论文部分内容阅读
针对马氏体耐热钢 10Cr9Mo1VNbN和珠光体耐热钢 12Cr1MoV ,采用TGS -9cb、H10Cr5Mo、TR31三种焊丝形成高、中、低匹配焊接接头 ,利用脉冲电流氩弧焊、高温加速模拟工况、力学性能试验及电子显微分析 ,研究了 10Cr9Mo1VNbN/ 12Cr1MoV异种钢焊接接头的力学性能、高温强度、界面蠕变损伤及失效特征。试验结果表明 ,焊前预热 2 5 0℃ ,焊后回火 75 0℃× 1h ,加速模拟运行 5 0 0h后 ,高匹配和中匹配接头的力学性能劣化明显 ,界面蠕变损伤及失效倾向较大 ;而低匹配接头的力学性能优于高匹配和中匹配接头 ,界面蠕变损伤较轻 ,失效倾向较小。因此 ,选用TR31焊丝作为10Cr9Mo1VNbN/ 12Cr1MoV异种钢焊接接头的填充材料较为合适。
Aiming at martensite heat resistant steel 10Cr9Mo1VNbN and pearlite heat resistant steel 12Cr1MoV, TGS-9cb, H10Cr5Mo and TR31 three kinds of welding wire were used to form high, medium and low matched welding joints. By pulse current welding, Mechanical properties test and electron microscopy analysis of 10Cr9Mo1VNbN / 12Cr1MoV dissimilar steel welded joints of the mechanical properties, high temperature strength, creep damage and interface characteristics. The experimental results show that the mechanical properties of the high-matching and medium-matching joints are obviously deteriorated, and the interfacial creep damage and failure tendencies are obvious after preheating 250 ℃ and post-welding tempering 75 0 ℃ × 1h and accelerated simulating 500h While the mechanical properties of the low matching connector are better than those of the high matching and middle matching connector. The interface creep damage is lighter and the failure tendency is smaller. Therefore, the selection of TR31 wire as 10Cr9Mo1VNbN / 12Cr1MoV dissimilar steel welded joints filler material is more appropriate.