1·With high strength, high toughness and good hardenability.
具有高强度、高韧性和良好的淬透性。
2·The addition of Nickel and Copper improves the hardenability and the baldness.
加入镍和铜，钢的淬透性提高，硬度增加；
3·Heat processing: normal heat treating and chemical heat treating of steel and nonferrous metal; testing the hardenability of steel; surface treatment of steel.
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。
4·The characteristics of boron element and its effect in cast steel are introduced. Microamount boron can improve the hardenability and toughness of carbon steel.
介绍了硼元素的特点及其在钢中的作用，微量硼可以明显改善钢的淬透性和韧性。
5·Conversely, according to the demand of hardening depth of a certain diameter of steel sphere, a steel kind of suitable hardenability can be selected.
反之，也可根据对某一直径钢球的淬硬层深度的要求，选择具有适当淬透性的钢种。