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1.The results show that good hardenability and the ability of harden quenching appear when Mn content is about 4%～5%.
结果表明,含锰4%～5%的硼白口铸铁具有较好的淬透性和淬硬性。收藏指正
2.To harden the surface or case of(iron or steel) by high-temperature shallow infusion of carbon followed by quenching.
表面渗碳硬化法通过高温条件下对碳的浅层注入并紧接冷却来使（铁或钢的）表面或外壳硬化收藏指正
3.The effect of processing parameters such as carbon potential, carbonizing temperature, quenching temperature on the rules of effective harden layer, microstructure, interior rigidity, distribution of hardness and carbon concentration were studied.
研究了20CrMoH 汽车齿轮用钢在连续渗碳生产线不同区域渗碳过程的碳势、渗碳温度、淬火温度等工艺参数对有效硬化层、显微组织、表面硬度、心部硬度以及碳浓度分布和渗碳层硬度分布的影响规律。收藏指正
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