DK0467857T3 - Powder metallurgy tool steel - Google Patents

Powder metallurgy tool steel

Info

Publication number
DK0467857T3
DK0467857T3 DK91830235.7T DK91830235T DK0467857T3 DK 0467857 T3 DK0467857 T3 DK 0467857T3 DK 91830235 T DK91830235 T DK 91830235T DK 0467857 T3 DK0467857 T3 DK 0467857T3
Authority
DK
Denmark
Prior art keywords
tool steel
powder
bath
salt
temperature
Prior art date
Application number
DK91830235.7T
Other languages
Danish (da)
Inventor
Fabio Guglielmi
Giovanni Barcaro
Paolo Sommovigo
Original Assignee
Sviluppo Materiali Spa
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sviluppo Materiali Spa filed Critical Sviluppo Materiali Spa
Application granted granted Critical
Publication of DK0467857T3 publication Critical patent/DK0467857T3/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
    • C22C33/0292—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5% with more than 5% preformed carbides, nitrides or borides

Abstract

A new composition for powder-metallurgy (PM) tool steel, characterized by the absence of Co, reduction of W content and increase in Mo and V contents id disclosed. The steel contains (wt%) , C from 1,50 to 1.85, Mn from 0,20 to 0.55, Si from 0.35 to 0.70, W from 1.50 to 3.00, Mo from 8.00 to 9.50, V from 5.50 to 6.50, and Cr from 3-00 to 5.00, the remainder being iron and minor impurities. The powder used in the manufacturing process is obtained by atomization in a gas which may be nitrogen or argon, the ensuing particles being spherical in shape, 80% of them being smaller than 500 mu m. The manufacturing process comprises the following steps: cooling during powder solidification at a rate between 1000 and 10000 DEG C/s hot isostatic pressing to obtain a semifinished piece transformation of the semi into the desired product heating of the product in a salt-bath at a temperature between 1160 and 1200 DEG C for between 3 and 10 minutes hardening in a salt-bath at a temperature between 450 and 600 DEG C followed by cooling to room temperature series of three successive temperings at temperatures between 530 and 560 DEG C, between 540 and 570 DEG C, and again between 530 and 560 DEG C, each for between one and two hours. The tool steel, obtained in this way, contains precipited carbides of the M2C-MC type measuring less than 3.5 mu m and a volume fraction between 13 and 18%.
DK91830235.7T 1990-07-17 1991-05-30 Powder metallurgy tool steel DK0467857T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT48150A IT1241490B (en) 1990-07-17 1990-07-17 RAPID POWDER STEEL.

Publications (1)

Publication Number Publication Date
DK0467857T3 true DK0467857T3 (en) 1996-05-20

Family

ID=11264854

Family Applications (1)

Application Number Title Priority Date Filing Date
DK91830235.7T DK0467857T3 (en) 1990-07-17 1991-05-30 Powder metallurgy tool steel

Country Status (7)

Country Link
EP (1) EP0467857B1 (en)
AT (1) ATE135056T1 (en)
DE (1) DE69117605T2 (en)
DK (1) DK0467857T3 (en)
ES (1) ES2085457T3 (en)
GR (1) GR3019999T3 (en)
IT (1) IT1241490B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993002819A1 (en) * 1991-08-07 1993-02-18 Kloster Speedsteel Aktiebolag High-speed steel manufactured by powder metallurgy
SE500008C2 (en) * 1991-08-07 1994-03-21 Erasteel Kloster Ab High speed steel with good hot hardness and durability made of powder
US5578773A (en) * 1991-08-07 1996-11-26 Erasteel Kloster Aktiebolag High-speed steel manufactured by powder metallurgy
ES2181827T3 (en) * 1996-06-17 2003-03-01 Hau Hanspeter HEAT RESISTANT POLVOMETALURGICO STEEL AND PROCEDURE FOR MANUFACTURING.
AT411580B (en) * 2001-04-11 2004-03-25 Boehler Edelstahl METHOD FOR THE POWDER METALLURGICAL PRODUCTION OF OBJECTS
EP2570507A1 (en) * 2011-09-19 2013-03-20 Sandvik Intellectual Property AB A method for producing high speed steel
EP2933345A1 (en) * 2014-04-14 2015-10-21 Uddeholms AB Cold work tool steel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3117863A (en) * 1960-11-14 1964-01-14 Vanadium Alloys Steel Co Alloy steels
US4249945A (en) * 1978-09-20 1981-02-10 Crucible Inc. Powder-metallurgy steel article with high vanadium-carbide content
US4276087A (en) * 1979-05-03 1981-06-30 Crucible Inc. Powder-metallurgy vanadium-containing tungsten-type high-speed steel
JPS57181367A (en) * 1981-04-08 1982-11-08 Furukawa Electric Co Ltd:The Sintered high-v high-speed steel and its production
US4880461A (en) * 1985-08-18 1989-11-14 Hitachi Metals, Ltd. Super hard high-speed tool steel

Also Published As

Publication number Publication date
EP0467857A1 (en) 1992-01-22
IT9048150A0 (en) 1990-07-17
ES2085457T3 (en) 1996-06-01
DE69117605D1 (en) 1996-04-11
ATE135056T1 (en) 1996-03-15
DE69117605T2 (en) 1996-09-26
IT9048150A1 (en) 1992-01-17
EP0467857B1 (en) 1996-03-06
IT1241490B (en) 1994-01-17
GR3019999T3 (en) 1996-08-31

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