EP0528720A1 - Verfahren zum Co-Laminieren von Schnellstahl auf Weichstahl - Google Patents

Verfahren zum Co-Laminieren von Schnellstahl auf Weichstahl Download PDF

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Publication number
EP0528720A1
EP0528720A1 EP92402249A EP92402249A EP0528720A1 EP 0528720 A1 EP0528720 A1 EP 0528720A1 EP 92402249 A EP92402249 A EP 92402249A EP 92402249 A EP92402249 A EP 92402249A EP 0528720 A1 EP0528720 A1 EP 0528720A1
Authority
EP
European Patent Office
Prior art keywords
steel
support
setting
mild steel
mild
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92402249A
Other languages
English (en)
French (fr)
Other versions
EP0528720B1 (de
Inventor
Michel Jonas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Acieries Et Forges D'anor A Responsabilite Ltee Ste
Original Assignee
Acieries Et Forges D'anor A Responsabilite Ltee Ste
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Publication date
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Publication of EP0528720A1 publication Critical patent/EP0528720A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B22F2005/001—Cutting tools, earth boring or grinding tool other than table ware
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy

Definitions

  • the subject of the present invention is a process making it possible to carry out a co-rolling of a medium or high alloy steel on a mild steel, which has hitherto never been possible to carry out industrially.
  • Colaminating is a well-known process which makes it possible to press by forging at a temperature of about 1150 ° C. a setting of noble steel, therefore expensive, on a support of low-alloy steel, therefore inexpensive.
  • bimetallic bars are obtained, also called insert bars or composite steel bars or even steel bars.
  • This co-laminating technique is currently used mainly for the manufacture of wear plates, for example rolling mill slides, or for the manufacture of industrial-edge blades and knives, for example paper cutter blades, unwinding machines or wood slicer.
  • low alloy steel will be understood to mean steel grades comprising a maximum percentage of 2% of alloying elements such as silicon (Si), molybdenum (Mo), tungsten (W), vanadium (V) and / or chromium (Cr) such as, for example, the grades 80WC20, 110WC10, 90MCW5, or 60WC20.
  • Medium or high alloy steels will be understood to mean steel grades comprising more than 2% of alloying elements such as for example Z160CDV12 or so-called high-speed steels of the 18-0-1 or 6-5-2 type, which are a special case of high alloy steels.
  • the object of the present invention is to enable industrial manufacture by co-rolling of expanded steel bars comprising medium or high alloy steel settings.
  • the stakes are constituted by alloy steels obtained by powder metallurgy in their raw state of compaction.
  • the invention consists in fact in the use of the mild steel gangue completely covering the sintered steel ingots after compaction as a bonding layer with the mild steel of the support and the counter-setting.
  • the production of steels and alloys by powder metallurgy is known: it consists in spraying the liquid metal into tiny droplets which are cooled in the form of powder constituted by microscopic spherical balls.
  • the alloy bars are obtained by very high pressure compacting of mild steel capsules containing alloy powder.
  • the ingots obtained are constituted by a sintered steel core to which is intimately linked a mild steel surface matrix coming from the capsule containing the powder before compacting.
  • the ingots are then rolled into bars and these bars are then machined to rid them of their mild steel gangue.
  • this gangue is preserved which during co-laminating will not cause not the appearance of oxides in harmful proportions with the sticking of the setting on its support.
  • Figure 1 illustrates the first phase of manufacturing the cutter blade.
  • the setting 1 is made of sintered high-speed steel provided with its mild steel compacting gangue on its mild steel support 2, by means of a weld bead 3.
  • the setting 1 is bordered by a mild steel counter-setting 6 which is also secured to the support 2 by a weld bead 3.
  • This coarse assembly by welding has the function of holding the parts 1, 2, and 3 during the co-laminating operation and of avoiding as much as possible the oxidation of the surfaces in contact during reheating to around 1100-1150 ° C which immediately precedes the co-lamination, the weld beads 3 playing the role of sealing beads.
  • the laminating operation is carried out, which is shown diagrammatically in FIG. 2.
  • the block produced in FIG. 1 and preheated is passed at least one, and preferably several times, through a rolling mill to obtain a wrought ratio of approximately 4 to 5.
  • stake 1 is made of a sintered steel bar having kept its gangue of mild steel, the quality of the forging obtained will ensure a very good physico-chemical bond between stake 1, counter stake 6 and support 2.
  • the bar is then heat treated and machined.
  • the parts 5a and 5b of the gangue are removed; a sharpening of the sintered high-speed steel core thus released makes it possible to form the cutting edge of the blade.
  • the holes and / or notches for fixing the tool 1 are made by drilling and / or milling in the mild steel part, namely the counter-setting and the support, this part not taking the hardening.
  • the invention is not limited to the manufacture of cutter blades such as that described above, but encompasses any steel bar / expanded alloy obtained by co-laminating a sintered alloy setting which has retained its gangue mild steel and any tool made from such a bar.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Powder Metallurgy (AREA)
  • Laminated Bodies (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Metal Rolling (AREA)
EP92402249A 1991-08-09 1992-08-07 Verfahren zum Co-Laminieren von Schnellstahl auf Weichstahl Expired - Lifetime EP0528720B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9110170A FR2680127A1 (fr) 1991-08-09 1991-08-09 Procede permettant le colaminage d'acier rapide sur un acier doux.
FR9110170 1991-08-09

Publications (2)

Publication Number Publication Date
EP0528720A1 true EP0528720A1 (de) 1993-02-24
EP0528720B1 EP0528720B1 (de) 1995-05-24

Family

ID=9416090

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92402249A Expired - Lifetime EP0528720B1 (de) 1991-08-09 1992-08-07 Verfahren zum Co-Laminieren von Schnellstahl auf Weichstahl

Country Status (6)

Country Link
US (1) US5246160A (de)
EP (1) EP0528720B1 (de)
JP (1) JPH0740064A (de)
AT (1) ATE122946T1 (de)
DE (1) DE69202652T2 (de)
FR (1) FR2680127A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108500277A (zh) * 2018-03-28 2018-09-07 上海汽车粉末冶金有限公司 一种粉末冶金表面致密化零件的制备方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT411581B (de) * 2000-07-05 2004-03-25 Boehler Ybbstal Band Gmbh & Co Verfahren zur herstellung von vormaterial und vormaterial für sägeblätter oder sägebänder
US7017465B2 (en) * 2002-07-29 2006-03-28 L.S. Starrett Company Cutting tool with grooved cutting edge
US7373857B2 (en) * 2002-07-29 2008-05-20 William Engineering Llc Composite metal article and method of making
US8387228B2 (en) * 2004-06-10 2013-03-05 Ati Properties, Inc. Clad alloy substrates and method for making same
US20160354877A1 (en) * 2015-06-04 2016-12-08 Tuo-Jen Chen Method for making bicycle folding tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686439A (en) * 1948-04-27 1954-08-17 Thoger G Jungersen Method of making cutting tools
FR2190556A1 (de) * 1972-06-27 1974-02-01 Crucible Inc
FR2391018A1 (fr) * 1977-05-16 1978-12-15 Carpenter Technology Corp Produit metallurgique fragile realise par frittage
GB2208389A (en) * 1987-08-06 1989-03-30 Mtu Muenchen Gmbh A method of manufacturing components having portions of different wall thickness
EP0330935A2 (de) * 1988-03-01 1989-09-06 SEILSTORFER GMBH & CO. METALLURGISCHE VERFAHRENSTECHNIK KG Verbundwalze

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2932886A (en) * 1957-05-28 1960-04-19 Lukens Steel Co Production of clad steel plates by the 2-ply method
US3228103A (en) * 1961-05-08 1966-01-11 Babcock & Wilcox Co Metal cladding
US3593600A (en) * 1969-04-29 1971-07-20 Continental Can Co Band saw blade apparatus and methods
US4428260A (en) * 1982-03-01 1984-01-31 Sperry Corporation Method of forming a cutting edge
JPS62157720A (ja) * 1985-12-27 1987-07-13 Kaneshika Kote Kogyo Kk 鋸用鋼板の製造法
EP0327064A3 (de) * 1988-02-05 1989-12-20 Anval Nyby Powder Ab Verfahren zur Herstellung pulvermetallurgischer Gegenstände, insbesondere langgestreckter Gegenstände, wie Stangen, Profile, Rohre od. dgl.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686439A (en) * 1948-04-27 1954-08-17 Thoger G Jungersen Method of making cutting tools
FR2190556A1 (de) * 1972-06-27 1974-02-01 Crucible Inc
FR2391018A1 (fr) * 1977-05-16 1978-12-15 Carpenter Technology Corp Produit metallurgique fragile realise par frittage
GB2208389A (en) * 1987-08-06 1989-03-30 Mtu Muenchen Gmbh A method of manufacturing components having portions of different wall thickness
EP0330935A2 (de) * 1988-03-01 1989-09-06 SEILSTORFER GMBH & CO. METALLURGISCHE VERFAHRENSTECHNIK KG Verbundwalze

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 86 (M-572)17 Mars 1987 & JP-A-61 238 902 ( AMADA ) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108500277A (zh) * 2018-03-28 2018-09-07 上海汽车粉末冶金有限公司 一种粉末冶金表面致密化零件的制备方法

Also Published As

Publication number Publication date
DE69202652T2 (de) 1996-02-08
JPH0740064A (ja) 1995-02-10
FR2680127A1 (fr) 1993-02-12
DE69202652D1 (de) 1995-06-29
EP0528720B1 (de) 1995-05-24
FR2680127B1 (de) 1995-01-13
US5246160A (en) 1993-09-21
ATE122946T1 (de) 1995-06-15

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