请参考这个联接

来源: 于 2010-04-05 20:32:35 [旧帖] [给我悄悄话] 本文已被阅读：次

http://www.navaching.com/forge/heat.html

"In the tempering-range, color is the result of oxides formed on the surface of the steel. "

>60度你就会觉得炀. 发红时的温度~530度,对钢的强度没有影响.