tool comprises an inner wear-resistant layer A and an outer wear-resistant layer B, the inner wear-resistant layer A for producing the wear-resistant layer having the following composition in percent by mass: 10% -25% WC powder, 72% -88 % Nickel-based soldering additive and 2% -3% 40 binder, and the outer wear-resistant layer B for the production of the wear-resistant layer has the following composition in percent by mass: 5% -9% diamond micropowder, 88% -93% nickel-based soldering additive and BE2019 / 0095 2 % -3% binder.
Further, the diamond micropowders, the WC powders, and the nickel-based soldering additive are all powdery, and each have a grain size in the range of 80m-100m, 45m-58m, and 45m-58m, and the oxygen contents thereof are all less than 800 ppm, and the impurity levels thereof are all less than 0.6 wt%.
Furthermore, the nickel-based soldering additive is BNi82CrSiBFe.
A method of producing a double-layer wear-resistant layer for a floor milling tool comprises the following specific steps: Step 1: performing shot peening and sandblasting on the surface of a floor milling cutter to polish and smooth the cutting edge; Step 2: Load a mixer with 20% -50% WC powders and 47% -78% nickel-based solder additive in percent by mass, mix for 2 hours with the mass ratio of each ingredient calculated based on the total mass of the wear-resistant layer, and then remove the mixture from the blender; and preparing a paste from the two mixed powders by using a binder, the content of the binder being 2% -3%, thereby obtaining a paste for the inner wear-resistant layer A, to prepare for the following steps; Step 3: Load the mixer with 10% -18% diamond micropowders and 79% -88% nickel-based soldering additive in percent by mass, mix for 2 hours with the mass ratio of each component calculated based on the total mass of the wear-resistant layer, and then take out the mixture from the blender; and preparing a paste from the two mixed powders using a binder, the content of the binder being 2% -3%, thereby obtaining a paste for the outer wear-resistant layer B, to prepare for the following steps; Step 4: Applying the paste of the inner wear-resistant layer A produced in Step 2 evenly to both surfaces and a side surface on the cutting edge of the milling cutter, a thickness of 0.7-0.9 mm being realized under control; and then obtaining a soil milling tool with the inner wear-resistant layer A loaded after cooling and air drying in preparation for the following steps; Step 5: Applying the paste of the outer wear-resistant layer B to the soil milling tool with the inner wear-resistant layer A loaded, the thickness being 0.4-0.6 mm; and then obtaining a ground milling tool with the wear-resistant layer applied;
Step 6: Place the floor milling tool with the BE2019 / 0095 wear-resistant layer applied in a drying cabinet, the temperature in the range of 110-150 ° C being maintained for 30-60 minutes, and thus the moisture within the layer being dried; and then placing the dried ground milling tool in a vacuum brazing furnace for heating, and performing braze coating of the wear-resistant layer; Step 7: Performing a vacuum heat treatment on the solder-coated floor milling tool so that the treated floor milling tool has a stiffness of 43-47 HRC.
Furthermore, the process for vacuum solder coating in step 6 has the following process parameters, namely the solder coating takes place at 1050 ° C-1080 ° C in an environment with a vacuum degree of 1x10-Pa and takes 30 minutes, and then a cooling in the oven takes place realized.
Further, in the vacuum heat treatment in step 7, the following process is performed, wherein the quenching is performed at a temperature of 820 + 10 ° C, the temperature is maintained for 10-15 minutes, and then oil cooling is performed; and then tempering takes place at a temperature of 340 + 10 ° C, and the temperature is maintained for 25-30 minutes.
The present disclosure has the following advantageous effects: A double-layer, wear-resistant layer is applied on the basis of a conventional floor milling cutter. The material, which is made by mixing tungsten carbide with a metal, has a high hardness and high wear resistance and is applied as the first layer of wear-resistant material to the milling cutter. In addition, the diamond itself has a comparatively high hardness and wear resistance, and if a material containing diamond components is used as the second layer of wear-resistant material for the milling cutter, the wear resistance of the cutting edge of the milling cutter is significantly increased by using double-layer wear-resistant materials. During the work of the milling cutter, the wear-resistant layer is in direct contact with the ground and is therefore subject to friction and abrasion; while the base material is protected by the wear-resistant layer, and therefore the service life is extended; and the life of the milling cutter can be significantly increased with little additional cost, and not only the work efficiency of the milling cutter is increased, and the tool change time and cost, and the tiller maintenance time and cost are reduced; the base body of the milling cutter is also fully utilized and the properties of the product are changed to a certain extent, this layer being easy to manufacture, which is beneficial for marketing and use.
In summary, in the present disclosure, the problem, BE2019 / 0095, that a conventional milling cutter has poor wear resistance, is solved by soldering a double-layer wear-resistant layer on the surface of the milling cutter, 5 and the service life of the milling cutter is therefore considerably extended. DETAILED DESCRIPTION OF THE EMBODIMENTS The present disclosure is to be described in more detail below with reference to specific embodiments: A double-layer wear-resistant layer for a ground milling tool comprises an inner wear-resistant layer A and an outer wear-resistant layer B, the inner wear-resistant layer A having the following composition in percent by mass : 10% -25% WC powder and the remaining proportions of the nickel-based soldering additive, and the outer wear-resistant layer B has the following composition in percent by mass: 5% -9% diamond micropowder and the remaining proportions of the nickel-based soldering additive.
A double-layer wear-resistant layer for a ground milling tool comprises an inner wear-resistant layer A and an outer wear-resistant layer B, the inner wear-resistant layer A having the following composition in percent by mass for producing the wear-resistant layer: 10% -25% WC powder, 72% -88 % Nickel-based soldering additive and 2% -3% binder, and the outer wear-resistant layer B for producing the wear-resistant layer has the following composition in percent by mass: 5% -9% diamond micropowder, 88% -93% nickel-based soldering additive and 2% -3% Binder.
Further, the diamond micropowders, the WC powders, and the nickel-base soldering additive are all powdery, and each has a grain size in the range of 45m-58m, 45m-58m, and 45m-58m, and the oxygen contents thereof are all less than 800 ppm, the impurity levels thereof are all less than 0.6 wt%, and the nickel-based soldering additive is BNi82CrSiBFe.
A method of producing a double-layer, wear-resistant layer for a floor milling tool includes the following specific steps: Step 1: performing shot peening and sandblasting on the surface of a floor milling cutter to remove oil contamination and oxide scale and to polish and smooth the cutting edge; Step 2: Load a blender with 20% -50% WC powders and 47% -78% nickel-based solder additive in percent by mass, mix for 2 hours with the mass ratio of each ingredient calculated based on the total mass of the wear-resistant layer, and then remove the mixture from the blender; and preparing a paste from the two mixed powders using a binder, the content BE2019 / 0095 of the binder being 2% -3%, thereby obtaining a paste for the inner wear-resistant layer A to prepare for the following steps;
Step 3: Loading the blender with 10% -18% diamond micropowders and
79% -88% nickel-based filler metal by mass percentage, mixing for 2 hours with the mass ratio of each component calculated based on the total mass of the wear-resistant layer, and then removing the mixture from the mixer; and making a paste from the two mixed powders using a binder,
wherein the content of the binder is 2% -3%, thereby obtaining a paste for the outer wear-resistant layer B to prepare for the following steps;
Step 4: applying the paste of the inner wear-resistant layer A produced in step 2 evenly to both surfaces and a side surface on the cutting edge of the milling cutter, a thickness of 0.7-0.9 mm being realized under control; and then obtaining a soil milling tool with the inner wear-resistant layer A loaded after cooling and air drying in preparation for the following steps;
Step 5: Applying the paste of the outer wear-resistant layer B to the
Floor milling tool with loaded inner wear-resistant layer A, the thickness being 0.4-0.6 mm; and obtaining a ground milling tool with an applied wear-resistant layer, wherein the outer layer is a paste with added diamond micropowders, whereby the wear resistance of the ground milling tool can be further improved during the
Adhesion strength between the diamond and the steel body and the soldering additive is increased;
Step 6: Place the floor milling tool with an applied wear-resistant layer in a drying cabinet, maintaining the temperature in the range of 110-150 ° C for 30-60 minutes, and thus the
Drying moisture within the layer; and then placing the dried floor milling tool in a vacuum soldering furnace for heating, and performing solder-coating of the wear-resistant layer, the process for heating in the vacuum soldering furnace having the following process parameters, namely solder-coating at 1050 ° C-1080 ° C in an environment with a degree of vacuum of 1x10 Pa takes place and lasts 30 minutes, then a cooling is carried out in the furnace, and the tool with an applied wear-resistant layer undergoes a dry treatment before vacuum brazing in order to avoid defects such as air holes inside the produced wear-resistant layer and the like;
40 Step 7: Performing a vacuum heat treatment on the solder-coated ground milling tool in order to eliminate the internal stress of the material and to reduce the wear resistance and toughness of the
To improve the milling cutter, so that the treated steel body BE2019 / 0095 has a rigidity of 43-47 HRC, whereby the following process is carried out during the vacuum heat treatment, whereby the quenching takes place at a temperature of 820 + 10 ° C, the temperature for 10 -15 minutes is maintained and then oil cooling is performed; and then tempering takes place at a temperature of 340 + 10 ° C, and the temperature is maintained for 25-30 minutes.
Embodiment 1: A quenched 65Mn steel was selected as the base material, and the selected sample was subjected to surface treatments such as shot peening and sandblasting to remove oil contamination and oxide scale, and to polish and smooth the precoated wear-resistant layer.
A blender was loaded with 20% WC powders and 78% mass percent nickel-based solder additive for mixing for 2 hours, and the mixture was then taken out of the blender, with the mass ratio of each ingredient calculated based on the total mass of the wear-resistant layer, and a Paste was prepared from the two mixed powders using a binder, the content of the binder being 2%, thereby obtaining a paste for the inner wear-resistant layer A, to prepare for the following steps; the blender was loaded with 10% diamond micropowder and 87% nickel-base solder additive by mass for mixing for 2 hours, and the mixture was then taken out of the blender, with the mass ratio of each ingredient calculated based on the total mass of the wear-resistant layer, and it became a paste prepared from the two mixed powders using a binder, the content of the binder being 3%, thereby obtaining a paste for the outer wear-resistant layer B, to prepare for the following steps; the paste produced for the inner wear-resistant layer A was evenly applied to a surface-treated sample and a milling cutter with a specification of 6mmx25mm and 25mmx5mmx100mm, a thickness of 0.8 mm being realized under control; after cooling and air-drying, the paste of the outer wear-resistant layer B was applied to the first layer, realizing a thickness of 0.5 mm under control; and the coated sample was dried, subjected to operations such as e.g. vacuum braze-coating at a high temperature and vacuum heat treatment after brazing, and finally, a sample and a milling cutter each with an applied wear-resistant layer were obtained. 40 Embodiment 2: A quenched 65Mn steel was selected as the base material, and the selected sample was subjected to a surface treatment such as spherical
and sandblasting to remove oil contamination and oxide skin, and to polish and smooth the BE2019 / 0095 precoated wear-resistant layer.
A blender was loaded with 50% WC powders and 47% mass percent nickel-based soldering additive for mixing for 2 hours, and the mixture was then taken out of the blender, with the mass ratio of each ingredient calculated based on the total mass of the wear-resistant layer, and a Paste was prepared from the two mixed powders using a binder, the content of the binder being 3%, thereby obtaining a paste for the inner wear-resistant layer A, to prepare for the following steps; the mixer was loaded with 18% diamond micropowder and 80% nickel-base solder additive by mass for mixing for 2 hours, and the mixture was then taken out of the mixer, with the mass ratio of each ingredient calculated based on the total mass of the wear-resistant layer, and a paste became prepared from the two mixed powders using a binder, the content of the binder being 2%, thereby obtaining a paste for the outer wear-resistant layer B, to prepare for the following steps; the paste of the inner wear-resistant layer A produced was evenly applied to a surface-treated sample and a milling cutter with a specification of 6mmx25mm and 25mmx5mmx100mm, with a thickness of 0.8 mm being realized under control; after cooling and air-drying, the paste of the outer wear-resistant layer B was applied to the first layer, realizing a thickness of 0.5 mm under control; and the coated sample was dried, subjected to operations such as e.g. vacuum braze-coating at a high temperature and vacuum heat treatment after brazing, and finally a sample and a milling cutter each with an applied wear-resistant layer were obtained.
Comparative example 1:
In order to compare the base body made of steel materials available on the market, such as welded Q235 steel and quenched 65Mn steel, and the sample produced in exemplary embodiment 1 with an applied wear-resistant layer, a wear test 1 was carried out in each case:
For the steel materials of the base body, i.e. welded Q235 steel and quenched 65Mn steel, a wear test 1 was carried out each using a ZX50C milling and drilling machine with a specimen of 6mmx25mm attached to a spindle
40, an 80 # SiC sandpaper was stuck on a work table, and the sanding test under a fixed load, by reciprocating a feed shaft for one hour with the rotation of the spindle, was completed with a relative reduction in the thickness of the wear-resistant layer obtained by a theoretical calculation, BE2019 / 0095 and a quantitative analysis of the wear resistance of the wear-resistant layer was realized; The relative reduction in thickness of the steel material base body was calculated from the density and the weight reduction: the relative reduction in thickness h for the welded Q235 steel: 0.378x1000 / 7.85 = hx3.14x32, h = 1.704 mm; and the relative thickness reduction h for the 65Mn steel: 0.241x1000 / 7.85 = hx3.14x32, h = 1.086 mm; For the sample produced in embodiment 1 with a wear-resistant layer, a wear test 1 was carried out using a ZX50C milling and drilling machine, a sample with a specification of 6mmx25mm was attached to a spindle, and an 80 * SiC sandpaper on a Work table was glued. The wear test was completed under a fixed load by reciprocating a feed shaft for one hour with the rotation of the spindle, whereby a relative thickness reduction of the wear-resistant layer was obtained by a theoretical calculation, and a quantitative analysis of the wear-resistance of the wear-resistant layer was realized; According to the ratio of the diamond to BNi82CrSiBFe, the density of the wear-resistant layer was calculated to the effect that the density was 7.78 g / cm if the ratio diamond: WC: BNi82CrSiBFe is 10:90; and the relative thickness reduction of the wear-resistant layer was calculated from the density and the weight reduction as follows: the relative thickness reduction h of the wear-resistant layer composite made of diamond: 0.008x1000 / 7.78 = hx3.14x32, and h = 0.036 mm.
Table 1 shows the changes in dimensions and weights of the sample, the welded Q235 steel, and the quenched 65Mn steel, all of which have a specification of 6mmx25mm: Table 1 Changes in Weights and Dimensions in Wear Tests Wear Test With a Q235 steel 65Mn steel 1 hour wear-resistant | (welded) | (quenched) laminate test the test
Reduction 0.008 0.378 0.241 dimension / mm | Before the 24.67 25.20 23.50 test After the 24.53 23.34 22.50 test Reduction Relative thickness reduction 0.036 1.704 1.086 (calculated) / mm Comparative example 2: For comparison between the base body made of steel materials available on the market, such as welded Q235 steel and quenched 65Mn steel, and the sample produced in exemplary embodiment 1 with a wear-resistant layer, a wear test 2 was carried out in each case: For the steel materials of the base body, ie Q235 welded steel and 65Mn quenched steel, a friction test and an abrasion test 2 were each carried out using a self-made test platform, and a sample of a steel material having a specification of 25mmx5mmx100mm was attached to a rotatable shaft through a through hole at one end and then placed in an environment with mixed sand and water, a change in mass being determined by weighing before and after rotating at a speed of 200 r / min for 8 hours; For the sample with a solder-coated wear-resistant layer, a friction and abrasion test 2 was carried out using a self-made test platform and a sample with a specification of 25mmx5mmx100mm was attached to a rotatable shaft through a through hole at one end and then into an environment with mixed sand and water was placed, a change in mass being determined by weighing before and after rotation at a speed of 200 r / min for 8 hours; Table 2 shows the changes in weights of the sample, the Q235 welded steel, and the 65Mn quenched steel, all of which have a specification of 25mmx5mmx100mm: Table 2 Changes in weight of samples before and after the wear wear test With a Q235 steel 65Mn -Steel 8 hours wear-resistant | (welded) | (deterred)
| Layer composite | PFRO19 / 0096 Test the Test Comparative Example 3: A tiller blade without wear-resistant treatment was mounted directly in a tiller and carried out soil cultivation work in the arable soil, the service life of the tiller blade being tested; A whole set of a tiller blade with a solder-coated double-layer wear-resistant layer was mounted in a tiller and carried out soil cultivation work in the arable soil, testing the life of the tiller blade; From the actual soil cultivation results of the tiller blades, it is found that a tiller blade made of welded Q235 steel without a wear-resistant surface treatment is able to cultivate arable land of about 21.8667 hectares (328 mu), and a tiller blade made of quenched 65Mn steel without Wear-resistant surface treatment can cultivate 22.1333 hectares of arable land (332 mu), while a milling tool with a solder-coated wear-resistant layer composite can cultivate 97.9333 hectares of arable land (1469 mu), from which it can be concluded that the actual life of the tiller edge with a solder-coated wear-resistant layer was 4.42 to 4.48 times that of a floor milling cutter without wear-resistant treatment in the test run.
Shown and described above are only the basic principles, main features, and advantages of the present disclosure, and it will be understood by those skilled in the art that the present disclosure is not limited to the above embodiments. The foregoing embodiments and description are only illustrative of the principles of this disclosure, and various changes and modifications to this disclosure may be made without departing from the spirit and scope of this disclosure, and such changes and modifications are also within the scope of the present disclosure and the The scope of the disclosure is defined by the appended claims and their equivalents.

权利要求:
Claims (9)
[1]
1. Double-layer wear-resistant layer for a floor milling tool, characterized in that the double-layer wear-resistant layer for a floor milling tool comprises an inner wear-resistant layer A and an outer wear-resistant layer B, the inner wear-resistant layer A having the following composition in percent by mass for producing the wear-resistant layer: 10% -25% WC powder and remaining parts of the nickel-based soldering additive; and the outer wear-resistant layer B for producing the wear-resistant layer has the following composition in percent by mass: 5% -9% diamond micropowder and the remaining proportions of the nickel-based soldering additive.
[2]
2 double-layer wear-resistant layer for a ground milling tool according to claim 1, characterized in that the WC powder, the diamond micropowder, and the nickel-based soldering additive are all powdery, and each has a grain size in the range of 80-100 m, 45 m-58 m, and 45-58 m, and the oxygen contents thereof are all less than 800 ppm, and the contents of impurities thereof are all less than 0.6 wt%.
[3]
3. Double-layer wear-resistant layer for a floor milling tool according to claim 1 or 2, characterized in that the nickel-based soldering additive is BNi82CrSiBFe.
[4]
4. A method for producing a double-layer wear-resistant layer for a floor milling tool according to claim 1, characterized in that it comprises the following specific steps: Step 1: performing shot and sandblasting on the surface of a floor milling cutter in order to polish and smooth the cutting edge; Step 2: loading a blender with 20% -50% toilet powders and a nickel-based solder additive in percent by mass, mixing for 2 hours, and then removing the mixture from the blender; and making a paste of the two mixed powders using a binder, thereby obtaining a paste for the inner wear-resistant layer A, in preparation for the following steps; | Step 3: Loading the mixer with 10% -18% diamond micropowder and the nickel-based soldering additive in percent by mass, mixing for 2 hours, and then removing the mixture from the mixer; and making a paste from the two mixed powders using a binder, thereby obtaining a paste for the outer wear-resistant layer B, in preparation for the following steps;
Step 4: Applying the paste of the inner BE2019 / 0095 wear-resistant layer A produced in step 2 evenly on both surfaces and one side surface on the cutting edge of the milling cutter, a thickness of 0.7-0.9 mm being achieved under control; and then obtaining a ground milling tool with the inner wear-resistant layer A loaded after cooling and air-drying, in preparation for the following steps; Step 5: applying the paste of the outer wear-resistant layer B to the ground milling tool with the inner wear-resistant layer A loaded, the thickness being 0.4-0.6 mm; and then obtaining a ground milling tool with the wear-resistant layer applied; Step 6: placing the milling tool with the wear-resistant layer applied in a drying cabinet, the temperature in the range of 110-150 ° C. being maintained for 30-60 minutes, and thus the moisture within the layer being dried; and then placing the dried ground milling tool in a vacuum brazing furnace for heating, and performing braze coating of the wear-resistant layer; Step 7: Performing a vacuum heat treatment on the solder-coated floor milling tool so that the treated floor milling tool has a stiffness of 43-47 HRC.
[5]
5. A method for producing a double-layer wear-resistant layer for a floor milling tool according to claim 4, characterized in that the process for heating in the vacuum soldering furnace in step 6 has the following process parameters, namely the solder coating at 1050 ° C-1080 ° C in an environment with a degree of vacuum of 1x10 Pa takes place and lasts 30 minutes, and then a cooling in the furnace is carried out.
[6]
6. A method for producing a double-layer wear-resistant layer for a floor milling tool according to claim 4, characterized in that the following process is carried out during the vacuum heat treatment in step 7, the quenching taking place at a temperature of 820 + 10 ° C, the temperature for Maintained for 10-15 minutes, and then oil cooling is performed; and then tempering takes place at a temperature of 340 + 10 ° C, and the temperature is maintained for 25-30 minutes.
[7]
7. Double-layer wear-resistant layer for a floor milling tool, characterized in that the double-layer wear-resistant layer for a floor milling tool comprises an inner wear-resistant layer A and an outer wear-resistant layer B, the inner wear-resistant layer A having the following composition in percent by mass for producing the wear-resistant layer : 10% -25% WC powder, 72% -88% BE2019 / 0095 nickel-based soldering additive and 2% -3% binder, and the outer wear-resistant layer B for producing the wear-resistant layer has the following composition in percent by mass: 5% -9 % Diamond micropowder, 88% -93% nickel-based soldering additive and 2% -3% binder.
[8]
8. Double-layer wear-resistant layer for a ground milling tool according to claim 7, characterized in that the WC powder, the diamond micropowder, and the nickel-based soldering additive are all powder, and each have a grain size in the range of 80-100 m, 45 m-58 m , and 45-58 m, and the oxygen contents thereof are all less than 800 ppm, and the contents of impurities thereof are all less than 0.6 wt%.
[9]
9. Double-layer wear-resistant layer for a floor milling tool according to claim 7 or 8, characterized in that the nickel-based soldering additive is BNi82CrSiBFe.

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同族专利:

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公开号 | 公开日

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CN109706445A|2019-05-03|

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BE1026821A1|2020-06-25|

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法律状态:
2021-01-15| FG| Patent granted|Effective date: 20201117 |

优先权:

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申请号 | 申请日 | 专利标题

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CN201811526957.4A|CN109706445A|2018-12-13|2018-12-13|A kind of bilayer rotary tillage cutter wear-resistant coating|

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