冷处理对合金结构钢力学性能的影响
Influence of Cryogenic Treatment on Mechanical Properties of Alloy Structure Steel
葛凯晨, 卢 军, 马佳明, 张洁云
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作者单位：上海市机械制造工艺研究所有限公司, 上海 200070
中文关键字：42CrMo钢； 40CrNiMo钢； 冷处理； 力学性能； 冲击吸收功
英文关键字：42CrMo steel; 40CrNiMo steel; cryogenic treatment; mechanical property; impact absorbing energy
中文摘要：研究了冷处理对42CrMo钢和40CrNiMo钢显微组织及力学性能的影响。结果表明，冷处理并不能明显改善钢的显微组织或提高钢的常温力学性能，但能显著提高钢的低温(-40 ℃)冲击吸收功。本实验条件下，42CrMo钢和40CrNiMo钢经860 ℃淬火后，进行-70 ℃冷处理，最后在590 ℃回火，其低温冲击吸收功最佳。
英文摘要：The effects of cryogenic treatment on microstructure and mechanical properties of 42CrMo steel and 40CrNiMo steel were investigated. The results show that through cryogenic treatment, the microstructure and the mechanical properties at normal temperature can't be further improved, but the impact absorbing energy at -40 ℃increases. On this experiment condition, the preferable impact absorbing energy at low temperature can be obtained after quenching at 860 ℃+ cryogenic treated at -70 ℃ and tempered at 590 ℃.