JPS6447836A - High hardness and high speed sintered steel ingot having excellent hot workability - Google Patents

High hardness and high speed sintered steel ingot having excellent hot workability

Info

Publication number
JPS6447836A
JPS6447836A JP20489687A JP20489687A JPS6447836A JP S6447836 A JPS6447836 A JP S6447836A JP 20489687 A JP20489687 A JP 20489687A JP 20489687 A JP20489687 A JP 20489687A JP S6447836 A JPS6447836 A JP S6447836A
Authority
JP
Japan
Prior art keywords
steel
steel ingot
hot workability
high speed
inequalities
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
JP20489687A
Other languages
Japanese (ja)
Other versions
JPH0674486B2 (en
Inventor
Minoru Hirano
Yukito Imaike
Tatsumi Kawama
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP20489687A priority Critical patent/JPH0674486B2/en
Publication of JPS6447836A publication Critical patent/JPS6447836A/en
Publication of JPH0674486B2 publication Critical patent/JPH0674486B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Powder Metallurgy (AREA)

Abstract

PURPOSE:To particularly improve the end mill cuttability, hot workability and hardness of the titled steel ingot by regulating the compositional limiting value of C, N, W, Mo, V, Co, etc., the conditions in the process and the size of primary carbide. CONSTITUTION:The steel contg., by weight, 1.49-1.90% C, 3-5% Cr, 11.5-13.0% W, 3-5% Mo (where 19-21% W+2Mo), 4-5% V and 7-12% Co, furthermore contg. C and N amounts satisfying the inequalities and consisting of the balance iron with inevitable impurities is used. In the inequalities, Ceq=0.19+0.017 (W+2Mo)+0.22V is furthermore regulated. At the time of forming said steel into a high speed sintered steel ingot by powder metallurgy, the steel is formed into quench solidified steel powder by gas atomizing with N2, etc., and is subjected to compression molding by a hot isostatic pressing method to produce the steel ingot (sintered products) having true density. In this case, the average size of primary carbide in the steel ingot must be regulated to <=3mum. Said steel ingot has excellent hot workability, etc., and is suitable for the production of tools by hot rolling, forging, etc., having a thin diameter.
JP20489687A 1987-08-18 1987-08-18 High hardness sintered high speed steel ingot with excellent hot workability Expired - Fee Related JPH0674486B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20489687A JPH0674486B2 (en) 1987-08-18 1987-08-18 High hardness sintered high speed steel ingot with excellent hot workability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20489687A JPH0674486B2 (en) 1987-08-18 1987-08-18 High hardness sintered high speed steel ingot with excellent hot workability

Publications (2)

Publication Number Publication Date
JPS6447836A true JPS6447836A (en) 1989-02-22
JPH0674486B2 JPH0674486B2 (en) 1994-09-21

Family

ID=16498194

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20489687A Expired - Fee Related JPH0674486B2 (en) 1987-08-18 1987-08-18 High hardness sintered high speed steel ingot with excellent hot workability

Country Status (1)

Country Link
JP (1) JPH0674486B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01119645A (en) * 1987-10-30 1989-05-11 Daido Steel Co Ltd Powdery high-speed steel
JPH02175846A (en) * 1988-12-27 1990-07-09 Daido Steel Co Ltd Powder high-speed tool steel
JPH02182867A (en) * 1989-01-06 1990-07-17 Daido Steel Co Ltd Powdered tool steel
US5684328A (en) * 1992-07-29 1997-11-04 Samsung Electronics Co., Ltd. Semiconductor chip package using improved tape mounting

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01119645A (en) * 1987-10-30 1989-05-11 Daido Steel Co Ltd Powdery high-speed steel
JPH02175846A (en) * 1988-12-27 1990-07-09 Daido Steel Co Ltd Powder high-speed tool steel
JPH02182867A (en) * 1989-01-06 1990-07-17 Daido Steel Co Ltd Powdered tool steel
US5684328A (en) * 1992-07-29 1997-11-04 Samsung Electronics Co., Ltd. Semiconductor chip package using improved tape mounting

Also Published As

Publication number Publication date
JPH0674486B2 (en) 1994-09-21

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees