FREE-CUTTING STAINLESS-STEEL MATERIAL FOR PRECISION PROCESSING AND PROCESS FOR PRODUCING SAME

WIPO Patent Application WO/2011/135897

A1

Provided are a free-cutting stainless-steel material for precision processing which can satisfy all of excellent cutting precision, cuttability, corrosion resistance, and environmental preservation at the same time and a process for producing the stainless-steel material. The free-cutting stainless-steel material for precision processing is a material to be formed by cutting on the order of micrometer, and is characterized by containing a material for imparting cutting workability which is constituted of h-BN grains and has been dispersed as primary particles in the steel. The process for producing a free-cutting stainless-steel material for precision processing is characterized by heating a free-cutting stainless-steel material for precision processing in which h-BN grains have been precipitated, thereafter quenching the material to eliminate the h-BN grains through formation of a solid solution thereof, and then tempering the material to thereby precipitate h-BN grains again which are evenly dispersed in the material.

EMURA SATOSHI (JP)
YAMAMOTO SHIGEO (JP)
SAKURAYA KAZUYUKI (JP)
TSUZAKI KANEAKI (JP)

PCT/JP2011/053330

November 03, 2011

February 17, 2011

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NAT INST FOR MATERIALS SCIENCE (JP)
EMURA SATOSHI (JP)
YAMAMOTO SHIGEO (JP)
SAKURAYA KAZUYUKI (JP)
TSUZAKI KANEAKI (JP)

C22C38/00; C21C7/00; C21C7/04; C21C7/072; C21C7/10; C21D6/00; C22C38/54

WO2008016158A1	2008-02-07
WO2008016158A1	2008-02-07

JP2006291296A	2006-10-26
JP2004332021A	2004-11-25
JP2002038238A	2002-02-06
JP2001234298A	2001-08-28

See also references of EP 2565286A4

NAKAGAWA KUNIO (JP)
Kunio Nakagawa (JP)

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