淬回火温度对热作模具钢4Cr5MoSiV组织和硬度的影响
Effect of Quenching and Tempering Temprature on Microstructure and Hardness of Hot Working Die Steel 4Cr5MoSiV
摘 要
利用金相显微镜和洛氏硬度计对4Cr5MoSiV钢淬火和回火后的组织、硬度进行了观察与分析。结果表明：在1 040，1 060℃淬火时碳化物未完全固溶到奥氏体中，随淬火温度升高马氏体组织变得更加粗大；硬度随淬火温度的升高先增加再降低，在1 100℃达到最高值56.5 HRC；晶粒度则随淬火温度升高逐渐降低；碳化物在奥氏体中的溶解程度对马氏体转变后的硬度有较大影响；经1 050℃和1 100℃淬火并在490~650℃之间进行回火后，得到了不同的组织，析出不同类型的碳化物，多以M23C6、M6C为主，这些碳化物显著提高了回火后的硬度。
回火
组织
4Cr5MoSiV钢
quenching
tempering
microstructure
4Cr5MoSiV steel
Abstract
Microstructure and hardness of 4Cr5MoSiV steel quenching and tempering have been observed and analysed by metallographic microscope and the hardness tester. The result show that, carbides of 1 040℃, 1 060℃ quenching were not completely dissolved in austenite, martensite microstructure becomed thicker increases with the quenching temperature; Hardness increased first and then decreased with temperature raised, maximumvalue was 56.5 HRC at 1 100℃; Grain size decreased gradually with the increased of temperature. The solubility of carbides in autenite had a great effect on the hardness of martensite transformation. Tempering was at the range of 490℃-560℃ after 1050℃ and 1 100℃ quenching, obtained different microstructure, and many types of carbides were precipitated in the tempering microstructure, mainly including M23C6 and M6C, tempering hardness wasobviously improved by those carbides of microstructure.
中图分类号 TG142.45
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备注刘明(1987-),硕士,工程师,从事模具材料研发
引用该论文: LIU Ming,YUE Caichao,FENG Shuling,MU Feng. Effect of Quenching and Tempering Temprature on Microstructure and Hardness of Hot Working Die Steel 4Cr5MoSiV[J]. Materials for mechancial engineering, 2017, 41(Z2): 67～70
刘明,岳彩超,冯淑玲,牟风. 淬回火温度对热作模具钢4Cr5MoSiV组织和硬度的影响[J]. 机械工程材料, 2017, 41(Z2): 67～70
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参考文献
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