摘要
对薄壁Gr.1纯钛直缝焊管采用激光焊接方式焊接,并对试验获得的样管进行了宏观形貌、显微组织分析和力学性能测试。结果表明,直缝薄壁焊管焊缝宽度较窄,外焊缝宽度为1.51 mm,内焊缝宽度为0.98 mm。钛焊管焊缝微观组织主要为柱状α相、锯齿状α相和少量针状α相。扩口、压扁、反弯试验结果均合格。最后对样管进行胀管试验,胀幅达到18.4%,外观变形较为均匀。从胀管后微观组织可知,胀管后焊缝、热影响区以及母材大部分晶粒受到拉伸作用明显变形和破碎,并产生较多针状α相,但均没有产生裂纹。
The thin-walled Gr.1 pure titanium straight seam welded pipe was welded by laser,and the samples obtained from the experiment were analyzed for macroscopic morphology,microstructure and mechanical properties.The results show that the weld width of longitudinally welded thin-walled pipe is relatively narrow,with an outer weld width of 1.51 mm and an inner weld width of 0.98 mm.The microstructure of titanium welded pipe weld is mainly columnarαphase,serratedαphase and a small amount of needle shapeαphase.The results of flaring,flattening,and reverse bending tests are all qualified.Finally,an expansion test was conducted on the sample tube,and the expansion amplitude reached 18.4%,with a relatively uniform deformation in appearance.From the microstructure after tube expansion,it can be seen that after tube expansion,most of the grains in the weld seam,heat affected zone,and base metal are significantly deformed and broken due to tensile action,and many needle shapedαphase grains are produced,but no cracks occurred.
作者
殷鑫
李军兆
李海明
樊程
刘文正
彭盛军
孙清洁
曾宪山
Yin Xin;Li Junzhao;Li Haiming;Fan Cheng;Liu Wenzheng;Peng Shengjun;Sun Qingjie;Zeng Xianshan(Hunan Xiangtou Goldsky New Materials Co.,Ltd.,Yiyang 413000,Hunan,China;Harbin Institute of Technology at Weihai,Weihai 264209,Shandong,China)
出处
《钢铁钒钛》
CAS
北大核心
2024年第5期70-73,共4页
Iron Steel Vanadium Titanium
基金
湖南省科技创新计划资助(2022RC1060、2022GK4046、2022TP2034、2023GK2087)。
关键词
激光焊
钛管
微观组织
力学性能
胀管
laser welding
titanium pipe
microstructure
mechanical properties
expand tube
