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.
出处
《焊接》
北大核心
2015年第10期45-48,70,共4页
Welding & Joining
关键词
增材制造
钛合金
力学性能
additive manufacturing
titanium alloy
mechanical properties
