Reinforced durable steel, method for the production thereof,...

Details Reinforced durable steel, method for the production thereof,... Reinforced durable steel, method for the production thereof,...

2002-04-16

2008-11-04

Yee, Deborah (Department: 1793)

Alloys or metallic compositions

Ferrous

One percent or more carbon containing, but less than 1.7...

C420S102000, C420S068000, C420S069000, C420S109000, C420S110000, C420S111000, C420S129000, C148S326000, C148S328000, C148S334000, C148S335000, C148S540000, C148S542000, C148S546000, C148S547000

Reexamination Certificate

active

07445750

ABSTRACT:
The invention relates to a tool steel, the composition of which comprises (the percentages being expressed in % by weight):0.8≦C≦1.55.0≦Cr≦140.2≦Mn≦3Ni≦5V≦1Nb≦0.1Si + Al≦2Cu≦1S≦0.3Ca≦0.1Se≦0.1Te≦0.11.0≦Mo + ½W≦40.06≦Ti + ½Zr≦0.150.004≦N≦0.02the balance of the composition consisting of iron and impurities resulting from the smelting, it being furthermore understood that: 2.5×10−4%2≦(Ti+½Zr)×N, to a process for manufacturing parts made in this steel and to the parts obtained.

REFERENCES:
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English translation of Japanese patent 57143468, Fukui, Shoichi et al., Sep. 4, 1982.
Patent Abstracts of Japan, vol. 2000, No. 10, Nov. 17, 200 & JP 2000 192195 (DAIDO Steel Co., Ltd.), Jul. 1, 2000.
Patent Abstracts of Japan, vol. 015, No. 216 (C-0837), Jun. 4, 1991 & JP 03 064429 A. (DAIDO Steel Co., Ltd.), Mar. 19, 1991.
Patent Abstracts of Japan, vol. 017, No. 554 (C-1118), Oct. 6, 1993 & JP 05 156407 A. (Hitachi Metals, Ltd.), Jun. 22, 1993.

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