• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present disclosure provides a wear-resistant layer for a tiller, which has the following composition in percent by mass: 10% diamond micropowder, 0.5% -2.0% micronano-SiC powder, 3% -5% TiH2 powder, and BNi82CrSiBFe- Solder additive of remaining portions and which is made by the following procedure, wherein the powders are weighed relatively and then completely mixed, and the mixture is prepared using a binder into a paste which is provided on a cutting edge of the tiller cutter and for 30-60 Minutes at 110-130 ° C is dried; a vacuum soldering furnace is used, and the solder coating takes place in an environment with a degree of vacuum of 6x10-3 Pa at 1050-1080 ° C and lasts 30 minutes, and the mixture is then cooled in the furnace so that the wear-resistant layer on the surface of the base body the tilling cutter is applied and at the same time a flexible ceramic phase Ti3SiC2 is produced by in-situ synthesis, so that the wear resistance of the tool is increased and adverse influences of poor impact resistance of a brittle ceramic relative to the tool are alleviated; and subjecting the tiller to vacuum heat treatment after tapping, which improves the wear resistance of the tiller, removes thermal stress inside the tool, and extends the effective life of the tool.
    公开号:BE1026868B1
    申请号:E20195337
    申请日:2019-05-23
    公开日:2020-07-16
    发明作者:Weimin Long；Sujuan Zhong；Shengnan Li；Jian Qin；Yinyin Pei；Quanbin Lu；Xiupeng Li；Yuanxun Shen
    申请人:Zhengzhou Res Inst Mechanical Eng Co Ltd；
    IPC主号:
    专利说明:

    Wear Resistant Layer For Tiller Tool Technical Field The present disclosure relates to the technical field of agricultural machinery, and more particularly relates to a wear resistant layer for a tiller tool.
    Technical background Soil milling machines are one of the main soil cultivation devices in China.
    A soil tiller is a type of soil cultivating machine in which the working part actively rotates and works the soil according to the principle of a milling cutter, whereby the soil cultivation work has to be done once.
    And the tiller has operational characteristics like good tillage quality, high performance, reduction in the number of tillage, and even soil-fertilizer mix, so it is widely applicable to tillage before plants in dry land.
    In addition, the tiller can shorten the cultivation and cultivation time considerably, and serve to shorten working hours and increase work performance.
    The tiller mainly consists of a frame, a drive system, a rotating milling shaft, a milling knife (tiller cutter) and a cover or the like.
    The main factor affecting the tiller life is the wear resistance of the tiller cutter, and the quality of existing tiller blades in China can hardly reach the international advanced level: wear and replacement of tiller blades as the main wear part of the tiller cause every year big losses.
    Statistically speaking, the
    The duration of an ordinary tiller cutter under normal circumstances in cohesive soil is 20-35 hm / piece, while the useful life in sand is only 3.3-5.5 hm / piece.
    In addition, a worn tillage part would result in increased drag and fuel consumption, and reduce labor performance and quality of agricultural machinery, and also increase labor costs.
    In addition, the exchange of tiller blades is time-consuming and labor-intensive, which impairs intensive work during the harvest season.
    The extension of the lifespan of the soil milling cutter therefore satisfies the needs for increasing the performance of agricultural machinery, improving the product quality and technological level of agricultural machinery in China, and lively demands for long-life wear-resistant tilling blades in China, and are therefore of significant importance.
    The main causes of a floor milling cutter failure in operation are breakage and wear, of which wear is a major reason.
    Methods to extend the life of tiller blades focus mainly on studies to improve the wear resistance of cutting tools, and for unchanged steel bodies of cutting tools, surface modification of the steel body is a preferred method of increasing wear resistance.
    During the work of the rotary tiller, the speed of movement of the rotary tiller cutter relative to the ground is extremely high, and the rotary tiller cutter is in a working environment with high wear and high impact.
    Therefore, it is necessary that the surface of a trencher has a high wear resistance, the layer has a high adhesive strength with the base body, the overall process costs are low and full automation is easy to implement.
    Subject of the Application To solve the above problems, the present disclosure provides a wear-resistant layer for a tiller, the tiller made according to this disclosure having positive properties, such as: high rigidity, corrosion resistance, impact resistance, low abrasion, high adhesive strength and long service life; and the manufacturing process is also simple, which improves the wear resistance and toughness of the tiller, extends the effective life of the tool, and lowers the production cost, all of which indicate appropriateness for marketing and application.
    The present disclosure is realized by the following technical solutions: A wear-resistant layer for a tilling tool is produced and has the following composition in percent by mass: 10% diamond micro powders, 0.5% -2.0% micronano-SiC powders, 3 % -5% TiH2 powders, and remaining parts of the soldering additive BNi82CrSiBFe.
    Furthermore, the diamond micropowders, the micronano-SiC powders, the TiH2 powders and the BNi82CrSiBFe soldering additive are all powdery, and each have a grain size in the range from 45-58 μm, 0.6-3 μm, 80-100 μm and 48-58 wm, and the oxygen contents thereof are all less than 800 ppm, and the impurity contents thereof are all less than 0.6% by weight.
    A method for producing a 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 in order to polish and smooth the cutting edge;
    Step 2: Weigh the diamond micropowder and BNi82CrSiBFe soldering additive according to the mass ratio above, and obtain a material mixture after mixing the two in a blender for 2 hours to prepare for the following steps;
    Step 3: Weigh the TiH2 powder and the micronano-SiC powder according to the mass ratio above, and add anhydrous ethanol and ZrO2 grinding balls after the mixture is placed in a planetary ball mill, and then obtain a powder mixture after the mixture is fully was constantly mixed and taken out, thereby preparing for the following steps;
    Step 4: adding the powder mixture obtained in Step 3 to a suspension to which a binder is added; then obtaining a mixed liquid after adding an appropriate amount of a dispersant; and making a paste of the material mixture after the in
    Step 2 obtained material mixture is added to the mixed liquid;
    Step 5: Apply the paste of the material mixture produced in step 4 evenly on both surfaces and one side surface on the cutting edge of the floor milling cutter, a thickness of 0.7-0.9 mm, a width of 14-16 mm, and a length of 144-146 mm can be realized under control; andthen obtaining a tiller with an applied wear-resistant layer after cooling and air drying to prepare for the following steps;
    Step 6: Place the floor milling tool with an applied wear-resistant layer in a drying cabinet, the temperature in the loading
    range of 110-130 ° C is maintained for 30-60 minutes, thus drying the moisture within the layer; and placing the dried
    then ground milling tool for heating in a vacuum soldering furnace, and performing solder coating of a wear-resistant layer; Step 7: Perform a vacuum heat treatment on the solder-coated floor milling tool, so that the treated floor milling tool 5 has a rigidity of 43-47 HRC.
    Furthermore, after cooling and air drying in step 5, the paste of the material mixture is again applied evenly to the floor milling cutter, which has already been coated with the paste of the material mixture, a thickness of 0.4-0.6 mm being achieved under control ; after cooling and air drying, the paste of the material mixture is again applied evenly to the first two layers, a thickness of 0.2-0.4 mm being achieved under control; and after cooling and air drying, a floor milling tool is obtained on which a wear-resistant layer is applied. 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 a vacuum level of 6x10 ° Pa and lasts 30 minutes, and then cooling in the furnace is realized.
    Further, in the vacuum heat treatment in step 7, the following process is performed, wherein the quenching takes place at a temperature of 800 + 10 ° C, the temperature is maintained for 10-15 minutes, and then oil cooling is performed; and then the tempering takes place at a temperature of 320 + 10 ° C and the temperature is maintained for 30-35 minutes.
    The present disclosure has the following beneficial effects:
    A wear-resistant diamond layer is applied on the basis of a common floor milling cutter, at the same time a flexible ceramic phase Ti3SiC2 is produced by / n-situ synthesis, so that the wear resistance of the tool is improved, and adverse influences of poor impact resistance of a brittle ceramic relative be mitigated to the tool. During the work of the floor milling cutter, the wear-resistant layer is in direct contact with the floor and therefore undergoes 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 tiller blade can be significantly extended with little additional cost, not only will the tiller blade work performance be increased, and tool change time and cost, and tiller maintenance time and cost will be reduced; the basic body of the tiller cutter is also fully utilized.
    DETAILED DESCRIPTION OF THE EMBODIMENTS The present disclosure is to be described in more detail below with reference to specific embodiments: A wear-resistant layer for a floor milling tool is produced and has the following composition in percent by mass: 10% diamond micro powder, 0.5% -2, 0% micronano-SiC powders, 3% -5% TiH2 powders, and remaining parts of the BNi82CrSiBFe soldering additive.
    Furthermore, the diamond micropowders, the micronano-SiC powders, the TiHz powders and the BNi82CrSiBFe solder additive are all powdery, and each have a grain size in the range from 45-58 µm, 0.6-3 µm, 80-100 µm and 48-58 wm, and the oxygen contents thereof are all less than 800 ppm, and the impurity contents thereof are all less than 0.6% by weight.
    A method for producing a wear-resistant layer for a soil milling tool comprises the following specific steps:
    Step 1: Perform shot peening and sandblasting on the surface of a tiller cutter to remove oil pollution and oxide skin as well as the
    Polish and smooth cutting edge;
    Step 2: Weigh the diamond micropowder and BNi82CrSiBFe soldering additive according to the mass ratio above, and obtain a material mixture after mixing the two in a blender for 2 hours to prepare for the following steps;
    Step 3: Weigh the TiH2 powder and the micronano-SiC powder according to the mass ratio above, and add anhydrous ethanol and ZrO2 grinding balls after the mixture is placed in a planetary ball mill, and then obtain a powder mixture after the mixture is fully was constantly mixed and taken out, thereby preparing for the following steps;
    Step 4: adding the powder mixture obtained in Step 3 to a suspension to which a binder is added; then obtaining a mixed liquid after adding an appropriate amount of a dispersant; and making a paste of the material mixture after the in
    Step 2 obtained material mixture is added to the mixed liquid;
    Step 5: Apply the paste of the material mixture produced in step 4 evenly on both surfaces and one side surface on the cutting edge of the floor milling cutter, a thickness of 0.7-0.9 mm, a width of 14-16 mm, and a length of 144-146 mm can be realized under control; and
    Apply a thin coating several times after cooling and air drying, the thin coating preferably being carried out twice, and specifically on the tiller blade that has already been applied with the paste of the material.
    Al mixed, the paste of the material mixture is applied evenly again, a thickness of 0.4-0.6 mm is achieved under control, and after cooling and air drying, the paste of the material mixture is applied evenly to the first two Layers is applied, a thickness of 0.2-0.4 mm is realized under control; and after cooling and air drying, a tilling tool is obtained on which a wear-resistant layer is applied; In this process, the paste of the material mixture is applied thinly several times to both surfaces and one side surface on the cutting edge of the tiller cutter, and therefore a low adhesive strength with the base body is avoided due to a layer applied once thickly.
    Step 6: placing the floor milling tool with an applied wear-resistant layer in a drying cabinet, the temperature being maintained in the range from 110-130 ° C. for 30-60 minutes, and thus the moisture inside the layer being dried; and then placing the dried floor milling tool in a vacuum soldering oven for heating, and performing a solder coating of a wear-resistant layer; wherein the process for vacuum solder coating has the following process parameters, namely the temperature in the range of 1050 ° C-1080 ° C is maintained in an environment with a degree of vacuum of 6x103 Pa for 30 minutes, and then a cooling in the furnace is realized, this with a wear-resistant layer coated tool is first dried before vacuum solder coating in order to avoid defects such as pores in the interior of the wear-resistant layer produced; Step 7: Perform a vacuum heat treatment on the solder coated floor milling tool to remove the internal stress of the material and to improve the wear resistance and the toughness of the floor milling cutter so that the treated floor milling tool has a rigidity of
    43-47 HRC, with the vacuum heat treatment, the following process is carried out, the quenching takes place at a temperature of 800 + 10 ° C, the temperature is maintained for 10-15 minutes, and then an oil cooling is carried out; and then the tempering takes place at a temperature of 320 + 10 ° C. and the temperature is maintained for 30-35 minutes, working example 1: a quenched 65Mn steel was selected as base material and the selected sample was subjected to a surface treatment such as Shot blasting and sandblasting to remove oil contamination and oxide skin and to polish and smooth the pre-coated wear-resistant layer. 10% diamond micropowder and 83.5% BNi82CrSiBFe powder were weighed out according to a predetermined mass ratio and placed in a blender and, after mixing, removed for 2 hours; 5% TiH2 powder and 1.5% micronano-SiC powder were ground in a ball mill and then added to a suspension to which a binder has already been added; thereafter, an appropriate amount of a dispersant was added to obtain a mixed liquid; the material mixture was added to the mixed liquid, and therefore the material mixture was made into a paste-like paste of the material mixture; and the micronano-SiC powders were dispersed in the suspension, whereby agglomeration of the micronano-SiC powders is to be prevented.
    The paste of the material mixture produced was applied evenly to a surface-treated sample and tiller cutter with a specification of ó6mmx25mm and 25mmx5mmx100mm, a thickness of 0.8 mm being realized under control; after cooling and air drying, the paste of the material mixture was again applied evenly to the sample and the tiller cutter, which had already been coated with the paste of the material mixture, a thickness of 0.5 mm being achieved under control; after cooling and air drying, the paste of the material mixture was again applied evenly to the first two layers, a thickness of 0.3 mm being achieved under control; after cooling and air drying, a sample and a floor milling tool were then obtained, to each of which a wear-resistant layer was applied; and the coated sample and coated tiller knife have been dried, undergoing operations such as vacuum solder coating at a high temperature and vacuum heat treatment after soldering, and finally a sample and a tiller cutter with a wear-resistant layer were obtained.
    Comparative example 1: 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 embodiment 1 with a wear-resistant layer, a wear test 1 was carried out in each case: For the steel materials of the base body, ie welded Q235 steel as well as quenched 65Mn steel, a wear test 1 was carried out using a ZX50C milling and drilling machine, a sample with a specification of J6mmx25mm was attached to a spindle, an 80 * SiC sandpaper was glued to a worktable, and the wear test under a fixed load was completed by reciprocating a feed shaft for one hour with the rotation of the spindle, whereby a relative reduction in the thickness of the wear-resistant layer was obtained by a theoretical calculation, and a quantitative analysis the wear resistance of the wear-resistant layer was realized; The relative thickness reduction of the steel material base body was calculated from the density and the weight reduction: the relative thickness reduction 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; A wear test 1 was carried out for the sample with a wear-resistant layer produced in exemplary embodiment 1, using a ZX50C milling and drilling machine, a sample with a specification of demmx25mm being attached to a spindle, and an 80 * SiC sandpaper on one Worktop 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 reduction in thickness 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; After the ratio of the diamond, micronano-SiC, TiH2 and BNi82CrSiBFe, the density of the wear-resistant layer was calculated so that the ratio of diamond: TiH2: SiC: BNi82CrSiBFe is 10: 5: 1.5: 83.5, and that Density is 7.54 g / cm3; and the relative thickness reduction of the wear-resistant layer was calculated from the density and the weight reduction: the relative thickness reduction h of the wear-resistant composite layer of diamond: 0.007x1000 / 7.54 = hx3.14x32, and h = 0.033 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 d6mmx25mm:
    Table 1 Changes in weights and dimensions for wear tests 1 hour wear-resistant (welded) | (quenched) layer test the test reductone | 0007 | 0378 | 0.241 Test the test ge om [nn (calculated) / mm Comparative Example 2:
    A wear test 2 was carried out 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 a wear-resistant layer:
    For the steel materials of the basic body, i.e. curly Q235 steel so-
    Like quenched 65Mn steel, a friction and abrasion test 2 was performed using a self-made test platform and a sample of a steel material with a specification of 25mmx5mmx100mm was attached to a rotatable shaft through a through hole at one end and then in an environment with mixed sand and
    Water was placed, a change in mass was determined by weighing before and after turning at a speed of 200 r / min for 8 hours; A friction and abrasion test 2 was carried out for the sample with a solder-coated wear-resistant layer, with a self-made test
    platform was used, and a specimen with a specification of 25mmx5mmx100mm was attached through a through hole at one end to a rotatable shaft and then placed in a mixed sand and water environment with a mass change by weighing before and after rotating at a speed of 200 r / min was determined for 8 hours;
    Table 2 shows the changes in weights of the sample, the welded Q235 steel and the quenched 65Mn steel, all of which have a specification of 25mmx5mmx100mm:
    Table 2 Weight changes of samples before and after wear 8 hours wear-resistant (welded) | (quenched) layer test the test
    Comparative Example 3: A tiller cutter without wear-resistant treatment was mounted directly in a tiller and carried out a soil cultivation work in the arable soil, the service life of the tiller cutter being tested;
    An entire set of a tiller cutter with a solder-coated, wear-resistant layer was installed in a tiller and carried out soil cultivation work in the arable soil, the service life of the cutter cutter being tested; From the actual tillage results of the tiller cutters, it can be determined that a tiller cutter made of welded Q235 steel without wear-resistant surface treatment is able to cultivate a field of 21.8776 hectares, and a tiller cutter made of quenched 65Mn steel without 22.1444 -Hectare-arable soil can cultivate, while a tiller with a wear-resistant layer can cultivate 90.5119-hectare-arable soil, from which it must be concluded that the actual life of the tiller blade with a wear-resistant layer during the test run 4.09 to 4.13- times that of a tiller cutter without wear-resistant treatment.
    Only the basic principles, main features and advantages of the present disclosure are shown and described above, and it is to be understood by those skilled in the art that the present disclosure is not limited to the above embodiments. The foregoing embodiments and the description only explain the principles of this disclosure, and various changes and modifications of this disclosure may be made without departing from the spirit and scope of this disclosure, and these changes and modifications also fall within the scope of the present disclosure, and the scope of the disclosure are defined by the appended claims and their equivalents.
    权利要求:
    Claims (6)
    [1]
    1. Wear-resistant layer for a floor milling tool, characterized in that the wear-resistant layer produced has the following composition in percent by mass: 10% diamond micropowders, 0.5% -2.0% micronano-SiC powders, 3% -5% TiH2 powders, and remaining portions of BNi82CrSiBFe solder additive.
    [2]
    2 Wear-resistant layer for a floor milling tool according to claim 1, characterized in that the diamond micropowders, the micronano-SiC powder, the TiHz powder and the BNi82CrSiBFe solder additive are all powdery, and each have a grain size in the range of 45- 58 µm, 0.6-3 µm, 80-100 µm and 48-58 µm, and the oxygen contents thereof are all less than 800 ppm and the impurity contents thereof are all less than 0.6% by weight.
    [3]
    3. A method of producing a 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 sand blasting on the surface of a floor milling cutter to polish and smooth the cutting edge; Step 2: Weigh the diamond micropowder and BNi82CrSiBFe soldering additive according to the mass ratio above, and obtain a material mixture after mixing the two in a blender for 2 hours to prepare for the following steps; Step 3: Weigh the TiH2 powder and the micronano-SiC powder according to the mass ratio above, and add anhydrous ethanol and ZrO2 grinding balls after the mixture is placed in a planetary ball mill, and then obtain a powder mixture after the Ge -
    mixing has been completely mixed and taken out, thereby preparing for the following steps; Step 4: adding the powder mixture obtained in Step 3 to a suspension to which a binder is added; then obtaining a mixed liquid after adding a dispersant; and preparing a paste of the material mixture after the material mixture obtained in step 2 is added to the mixed liquid; Step 5: Apply the paste of the material mixture produced in step 4 evenly on both surfaces and one side surface on the cutting edge of the floor milling cutter, a thickness of 0.7-0.9 mm, a width of 14-16 mm, and a Length of 144-146 mm can be realized under control; and then obtaining a tiller with an applied wear resistant layer after cooling and air drying to prepare for the following steps; Step 6: placing the floor milling tool with an applied wear-resistant layer in a drying cabinet, the temperature being maintained in the range of 110-130 ° C. for 30-60 minutes, and thus the moisture inside the layer being dried; and then placing the dried tiller tool in a vacuum brazing oven for heating, and performing a braze coating of a wear resistant layer; Step 7: Perform 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.
    [4]
    4. A method for producing a wear-resistant layer for a floor milling tool according to claim 3, characterized in that after cooling and air drying in step 5 on the floor milling cutter, the loading
    is already coated with the paste of the material mixture, the paste of the material mixture is applied evenly again, a thickness of 0.4-0.6 mm being realized under control; after cooling and air drying, the paste of the material mixture is again applied evenly to the first two layers, a thickness of 0.2-0.4 mm being achieved under control; and after cooling and air drying, a floor milling tool is obtained on which a wear-resistant layer is applied.
    [5]
    5. A method for producing a wear-resistant layer for a floor milling tool according to claim 3, characterized in that the process for heating in the vacuum soldering oven in step 6 has the following process parameters, namely the temperature in the range of 1050 ° C-1080 ° C in an environment maintained with a vacuum level of 6x10 ° Pa for 30 minutes, and then cooling in the oven is realized.
    [6]
    6. A method for producing a wear-resistant layer for a floor milling tool according to claim 3, characterized in that the following process is carried out in the vacuum heat treatment in step 7, the quenching taking place at a temperature of 800x10 ° C, the temperature is maintained for 10-15 minutes, and then oil cooling is performed; and then the tempering takes place at a temperature of 320 + 10 ° C, and the temperature is maintained for 30-35 minutes.
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    法律状态:
    2020-08-26| FG| Patent granted|Effective date: 20200716 |
    优先权:
    申请号 | 申请日 | 专利标题
    CN201811525206.0A|CN109663922B|2018-12-13|2018-12-13|Wear-resistant coating for rotary tillage cutter|
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