摘要
以AlMg^3焊丝对5052铝合金和Ti-6Al-4V钛合金进行TIG熔钎焊,获得了同时具有熔焊和钎焊双重特征的接头。采用BSE、EDS、XRD以及万能拉伸试验机对铝/钛熔钎焊接头微观组织及力学性能进行了研究。结果表明:在焊接过程中将钨极中心向铝合金一侧偏离焊缝中心线0.8 mm时,铝/钛接头钎焊界面形成2~4μm厚的锯齿状Ti Al+3反应层。在拉伸试验中,接头断裂发生在铝合金母材,最高抗拉强度达到185 MPa。
A tungsten inert gas（ TIG） welding-brazing technology using Al Mg-3 filler metal has been developed for joining 5052 Al alloy and Ti-6Al-4V alloy. The Al / Ti alloy joints exhibited a typical welding-brazing dual characteristics. The microstructure and mechanical properties of Al / Ti alloy joints were studied with BSE,EDS,XRD and electronic tensile testing machine. The results indicate that with the optimized tungsten electrode offset D of 0. 8 mm from Al / Ti initial interface to Al side,a 2-4 μm thickness serration-shaped Ti Al3 reaction layer is formed in the brazing zone of the joints. Furthermore,the optimized Al / Ti alloy joint fractures at Al alloy base plate with the maximum tensile strength of 185 MPa.
出处
《金属热处理》
CAS
CSCD
北大核心
2017年第2期44-48,共5页
Heat Treatment of Metals
基金
国家自然科学基金(51275543)
国家科技部重大专项(2012ZX04010-081)
关键词
铝合金
钛合金
TIG熔钎焊
微观组织
力学性能
aluminum alloy
titanium alloy
TIG welding-brazing
microstructure
mechanical properties
