Title:
HIGH HARDNESS AND HIGH TOUGHNESS NITRIDED POWDER HIGH SPEED STEEL
Document Type and Number:
Japanese Patent JPS616255
Kind Code:
A
Abstract:
PURPOSE: To obtain a high hardness and high toughness nitrided powder high speed steel by incorporating specified ratios of C, Cr, Mo, W, V, Co, N to Fe.
CONSTITUTION: The intrided powder high speed steel consisting of, by weight, C content (%) satisfying a formula Ccq+0.15≤C+12/14N≤Ccq+0.35, [Ccq=0.19+ 0.017(W+2Mo)+0.22V, and N, W, Mo, V are contents respectively in steel], 3W5% Cr, 8W12% Mo, 8W14% W, 4W6% V, 5W15% Co, 0.2W1.2% N, and the balance FE substantially, and 27W32% (W+2Mo) is prepred. The nitride powder high speed steel has ≥ about 70HRC hardness approximated to that of sintered hard alloy, and high toughness of ≥ about 260kg/mm2 deflective strength.
Inventors:
KAWAI NOBUYASU
HIRANO MINORU
YOROZUDO HIROMUNE
ENOSAKA HAJIME
FUJIMOTO HIROFUMI
HIRANO MINORU
YOROZUDO HIROMUNE
ENOSAKA HAJIME
FUJIMOTO HIROFUMI
Application Number:
JP12828884A
Publication Date:
January 11, 1986
Filing Date:
June 20, 1984
Export Citation:
Assignee:
KOBE STEEL LTD
International Classes:
B22F9/08; C22C33/02; C22C38/00; (IPC1-7): C22C33/02; C22C38/30
Domestic Patent References:
| JPS5785952A | 1982-05-28 | |||
| JPS54116318A | 1979-09-10 | |||
| JPS605855A | 1985-01-12 |
Attorney, Agent or Firm:
Toshio Yasuda
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