Stainless steel for anti-friction bearing and method of making
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United States of America Patent
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Dec 1, 1998
Grant Date -
N/A
app pub date -
Dec 19, 1996
filing date -
Dec 29, 1995
priority date (Note) -
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Abstract
To provide a stainless steel for anti-friction bearings, which is obtained by making its eutectic carbide contents finer in particle diameter and suppressing the generation of non-metallic substances to an extremely low level, thus having a homogenious and dense structure and permitting highly accurate machining. The provided stainless steel is composed of 0.60 to 0.75% of carbon, 10.5 to 13.5% of chromium, 1.0% or below of silicon and 0.3 to 0.8% of manganese, % being by weight, the remainder of the composition being iron and inevitably introduced impurities, has a hardness of HRC 58 or above, contains eutectic carbide particles of 10 .mu.m and below in diameter, and has oxygen and titanium concentrations each of 10 ppm or below.
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