焊后处理对Q690钢接头组织及性能的影响  

Effect of Post-weld Treatment on Microstructure and Properties of Q690 Steel Joints

作　　者：杜全斌 张肇伟 张黎燕[1] 刘春鹏 Du Quanbin;Zhang Zhaowei;Zhang Liyan;Liu Chunpeng(Henan Key Laboratory of Intelligent Manufacturing Equipment Integration for Superhard Materials,Henan Mechanical and Electrical Vocational College,Zhengzhou 451191,China)

机构地区：[1]河南机电职业学院河南省超硬材料智能制造装备集成重点实验室,郑州451191

出　　处：《煤矿机械》2020年第3期101-103,共3页Coal Mine Machinery

基　　金：河南省2019年科技公关项目(192102210059);河南省2019年科技公关项目(192102210060);河南省高等学校重点科研项目(20B460005)。

摘　　要：为考查不同地域、不同季节焊态下Q690钢焊接接头的组织及性能,采用干冰急冷、自然冷却和250℃×2 h低温回火3种方式对焊接接头进行焊后处理。利用光学显微镜、透射电镜,通过拉伸试验、显微硬度试验及冲击试验,研究了3种焊后处理对Q690钢接头组织及性能的影响。In order to investigate the microstructure and properties of welded joints of Q690 steel in different regions and seasons,dry-ice quenching,natural cooling and low temperature tempering at 250℃×2 h were used to post-weld the joints.The effects of three post-weld treatments on the microstructure and properties of Q690 steel joints were studied by means of optical microscopy,transmission electron microscopy,tensile test,microhardness test and impact test.

关 键 词：Q690钢 显微组织 冲击韧性 抗拉强度 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG441.8[金属学及工艺—金属材料]