NON-HEAT-TREATED STEEL FOR SOFT NITRIDING, AND SOFT-NITRIDED COMPONENT

WIPO Patent Application WO/2012/070349

A1

The present invention provides: a soft-nitrided component which, even when having been produced through water cooling after soft nitriding, has a flex fatigue strength of 600 MPa or higher and excellent straightenability; and a non-heat-treated steel for soft nitriding, which is suitable for use as a raw material for the soft-nitrided component. The non-heat-treated steel for soft nitriding has a chemical composition that contains 0.25-0.35%, excluding 0.35%, C, 0.15-0.35% Si, 0.85-1.20% Mn, up to 0.10% S, 0.010-0.030%, excluding 0.010%, Al, 0.003-0.020% Ti, and 0.010-0.020% N, with the remainder comprising Fe and impurities, in which P ≤0.08% and Cr≤0.10%, and that satisfies 0.02C+0.22Mn+0.87Cr+0.85Al+0.72≥0.96 and 2.40C-0.54Mn-9.26Cr-0.01Al+1.59≥0.90.

JPH09122970	WELDING WIRE HAVING HIGH WELD CRACK RESISTANCE AND WELDING METHOD USING THE SAME
JPH08302446	HIGH STRENGTH HOT ROLLED STEEL SHEET EXCELLENT IN FATIGUE CHARACTERISTIC IN SHEARED PART

NISHITANI SHIGEFUMI (JP)
TAKASUGA MOTOKI (JP)
MATSUMOTO HITOSHI (JP)
YUYA MASATO (JP)
TANIYAMA AKIRA (JP)
SANO NAOYUKI (JP)
EGASHIRA MAKOTO (JP)
TAKAHASHI HIROMASA (JP)
SAITO ISAMU (JP)

PCT/JP2011/074645

May 31, 2012

October 26, 2011

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SUMITOMO METAL IND (JP)
HONDA MOTOR CO LTD (JP)
NISHITANI SHIGEFUMI (JP)
TAKASUGA MOTOKI (JP)
MATSUMOTO HITOSHI (JP)
YUYA MASATO (JP)
TANIYAMA AKIRA (JP)
SANO NAOYUKI (JP)
EGASHIRA MAKOTO (JP)
TAKAHASHI HIROMASA (JP)
SAITO ISAMU (JP)

C22C38/00; C22C38/60; C21D1/06; C21D8/06; C21D9/30

JP2002226939A	2002-08-14
JPH1162943A	1999-03-05
JP2000008141A	2000-01-11
JP2010090457A	2010-04-22

SUGIOKA, Kanji et al. (JP)
Sugioka Miki 2 (JP)

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