稀土活性剂对TC4钛合金激光焊焊接接头的影响  

Effect of Rare Earth Active Agent on Laser Welding Joint of TC4 Titanium Alloy

作　　者：许爱平 侯继军[1] 董俊慧[1] XU Aiping;HOU Jijun;DONG Junhui(College of Materials Science and Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)

机构地区：[1]内蒙古工业大学材料科学与工程学院,呼和浩特010051

出　　处：《材料导报》2020年第S02期348-350,共3页Materials Reports

摘　　要：研究了稀土活性剂对激光焊5 mm厚TC4钛合金焊接接头组织和性能的影响。讨论了熔深增加的机理,在光学显微镜下还观察到熔合区的微观结构特征。结果表明:稀土活性剂能有效地提高TC4钛合金的熔深,并且可能是多种原因共同作用的结果,而不是单一的抑制光致等离子体的结果。用稀土活性剂进行激光焊时,可以略微细化β-Ti组织。在两种焊接过程中,显微硬度分布表明稀土活性剂能提高金属的塑性变形能力。The effect of soil flux on the microstructure and properties of laser welding 5 mm thick TC4 titanium alloy was studied.The mechanism of increasing penetration depth was discussed.Under the optical microscope and gauge was found to fit the microstructure characteristics.The results showed that the rare-earth activator can effectively improve the TC4 alloy,and the increase of rare-earth surfactant could be the result of many reasons together,rather than a single inhibitory to reported results from the body,such as agent of rare earth used in laser welding,can be slightly refinedβ-Ti organization.In two kinds of welding process,the microhardness distribution showed that the rare earth active agent can improve the union of metal intercourse ability.

关 键 词：稀土活性剂 TC4钛合金 熔深 等离子形态 微观组织 

分 类 号：TB3[一般工业技术—材料科学与工程]