热处理对超(超)临界材料组织性能的影响

Study on the Effects of Heat Treatment on Structure and Properties of Ultra-supercritical Materials

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。

This thesis is to study on heat treatment procedures,mechanical properties and structures of test materials using ultra-supercritical heat-resistant materials of 2Cr11Mo1VNbN and 10Cr9W2MoVNbNB and 1Cr11Co3W3NiMoVNbNB.The experiment identifies the most suitable heat treatment process parameters for tested materials,and shows that the optima heat treatment parameters for materials 2Cr11Mo1VNbN and 10Cr9W2MoVNbNB are quenching in 1 060～1 080 ℃ then tempering at the temperature of 660～680 ℃ and for 1Cr11Co3W3NiMoVNbNB are quenching in 1 080～1 100 ℃ then tempering at the temperature of 680～700 ℃ and the structures of tested three materials are in tempered martensite.Furthermore,the thesis identifies the relationship between the strength and toughness of these materials after the heat treatment.