H65黄铜厚板旋转压力焊焊接接头的组织和性能分析  

Microstructure and Properties of Welded Joints of H65 B rass T hick P late b y Rotary Pressure Welding

作　　者：杜善豪 刘嘉靖 钱高祥 赖士浩 郑弋明 吴青华 刘德华[3] 张宇博[1] DU Shanhao;LIU Jiajing;QIAN Gaoxiang;LAI Shihao;ZHENG Yiming;WU Qinghua;LIU Dehua;ZHANG Yubo(School of Materials Science and Engineering,Dalian University of Technology,Dalian 116000,China;Yuntai Copper Co.,LTD.,Yingtan 335000,China;School of Mechanical Engineering,Dalian University of Technol-ogy,Dalian 116000,China)

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116000 [2]江西云泰铜业有限公司,江西鹰潭335000 [3]大连理工大学机械学院,辽宁大连116000

出　　处：《铜业工程》2023年第6期62-69,共8页Copper Engineering

基　　金：国家自然科学基金项目(52171135)资助。

摘　　要：对H65黄铜厚板材旋转压力焊过程中搅拌头旋转速度对焊接质量的影响进行了研究与分析,所选用的旋转速度分别为600,800,1000r/min。研究过程中通过光学显微镜(OM)、扫描电镜(SEM)对H65黄铜合金旋转压力接头区域的微观组织进行观察,并检测接头区域的力学性能。结果表明:旋转压力焊工艺能够有效连接H65黄铜大尺寸厚板材,接头区无明显裂纹,但其微观组织中存在少量气孔,且随旋转速度的增加逐渐减少;接头区域的H65黄铜晶粒明显细化,随旋转速度的增加β相占比减少,有效提升了接头区域的塑性;当搅拌头旋转速度为1000r/min时,H65黄铜连接效果最好,接头的拉伸强度为348MPa,延伸率为48.4%,断口呈韧性断裂。In this paper,the influence of rotating speed of stirring head on the welding quality of H65 brass rotary pressure welding(RPW)process is studied.The rotating speed is set as 600 r/min,800 r/min and 1000 r/min respectively.The microstructure evolution is observed by optical microscope(OM)and scanning electron microscope(SEM),and the mechanical properties of the joint are tested as well.The results show that the H65 brass can be effectively connected by RPW process.There are no obvious cracks at the joint re‐gion,but some pores in the microstructure,which gradually decrease with the increase of the rotation speed.At the same time,the obvi‐ous grain refinement of the H65 brass is found in the joint region,and theβphase proportion decreases with the increase of rotation speed,which effectively improves the plasticity of the joint region.When the rotating speed of the stirring head is 1000 r/min,H65 brass connection has the best effect.The tensile strength of the joint is 348 MPa,the elongation is 48.4%and the fracture is ductile.

关 键 词：黄铜厚板 旋转压力焊 机械性能 微观组织 塑性 

分 类 号：TG453.9[金属学及工艺—焊接]