TIG增材制造TC4钛合金力学性能及工艺参数的影响规律  

Mechanical properties of TC4 components produced by additive manufacturing with TIG welding

作　　者：张萍[1] 刘德波[2] 师建行 林三宝[3] 刘宁[3] 

机构地区：[1]新乡职业技术学院机电系,453000 [2]黄河科技学院,郑州市450063 [3]哈尔滨工业大学先进焊接与连接国家重点实验室,150001

出　　处：《焊接》2015年第10期45-48,70,共4页Welding & Joining

摘　　要：采用TIG增材制造的方法成型TC4钛合金零件,并对成型件的力学性能特征及焊接工艺参数对成型零件的力学性能的影响规律进行研究。研究发现,所成型零件的力学性能存在着各向异性,这是由于柱状晶定向生长造成的。沉积态TC4钛合金的力学性能能够满足美国机械工程学会对于沉积态钛合金的最新标准AMS4999:2002。参数的影响规律如下:随着焊接电流的增加,X和Z方向上的抗拉强度有所降低而断后伸长率提高;随着焊接速度的增加,X和Z方向上的抗拉强度提高而断后伸长率降低;随着送丝速度的增加,X方向上的抗拉强度和断后伸长率都有所降低,而Z方向上的抗拉强度和断后伸长率均有所提高;随着层间间隔时间的增加,X方向和Z方向上的抗拉强度和断后伸长率都有所提高。TC4 components were produced by additive manufacturing with TIG welding,and mechanical properties and the influence of welding parameters on mechanical properties were studied.Anisotropy of mechanical properties was discovered,which is attributed to the orientated growth columnar grains.The mechanical properties can meet the requirement of AMS4999:2002.When welding current increases,the tensile strength in X and Z decrease,but the elongation increases.When welding speed increases,the tensile strength in X and Z increases,but the elongation decreases.When wire feeding speed increases,the tensile strength and elongation in X decreases,but the tensile strength and elongation in Z increases.When interval time increases,the tensile strength and elongation in X and Z increase.

关 键 词：增材制造 钛合金 力学性能 

分 类 号：TG115.28[金属学及工艺—物理冶金]