• 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 invention relates to a method for producing a composite roll (1), wherein a working layer (3) is produced on a base body (2) by hot isostatic pressing of a powder. In order to produce large-sized work rolls for hot or cold strip mills, the invention provides that after demisostatic pressing of the base body (2) by welding pins (4) are attached to the base body (2). Furthermore, the invention relates to a compound roller (1) produced according to the invention.
    公开号:AT512939A4
    申请号:T50250/2012
    申请日:2012-06-26
    公开日:2013-12-15
    发明作者:Karl H Dr Ing Schroeder
    申请人:Schroeder；
    IPC主号:
    专利说明:

    liÄSÜli iü Bo 2012/50250 1
    Process for making a composite roll and composite roll made therewith
    The invention relates to a method for producing a composite roll, wherein a working layer is produced on a base body by hot isostatic pressing of a powder.
    Furthermore, the invention relates to a composite wadding, comprising a base body and a working layer applied thereto by hot isostatic pressing of a powder, and pins adjoining the base body laterally. 10
    Hot work rolls for flat products made of steel, such as steel strip or sheet steel, are today almost exclusively designed in the state of the art as composite rolls, which are or are produced by centrifugal casting. In this case, an integrated, outer working layer is provided, which is mounted on a soul, which comprises a base body with 15 molded pins. The working layer usually consists of an alloyed chilled cast iron, high-chromium alloyed steel or tool steel. The soul is usually made of cast iron with Kugelgrafit. In addition, there are also rolls in which a steel axis is encapsulated with a working layer For small designs of a rolling mill, there are also rolls in which the working layer is applied by hot isostatic pressing of a powder or "HIPen".
    Cold work rolls for flat products made of steel or non-ferrous metals are, like Wanmarbeitswalzen for non-ferrous metals according to the prior art made in one piece from a forged steel, after which hardening of the rollers takes place in the work area, in particular by inductive hardening.
    In rolling technology, there is a need to further increase the performance of rolls by reducing wear. For this purpose, it is necessary that the working layer, which is formed on the main body of the roller and which is subject to the 30 highest loads in use, as possible wear-resistant. The main body in conjunction with the working layer with regard to the wear resistance of the roller is also considerable and should also be optimized with respect to a longevity of the roller. Finally, the same applies to the pins, which are connected to a drive and via which a power transmission takes place. 2 2 [10 2012/50250
    Work rolls for hot or cold strip mills have a considerable dimension along the longitudinal axis of the roll, which may well be several meters. These large dimensions make it difficult to manufacture highly wear resistant rollers in a cost effective manner. 5
    The object of the invention is to provide a method of the type mentioned above, with the highly wear-resistant composite rollers can be produced in an efficient and cost-effective manner, the method should be flexible at the same time with respect to different roller dimensions. 10
    Another object of the invention is to provide a composite roller of the type mentioned, which is largely independent of their length efficiently and inexpensively. The procedural object of the invention is achieved if in a method of the type mentioned after the hot isostatic pressing of the body by welding pins are attached to the body.
    The invention makes use of the knowledge that, contrary to expert expectations, the pins, which provide for a power transmission in operation, not integrally formed with the body or fixed thereto by fasteners, but also can be retrofitted by welding. Surprisingly, it has been shown that corresponding seams on the connection of pin and body have sufficient stability to withstand high loads in use. Because the trunnions are retrofitted, it is also possible to use trusses of dimensions that exploit the currently largest available hot isostatic presses with 4.0 meter working zones. Thus, on the one hand, highly wear-resistant composite rolls can be created because the working layer is applied by hot isostatic pressing, for which purpose a suitable powder can be readily found (eg, a tool steel powder). On the other hand, due to the exploitation of the dimensions of existing hot isostatic plants and composite rolls can be created with appropriate dimensions of the working layer, which is made possible by the subsequent attachment of the pins. 3 ^ nted; 27-0iS0i2 ÜÜ
    It is of particular advantage if the pins are attached by electron beam welding to the base body. Electron beam welding leads only to a locally very limited heating, so that the body is not thermally stressed during welding or a heat load on the body is extremely low. This is advantageous, in particular, because a maximum service life of the composite roller is determined not only by the working layer alone but also by the main body or bale.
    It is expedient that the pins are fixedly positioned during welding to the base body 10, so that the most perfect possible connection of pin and body is achieved. A positioning or fixing can be done by welding stitcher, by a shrink connection or, with a suitable design of body and pin, by tie rods. Also possible is a threaded connection between the pin and the base body, so that the objects to be welded remain stable in position relative to each other during welding.
    In a preferred variant, a continuous opening is introduced into the main body before the hot isostatic pressing. The introduction of the opening is preferably carried out by machining, preferably drilling. The continuous opening in the body facilitates a controlled adjustment of
    Wear characteristics and the Egenspannungszustandes of the body.
    In hot isostatic pressing, powder is usually enclosed in a metal jacket, which is dimensioned so that a desired layer thickness is achieved after the shrinkage associated with the sintering. It can be provided that the main body is designed to be longer than the working layer and protrudes from the metal jacket or the press can for the powder at least at one point, preferably at both ends, which is attached laterally to the main body. The main body is then slightly longer than the working layer, which results in the subsequent welding of the pin of 30 advantage that the working layer not by a heat during the
    Welding can be affected. If an opening or bore is provided in the main body and protrudes from it during hot isostatic pressing from the press can, this also has the advantage that a temperature gradient in the main body is markedly reduced during heating, while on one outer side of the latter there is a susceptor a powder, for example a tool steel powder.
    It is expedient if the main body is provided for hot isostatic pressing in the 5 mounting areas of the press can with an allowance. The attachment areas are located at the ends of the body. If an oversize is provided there, then the press can for hot isostatic pressing can be fastened there. In the other areas, a distance between the press can and the body is then given. In the appropriate space is formed during the 10 hot isostatic pressing from the filled into the free space powder, the working layer.
    It can be provided that the main body is preheated before hot isostatic pressing. A preheating brings the advantage that in the body or bales 15 when attaching the working layer by hot isostatic pressing no large temperature gradients occur, which could adversely affect a microstructure of the body. The preheating can basically be done arbitrarily, but should take into account the temperature gradient in the body. The pre-quenching is preferably carried out by conductive heating, since in this case the temperature gradient approaches zero.
    In order to keep a process time as short as possible, the main body can be removed from a press chamber after hot isostatic pressing in the warm state. However, it is also possible to let the main body with it applied 25 working layer in usually slowly cool.
    After the hot isostatic pressing, the base body and working layer can be subjected to a heat treatment before the pins are welded on, in particular in order to optimize the mechanical characteristics. 30
    As a base body, a good weldable steel is preferably used. For this purpose, in particular conventional forging steels in question, for. B. steels comprising 0.14 to 0.19 wt .-% carbon, 0.40 wt .-% maximum silicon, 1.0 to 1.3 wt .-% manganese and 0.80 to 1.1 wt. % Chromium. Such forged steels are also often under the
    5
    Designation 16MnCr5 and correspond to the material numbers DIN 1.7131 and 1.7139.
    It is expedient that end faces of the main body are machined, in particular ground, prior to the welding of the pins 5 in order to obtain the best possible connection of the pin and the base body.
    The further object of the invention is achieved by a composite roll of the type mentioned, in which the pins are welded, io
    A compound roll according to the invention can be produced effectively and inexpensively, even if their dimensions are four or more meters. In this case, the pins are preferably welded by electron beam welding, because this does not thermally stress the base body during welding or only negligibly.
    It is preferred that the main body along its longitudinal axis has a through opening, as can be controlled via this hole residual stress conditions and in particular during production lower temperature gradients occur 20 and quenching or hardening cooling of the body can be done from the inside.
    As explained above, the main body of a composite roll according to the invention preferably consists of a hot-workable steel, in particular a forged steel, which is preferably readily weldable.
    Further features, advantages and effects of the invention will become apparent from the embodiment illustrated below. In the drawings, which are referred to, show: 30
    1 shows a blank of a main body before a hot isostatic pressing.
    FIG. 2 shows a basic body according to FIG. 1 in a press container for hot isostatic pressing; FIG.
    Fig. 3 is a composite roll. 27-06-201: 2 [1020 ^ 50250
    A method according to the invention is illustrated in greater detail with reference to FIGS. 1 to 3. In Fig. 1, a blank of a base body 2 and bale is shown. The blank of the main body 2 is usually formed from a forged steel which is readily weldable (eg a steel with a composition according to DIN 1.7131), and is round in the cross-section to the longitudinal axis X up to the ends 21,22. At the ends 21, 22, the blank has an allowance. This allowance at the ends 21, 22 is measured primarily at the precipitation diameter of the roll to be created.
    In Fig. 2, the blank of the main body 2 of FIG. 1 is shown together with a press can 6 io or a metal jacket. The press can 6 is attached approximately centrally to the ends 21, 22 of the blank of the main body 2 in the region of the oversize, for example by welding. In a space between the press can 6 and the blank of the base body 2, which results from the attachment of the press can 6 in Aufmaßbereich or the ends 21, 22, a Pulvermetaliurgisch produced tool steel powder 15 is positioned, which forms a working layer 3 after hot isostatic pressing later The blank of the main body 2 protrudes, as shown in Fig. 2, at the ends 21, 22 beyond the press can 6 addition. This brings in hot isostatic pressing in a press chamber the advantage that convection also occurs in the interior of the base body 2, which is provided with a central opening 5 or bore, and thus a thermal load or 20 temperature gradients within the body 2 are minimized. After applying the working layer 3 by hot isostatic pressing, usually in the temperature range of 1050 ° C to 1250 ° C and at pressures of about 100 to 150 MPa in a protective gas atmosphere of z. As argon or nitrogen, the main body 2, together with applied working layer 3 is removed from the press chamber and the press box 6 25 removed. The working layer 3 is firmly connected to the main body 2 due to the hot isostatic pressing. A longitudinal extension of the working layer 3 is chosen so that it extends over the entire length of the bale roll barrel, so the correspondingly dimensioned length of the base body 2, except the ends 21,22. Subsequently, two pins 4 are attached to the end faces of the main body 2 30, wherein the end faces previously processed, for example, ground, can be. The Aufmaßbereiche at the ends 21, 22 can also be turned off. For this purpose, the two pins 4 are initially positioned firmly against the front sides with a minimum gap. If the pins 4, like the base body 2, are provided with a central, longitudinally extending opening or bore, the pins 4 can be adjusted by (Printed:
    7
    Tie rods done. If the pins 4 are formed as shown without such holes, they can be pressed by suitable contact pressure, for example, a hydraulically actuated piston to the end faces. If the pins 4 are set against the end faces of the main body 2, in a next step, the pins 5 are connected to the main body 2 by electron beam welding, usually at a pressure of 10'3 mbar or less. The composite roller 1 according to FIG. 3 is thus essentially created. In the area of the ends 21,22, where there is still an allowance, a post-processing by machining processes to indemnify the working layer side, if this has not been done before. Thereafter, the finishing io the roller takes place.
    Practical tests have shown that a composite roll 1 produced according to the invention withstands high loads despite the attachment of the pins 4 by welding. In this case, it is possible due to the manufacturing process to form the compound roll 1 15 with a total length of more than four meters along the longitudinal axis X, so that the composite roll 1 can be used in particular as a roll in hot or cold strip lines, especially in the processing of semi-finished products Steel like ribbons or sheets.
    权利要求:
    Claims (15)
    [1]
    1. A method for producing a composite roll (1), wherein on a base body (2) a working layer (3) is produced by hot isostatic pressing of a powder, characterized 5 characterized that after hot isostatic pressing of the base body (2) by welding pins (4) are attached to the base body (2).
    [2]
    2. The method according to claim 1, characterized in that the pins (4) by electron beam welding to the base body (2) are mounted. 10
    [3]
    3. The method according to claim 1 or 2, characterized in that the pins (4) during welding to the base body (2) are fixedly positioned.
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that before 15 the hot isostatic pressing in the base body (2) a continuous opening (5) is introduced.
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that the base body (2) for hot isostatic pressing in lateral areas in a press cell (Θ) is fixed, wherein the base body (2) at least one location, preferably at both Ends (21, 22), from the press can (6) protrudes.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that the base body (2) is provided for hot isostatic pressing in the mounting areas of the 25 press can (6) with an allowance.
    [7]
    7. The method according to any one of claims 1 to 6, characterized in that the base body (2) is preheated before hot isostatic pressing.
    [8]
    8. The method according to claim 7, characterized in that the preheating is carried out by conductive heating. fprinted: 27-06-2012 1015 {102012 / 00¾ θ θ. Method according to one of claims 1 to 8, characterized in that the main body (2) is removed after the hot isostatic pressing in the hot state from a pressing chamber.
    [9]
    10. The method according to any one of claims 1 to 9, characterized in that the base body (2) together with working layer (3) after hot isostatic pressing and before welding the pin (4) is subjected to a heat treatment.
    [10]
    11. The method according to any one of claims 1 to 10, characterized in that as 10 basic body (2) a good weldable steel is used.
    [11]
    12. The method according to any one of claims 1 to 11, characterized in that front sides of the base body (2) before the welding of the pin (4) machined, in particular ground, are. 15
    [12]
    13. Composite roller (1), comprising a base body (2) and applied thereto by hot isostatic pressing a powder working layer (3) and laterally on the base body (2) subsequent pin (4), characterized in that the pins (4) are welded , 20
    [13]
    14. Composite roller (1) according to claim 13, characterized in that the pins (4) are welded by electron beam welding.
    [14]
    15. Composite roller (1) according to claim 13 or 14, characterized in that the base body (2) along its longitudinal axis (X) has a through opening (5).
    [15]
    16. Composite roller (1) according to any one of claims 13 to 15, characterized in that the base body (2) consists of a good weldable steel.
    类似技术:
    公开号 | 公开日 | 专利标题
    EP1882109B1|2009-04-15|Antifriction bearing race, particularly for highly stressed antifriction bearings in aircraft power units and methods for the production thereof
    DE10331061B4|2005-05-19|Annular composite workpieces and cold rolling process for their production
    EP3088084B1|2017-11-22|Hard element for grid armoring for a roller press, method for producing the same, and roller for a roller press
    DE2228793A1|1972-12-21|Heavy duty composite bushing and method of their manufacture
    WO2006119944A1|2006-11-16|Method and installation for hardening fillets of a shaft
    EP3428300A1|2019-01-16|Roller for a grinding or/and pressing device, in particular compression roller for a press for the production of pellets, and method of manufacturing the roller
    DE2228795A1|1972-12-21|High strength composite machine element and process for its manufacture
    EP2864063B1|2021-08-11|Method for producing a composite roll and composite roll produced thereby
    EP1263540B1|2004-06-30|Method for the production of thin-walled steel components and components produced therefrom
    EP1937431B1|2010-09-01|Method for producing a strand-guiding roller
    EP3141335B1|2021-04-14|Method for producing a component having a core section made of steel
    EP2756897A1|2014-07-23|Method for producing a flat product in the form of a metallic composite material
    DE102012112029A1|2014-06-12|Method for manufacturing of ring-shaped operation element of door actuator for actuation of door, involves providing door actuator having housing in which functional elements comprising axial profile rolling tube are added
    DE19955321B4|2008-02-07|Rotary swaging machine with hydraulic force compensation
    DE2711810A1|1977-10-20|ROLLER STRUCTURE
    EP3160664B1|2018-06-06|Roll and method for producing a roll for the hot or cold rolling of flat metal products
    DE102016116869B4|2018-11-15|furnace roller
    DE102012204927B3|2013-07-04|A job-welded workpiece and method of making a job-welded workpiece
    EP0378986A1|1990-07-25|Bearing
    DE2922639A1|1980-12-04|Strength increasing process for gear-teeth - uses roller to provide plastic deformation of metal at tooth root
    EP1366895B1|2005-09-14|Composite flat element
    EP1857193B1|2010-01-20|Method for hot rolling seamless pipes on an inner tool and inner tool
    DE102015122975B3|2017-03-23|Method for producing a hot forming tool
    EP3126689B1|2018-06-06|Demountable hub connection
    EP0593408A1|1994-04-20|Compound roll
    同族专利:
    公开号 | 公开日
    EP2864063B1|2021-08-11|
    WO2014001024A1|2014-01-03|
    RU2636648C2|2017-11-24|
    BR112014032372A2|2017-06-27|
    CN104411420A|2015-03-11|
    RU2015102205A|2016-08-20|
    EP2864063A1|2015-04-29|
    IN2014MN02607A|2015-09-11|
    AT512939B1|2013-12-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS58187208A|1982-04-23|1983-11-01|Kubota Ltd|Rolling roll having strong and tough neck part and its production|
    JPH01166809A|1987-12-21|1989-06-30|Kubota Ltd|Long-sized and small diameter composite roll|
    JPH08155660A|1994-12-06|1996-06-18|Kobe Steel Ltd|Manufacture of joint of dissimilar material excellent in bonding strength|
    JP2006122978A|2004-09-30|2006-05-18|Jfe Steel Kk|Roll for rolling metallic plate|
    JPS6036355B2|1981-06-24|1985-08-20|Hitachi Ltd|
    JPS646842B2|1983-06-07|1989-02-06|Kubota Ltd|
    JPH0446648B2|1983-08-22|1992-07-30|Kubota Kk|
    JPS6046889A|1983-08-24|1985-03-13|Kuroki Kogyosho:Kk|Production of multi-layered roll|
    JPH0379085B2|1985-03-26|1991-12-17|Kubota Kk|
    JPH01237083A|1988-03-15|1989-09-21|Kuroki Kogyosho:Kk|Method for manufacturing and repairing conductor roll|
    EP1283079A1|2000-05-16|2003-02-12|Kawasaki Steel Corporation|Composite roll of cemented carbide, and steel hot-rolling method using the same|
    RU2241047C2|2002-03-18|2004-11-27|Открытое акционерное общество "Научно-исследовательский технологический институт "Прогресс"|Method of thermal treatment of welded connections from maraging steels|
    JP3743793B2|2002-10-28|2006-02-08|日鉄ハイパーメタル株式会社|Composite roll for hot rolling, method for producing the same, and hot rolling method using the same|
    FI20031249A|2003-09-03|2005-03-04|Metso Powdermet Oy|Process for making roll-shaped products|
    DE102006042752A1|2006-09-12|2008-03-27|Shw Casting Technologies Gmbh|Method for producing a tubular body for further processing into a roll|
    GB2464968A|2008-10-31|2010-05-05|Welding Alloys Ltd|Manufacture of composite rollers|
    CN101412105B|2008-11-28|2013-03-06|北京工业大学|Method for producing wear-resistant composite roller|DE102014108823B9|2014-06-24|2016-10-06|Steinhoff Gmbh & Cie. Ohg|Roller and method for producing a roll for hot or cold rolling of flat metal products|
    SI3141335T1|2015-09-08|2021-08-31|Deutsche Edelstahlwerke Specialty Steel Gmbh & Co. Kg|Method for producing a component having a core section made of steel|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50250/2012A|AT512939B1|2012-06-26|2012-06-26|Process for making a composite roll and composite roll made therewith|ATA50250/2012A| AT512939B1|2012-06-26|2012-06-26|Process for making a composite roll and composite roll made therewith|
    RU2015102205A| RU2636648C2|2012-06-26|2013-06-03|Manufacture method of composite rolls and composite roll|
    PCT/EP2013/061401| WO2014001024A1|2012-06-26|2013-06-03|Method for producing a composite roll and composite roll produced thereby|
    BR112014032372A| BR112014032372A2|2012-06-26|2013-06-03|process for producing composite cylinder and composite cylinder produced by the same|
    CN201380034293.9A| CN104411420A|2012-06-26|2013-06-03|Method for producing a composite roll and composite roll produced thereby|
    EP13728347.9A| EP2864063B1|2012-06-26|2013-06-03|Method for producing a composite roll and composite roll produced thereby|
    IN2607MUN2014| IN2014MN02607A|2012-06-26|2014-12-24|
    [返回顶部]