热处理：钢及有色金属的常规热处理与化学热处理，钢的淬透性测试，钢的表面处理等。
Heat processing: normal heat treating and chemical heat treating of steel and nonferrous metal; testing the hardenability of steel; surface treatment of steel.
加入镍和铜，钢的淬透性提高，硬度增加；
The addition of Nickel and Copper improves the hardenability and the baldness.
在此基础上对钢的淬透性影响因素、晶粒细化及非金属夹杂物控制等进行了详细研究。
On the basis of the above, gear steel's hardenability, grain refinement and nonmetal inclusion control elaborate have been discussed.
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