TA18钛合金管惯性摩擦焊接头组织与性能  

Microstructure and properties of inertia friction welding joint of TA18 titanium alloy tube

作　　者：成培鑫 席锦会 刘姣 石立超 张健健 Cheng Peixin;Xi Jinhui;Liu Jiao;Shi Lichao;Zhang Jianjian(Western Metal Materials Co.,Ltd.,Xi’an 710201,Shaanxi,China)

机构地区：[1]西部金属材料股份有限公司,陕西西安710201

出　　处：《钢铁钒钛》2024年第6期74-79,共6页Iron Steel Vanadium Titanium

基　　金：国家重点研发计划(SQ2022YFB3700180);陕西省秦创原“科学家+工程师”队伍建设项目(2022KXJ-105)。

摘　　要：对TA18钛合金管材开展惯性旋转摩擦焊接(IRFW)研究,采用光学显微镜与扫描电镜观察了TA18钛合金管摩擦焊接头各个区域的组织形态,结合焊接过程分析了组织的特征与演化机制,根据拉伸试验、室温冲击试验、显微硬度试验等测试结果分析了焊接接头的力学性能。结果表明,由于短时间内焊接接头处发生了强烈的塑性变形,IRFW接头焊缝处的组织为针状α′相;热影响区的组织为等轴α相、部分针状α′相和残余β相。TA18钛合金管材IRFW接头的抗拉强度与母材相当,且断裂位置均位于远离焊缝中心的位置。IRFW接头显微硬度较均匀,各区域硬度匹配性好,接头具有良好的冲击韧性,达到母材的96.85%。Inertial rotary friction welding(IRFW)research was conducted on TA18 titanium alloy tube.The microstructure of the IRFW joint of TA18 titanium alloy tube was observed using optical microscopy and scanning electron microscopy,and the characteristics and evolution mechanism of the microstructure were analyzed in combination with the welding process.The mechanical properties of welded joints were analyzed using methods including tensile testing,impact testing,and microhardness testing.The results indicate that due to strong plastic deformation occurring at the welded joint in a short period of time,the microstructure of the welded zone of IRFW joint welded is mainly composed of needle-likeα′phase.The microstructure of the thermal mechanical affected zone of IRFW joint welded is mainly composed of equiaxedαphase,needle-likeα′phase and residualβphase.The tensile strength of the IRFW joint of TA18 titanium alloy tube is equivalent to that of the base material,and the fracture positions are all located far from the center of the weld zone.The microhardness of the IRFW joint is relatively uniform,and the hardness of each region can be matched.The impact toughness of the weld zone of the IRFW joint reached 96.85%of the base material.

关 键 词：TA18钛合金 惯性旋转摩擦焊接 显微组织 力学性能 

分 类 号：TF823[冶金工程—有色金属冶金] TG453.9[金属学及工艺—焊接]