铜/钛铝锡碳焊接区的组织结构和弯曲强度  

Microstructure and Flexural Strength of Welding Zone of Cu/Ti_3AlSn_(0.2)C_(1.8)Cermet

作　　者：张华[1] 翟洪祥[1] 艾明星[1] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《稀有金属材料与工程》2007年第A02期468-470,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(50472045)资助;北京交通大学校基金(2006XM030)

摘　　要：用氩弧熔化焊接方法,在无焊料的情况下对铜/钛铝锡碳(Cu/Ti_3AlSn_(0.2)C_(1.8))金属陶瓷材料进行直接熔焊连接。观察分析了焊接区及其附近的组织变化,测试了焊接区的室温弯曲强度。结果表明,Cu/Ti_3AlSn_(0.2)C_(1.8)材料具有良好的可焊接性。焊接区域呈网络状Cu(Ti,Al,Sn)合金包围均匀弥散的细小TiC_x颗粒的典型组织结构。在适当的电弧电流密度、拉弧时间和施加压力等焊接条件下,焊接区的室温弯曲强度达到851 MPa,焊接区的弯曲强度达到或超过了Cu/Ti_3AlSn_(0.2)C_(1.8)材料自身的强度。The argon-arc welding of Cu/Ti3AlSn0.2C1.8 cermet was carried out without filler. The changes of microstructure in welding zone and its vicinity were observed, and flexural strength of the welding zone was also tested. The results show that the joining of Cu/Ti3AISn0.2C1.8 cermet by argon-arc welding can be performed. The microstructure in welding zone is made up of network-shaped Cu（Ti, Al, Sn） alloys and dispersed TiCx particles. The flexural strength of welding zone at room temperature reaches up to 851 MPa under the conditions of proper arc current density, arc time and pressure. The flexural strength of welding zone reaches or exceeds that of Cu/Ti3AlSn0.2C1.8 cermet.

关 键 词：Cu/Ti3AlSn0.2C1. 8 氩弧焊 组织结构 弯曲强度 

分 类 号：TG407[金属学及工艺—焊接]