| 摘要 |
<p>A process for treating an article (10) of metal containing material, the process in including subjecting the article (10) to a deep cryogenic treatment at a temperature of -300 °F or lower, subjecting the article (10) to at most a partial tempering treatment, and then nitriding a surface of the article (10) so as to form nitrides near a surface of the article (10).</p> |
