不同热处理制度下1Cr11Ni2W2MoV闪光对焊接头的组织与性能

摘要

Flash butt welding experiments of 1Cr1 1Ni2W2MoV stainless steel are carried out,and then the microstructure and properties of the welded joints with different postweld heat treatments are studied.The results show that flash butt welding is suitable for 1Cr11Ni2W2MoV and can gain the high quality welded joints.The microstructures of flash butt welds of 1Cr1 1Ni2W2MoV are martensite and a small quantity of δ-ferrite,and the welded joints have better tensile property and worse plasticity and impact toughness.After quenching and temper heat treatment,the microstructure is tempered sorbite,and the tensile strength,plasticity and impact toughness of the welded joints are improved.In the condition of quenching at 1 000 ℃ and temper at 570 ℃,the welded joints have excellent integrated mechanical properties.%针对1Cr 11Ni2W2MoV不锈钢开展闪光对焊试验,研究不同焊后热处理制度对其焊接接头组织和力学性能的影响.结果表明:采用闪光对焊方法焊接1Cr 11Ni2W2MoV,能够获得优质的焊接接头.1Cr1 1Ni2W2MoV闪光焊焊态下焊缝组织为马氏体和少量的δ铁素体组织,焊接接头具有较好的拉伸性能,但塑性和韧性较差.经过淬火+回火热处理后组织袁现为回火索氏体组织,焊接接头的抗拉强度、塑性和韧性等性能均得到改善.在1000℃油淬+570℃回火状态下,焊接接头具有良好的综合力学性能.