机械工程材料 钢的渗碳 ( Carburize of steel ) 渗碳:将工件置于富碳的介质中,加热到高温(900~ 950℃),使碳原子渗入表层的过程。
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在解决该问题的过程中,提出了一个临界冷却速度的概念,对钢的渗碳及其后热处理有重要的指导意。
A concept of critical cooling rate given in this paper for carburizing and post heat treatment of steel.
高于此点,由于超过共析点钢完全由珠光体和退火状态的渗碳体组成,硬度增加并不多。
Above this point the hardness can be increased only slightly, because steels above the eutectoid point are made up entirely of pearlite and cementite in the annealed state.
不透钢的返修,应尽量采用间歇和分段气刨,以减少热量输入,并彻底清除渗碳层,露出金属光泽后方可焊接。
For the repair of stainless steel, to reduce heat energy and clean completely, gouging should in discontinuous way.
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