Method of making a hardened steel part, especially a roll load-bearing steel part
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United States of America Patent
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Jun 17, 2008
Grant Date -
Jun 10, 2004
app pub date -
Oct 7, 2003
filing date -
Oct 10, 2002
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Abstract
The method of making a hardened steel part or component includes making a semi-finished article of air-hardened steel; cold-forming the semi-finished article into a finished-shape part or component with a desired or predetermined finished shape and then hardening the finished-shape part or component with the finished shape by a heat treating process. The air-hardened steel particularly preferably contains about 0.67% by weight carbon, about 1.50 % by weight silicon, about 1.50% by weight manganese, about 1.00% by weight chromium, about 0.10% by weight nickel, about 0.25% by weight molybdenum, and a balance or remaining portion of iron with standard impurities.
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