摘要
对RuTi钛合金与1060Al进行脉冲熔化极氩弧熔-钎焊(P-GMAW),采用扫描电镜(SEM)、显微硬度仪等对RuTi/1060Al接头显微组织进行分析;对焊缝中的析出相及钛合金侧过渡区进行能谱(EDS)元素分布分析.结果表明,RuTi/1060Al接头焊缝由α-Al树枝晶及分布于树枝晶边界的α-Al+Si共晶组织组成.焊缝中出现了由Ti(Al,Si)3金属间化合物组成的条状、块状析出相.RuTi钛合金与焊缝之间形成了一层厚度小于10μm、主要由Ti(Al,Si)3金属间化合物组成的锯齿状过渡区.随着焊接热输入的增加,Ti/Al过渡区由锯齿状向条状变化.钛合金热影响区主要由针状α″马氏体与条状α’马氏体组成,显微硬度为2.16~2.65 GPa.
Pulsed gas metal arc welding of RuTi titanium alloy to 1060 aluminum was conducted. The microstructure in weld zone of RuTi Ti /1060Al joint was examined by scanning electron microscope( SEM) fitted with energy-dispersive spectrometer( EDS). Elemental distribution and precipitated phase in weld zone and transition region on Ti alloy side were analyzed by EDS. The weld zone was composed of α-Al dendrites and eutectic α-Al + Si structures. The eutectic α-Al + Si structures distributed along the boundaries of α-Al dendrites. Striped or block Ti( Al,Si)3intermetallics appeared in the weld zone. A serrated transition region mainly containing Ti( Al,Si)3intermetallics was formed between the RuTi titanium alloy and the weld zone. The width of the Ti / Al transition region was less than 10 μm. With the increasing of welding heat input,the Ti / Al transition region presented a rod-like appearance. The heat-affected zone( HAZ) of RuTi titanium alloy consisted of acicular α″ and lath α' martensite. The average microhardness in the HAZ was about 2. 16-2. 65 GPa.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2014年第4期63-66,116,共5页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(51175303)
