Since the carbon content of these steels is so high, parts made from high carbon steel are normally difficult to machine and weld.
由于碳在这类钢中的含量很高，用高碳钢制作的零件通常很难被加工和焊接。
A steel with varying carbon content and, consequently, different critical temperatures requires a special heat treatment.
含碳量变化的钢具有不同的临界温度，因此需要特殊的热处理。
Steel with low carbon content will not respond appreciably to hardening treatment.
含碳量低的钢对淬火处理没有明显的反应。
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