黃家偉1，李 聰2， 邱紹宇2
( 1. 重慶大學 材料科學與工程系， 重慶 400044；
2. 核燃料及材料國家重點實驗室，成都 610041)
摘 要: 對TA17鈦合金與1Cr18Ni9Ti不銹鋼的焊接接頭強度進行了實驗研究。 采用恒溫恒壓擴散焊、 相變超塑性擴散焊和脈沖加壓擴散焊實現(xiàn)了鈦合金和不銹鋼的焊接， 測試了焊接接頭的強度， 并對接頭進行了金相觀察。 結果發(fā)現(xiàn)： 3種接頭的強度都達到了264 MPa， 且接頭為多層次的多相組織。 物相分析發(fā)現(xiàn)鈦合金-不銹鋼接頭中存在Fe2Ti和σ-(FeCr)兩種脆性金屬間化合物。 脈沖加壓擴散焊能促進擴散過程， 減少金屬間化合物的形成， 改善其分布， 是一種較有前景的擴散焊方法。
關鍵字: 鈦合金； 不銹鋼； 擴散焊； 金屬間化合物
HUANG Jia-wei1,LI Cong2, QIU Shao-yu2
（ 1. Department of Materials Science and Engineering,Chongqing University,
Chongqing 400044, China;
2. National Key Laboratory for Nuclear Fuel and Materials， Chengdu 610041, China）
Abstract: The strength of welding joint between titanium alloy TA17 and stainless steel 1Cr18Ni9Ti was investigated. Bonded joint was obtained by diffusion bonding at constant temperature and pressure, phase transformation superplastic diffusion bonding and diffusion bonding under pulsatile pressure. The strength of welding joint was tested and metallography of welding joint was observed. The results show that the strength of joints obtained by three diffusion welding are all up to 264 MPa and there are several different layers in the joint. Phase analysis shows that there exist brittle Fe2Ti and σ -(FeCr) in the titanium alloy-stainless steel joint. Diffusion bonding under pulsatile pressure is an ideal bonding method, which can accelerate diffusion, reduce the amount of intermetallic compound and improve its distribution.
Key words: titanium alloy; stainless steel; diffusion bonding; intermetallic compound
