C - Chemistry – Metallurgy – 21 – D
Patent
C - Chemistry, Metallurgy
21
D
148/34.2
C21D 1/18 (2006.01) B23P 25/00 (2006.01) C21D 1/32 (2006.01)
Patent
CA 1077378
ABSTRACT OF THE DISCLOSURE The invention provides a method of working steel machine parts, and it relates to a composite technique consisting of machining and heat-treatment, which makes use of the fact that at temperatures in the vicinity of or above the Ms point during quench cooling, the structure of steel assumes a state of supercooled austenite or a portion thereof assumes a state of martensite transformation or beinite transformation, suitable for machining, and in such state desired machining is applied to steel machine parts, which are then cooled to room temperature for hardening. Other merits and details will be made clear.
248852
Fujioka Yasuo
Tani Hajime
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