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选用2Cr11Mo1VNbN、10Cr9W2MoVNbNB1、Cr11Co3W3NiMoVNbNB 3种超(超)临界机组耐热材料,进行热处理工艺、力学性能、金相组织研究。通过实验确定了3种材料最合适的热处理工艺参数:2Cr11Mo1VNbN、10Cr9W2MoVNbNB钢的最佳淬火、回火温度分别为1 060~1 080℃、660~680℃;1Cr11Co3W3NiMoVNbNB钢的最佳淬火、回火温度分别为1 080~1 100℃、680~700℃;观察分析发现,3种钢在1 080℃淬火、680℃左右回火的组织均为回火马氏体;找出了材料热处理后的强度与冲击韧度之间的关系。
Three kinds of ultra-supercritical heat-resistant materials (2Cr11Mo1VNbN, 10Cr9W2MoVNbNB1, Cr11Co3W3NiMoVNbNB) were selected for heat treatment, mechanical properties and microstructure research. The optimal quenching parameters of 2Cr11Mo1VNbN and 10Cr9W2MoVNbNB steel were determined by experiments. The optimum tempering temperatures for the steels are 1 060 ~ 1 080 ℃ and 660 ~ 680 ℃, respectively. The optimum quenching temperature and tempering temperature for 1Cr11Co3W3NiMoVNbNB steel are Respectively 1 080 ~ 1 100 ℃, 680 ~ 700 ℃; observation and analysis found that the three kinds of steel quenched at 1 080 ℃, tempered martensite at about 680 ℃ were tempered martensite; found the strength of the material after heat treatment And the impact toughness of the relationship between.