n.硬化法(增加硬度；淬火；滲碳；鍛煉)

動詞harden的現(xiàn)在分詞形式.

So we find that hardening operation is made up of heating and quenching. 因此我們發(fā)現(xiàn)淬火工序包括加熱和淬硬兩個(gè)步驟。

The maximum degree of hardness obtainable in steel by direct hardening is determined largely by the carbon content. 直接淬火后的剛所能獲得的最大硬度在很大程度上時(shí)由含碳量決定的。

The Super carburization process can provide outstanding performance in the surface hardening of high-alloyed steel. 過滲碳處理可以有效提升高合金工具鋼的表面特性。