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摘要
Vanadium alloy have been identified as a leading candidate for fusion energy systems. To construct more effective and economic systems, dissimilar materials joints between vanadium alloys and stainless steel are required. The high vacuum electron beam welding-brazings (EBWB) was used to joining vanadium alloy (V-5Cr-5Ti) to stainless-steel (HR-2). The welded seam appearance and the microstructure as well as the mechanical properties of the joints were analyzed. The results show that the welded seam is good as well as the back. The joints with the characters of welding and brazing and the metallurgically bonded joint are achieved without melting the vanadium alloy sheet. Well controlling the liquid-to-solid interalloying of dissimilar materials, a reaction zone is gained on the interfaces The width of reaction zone at the top of the joint is up to 1 mm, wider than the bottom of the joint (0.5 mm). The thickness and structure of the interface layer formed in the vanadium alloy side influence the joint properties. 20 gm thickness interaction diffusion layer forms in the interface of V base metal and reaction zone and no interfacial intermetallic phases are detected in the joint. The maximum tensile strength of vanadium alloy/stainless-steel dissimilar alloy joints is up to 200 MPa.
- 出版日期2013-11
- 单位中国工程物理研究院
