Cr12型冷作模具钢热处理工艺及性能分析
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摘要
实验室对Cr12、Cr12MoV、Cr12Mo1V1进行不同热处理工艺对硬度和冲击韧性影响试验,并用光学显微镜对显微组织和共晶碳化物不均匀性进行对比分析。试验结果表明,Cr12、Cr12MoV、Cr12Mo1V1最佳淬火加热温度分别为920~960℃、980~1 020℃、1 020~1 060℃,经低温回火后硬度为62.5 HRC~63 HRC,纵向冲击功分别约为15、30、40 J。可见,Cr12、Cr12MoV、Cr12Mo1V1高硬、高耐磨性相当;冲击韧性Cr12Mo1V1最好,其次为Cr12MoV,Cr12最差;共晶碳化物不均匀性Cr12最差,Cr12MoV和Cr12Mo1V1水平相当且好于Cr12。
The influences of the different heat treatment processes on the hardness and impact toughness of Cr12,Cr12MoV and Cr12Mo1 V1 were tested in the laboratory. The microstructure and eutectic carbide inhomogeneity were analyzed by microscope. The experiment results showed that the best quenching temperature of Cr12,Cr12MoV and Cr12Mo1V1 was 920-960 ℃,980-1 020 ℃ and 1 020-1 060 ℃,respectively. After tempering at the low temperature the hardness was 62.5-63 HRC and the longitudinal impact energy was 15 J,30 J and 40 J,respectively. It proved that Cr12,Cr12MoV and Cr12Mo1 V1 had similar high hardness and high wear resistance.The impact toughness of Cr12Mo1V1 was the best,and the toughness of Cr12MoV was better than Cr12,the carbide inhomogeneity of Cr12was worse than Cr12MoV and Cr12Mo1V1.
The influences of the different heat treatment processes on the hardness and impact toughness of Cr12,Cr12MoV and Cr12Mo1 V1 were tested in the laboratory. The microstructure and eutectic carbide inhomogeneity were analyzed by microscope. The experiment results showed that the best quenching temperature of Cr12,Cr12MoV and Cr12Mo1V1 was 920-960 ℃,980-1 020 ℃ and 1 020-1 060 ℃,respectively. After tempering at the low temperature the hardness was 62.5-63 HRC and the longitudinal impact energy was 15 J,30 J and 40 J,respectively. It proved that Cr12,Cr12MoV and Cr12Mo1 V1 had similar high hardness and high wear resistance.The impact toughness of Cr12Mo1V1 was the best,and the toughness of Cr12MoV was better than Cr12,the carbide inhomogeneity of Cr12was worse than Cr12MoV and Cr12Mo1V1.
引文
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[2]魏兴钊,朱伟恒.Cr12型钢制冷作模具的失效分析与探讨[J].金属热处理,2011,36(1):14.
[3]吴晓峰,马坤.Cr12Mo V模具钢应用的主要问题与热处理研究进展[J].模具工业,2009,35(9):55.
[4]李晨辉,谢尘.国内外Cr12型模具钢组织和性能对比[J].材料热处理学报,2012,33(6):47.
[5]魏兴钊,朱伟恒.Cr12型钢制冷作模具的失效分析与探讨[J].金属热处理,2011,36(1):15.
[6]邹安全,邓芬燕.Cr12Mo V模具钢热处理工艺试验研究[J].模具工业,2001,12(11):55.
[7]刘骏曦,邓莉萍.Cr12Mo V钢的热处理及组织、性能研究[J].热加工工艺,2012,41(14):189.
[8]崔忠圻.金属学与热处理[M].北京:机械工业出版社,2001.
[9]冷艳,黄维刚.热处理工艺对Cr12Mo V钢组织、硬度及耐磨性的影响[J].四川冶金,2010,32(1):10.
[10]邹安全.改善Cr12钢不均匀性碳化物分布的热处理工艺研究[J].中国机械工程,2005,16(7):646.