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。
There are some characteristics in the machine, for example, new structure, high rigidity, improves the steel tube's hardenability ect.
该设备具有结构新颖、刚度好、对钢管的淬透性好等特点。
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