针对用TC17（α+β）、TC17（β）钛合金材料，开展了线性摩擦焊接头组织和力学性能研究。结果表明：焊接接头共分为TC17（α+β）母材区、TC17（α+β）热力影响区、焊缝区、TC17（β）热力影响区、TC17（β）母材区5个部分；力学性能测试结果表明，试验温度为室温、200℃、300℃、400℃时，TC17（α+β）/ TC17（β）线性摩擦焊接头抗拉强度均达到母材的97%，试验温度为400℃时，持久强度达到母材的95%。%[ABSTRACT] The microstructure and mechanical properties of linear friction welded TC17(α+β)/TC17(β) joint are investigated. The results show that ifve different structures are existed in linear friction welded joint, i.e. TC17(α+β) base metal, thermomechanically affected zone (TMAZ) of TC17(α+β),weld zone, thermomechanically affected zone (TMAZ) of TC17(β), TC17(β)base metal. The tensile strength of joint reaches to about 97% of the base metal under the conditions of the room tempera-ture,200℃,300℃ and 400℃.The creep rupture strength of joint reaches to about 95% of the base metal.
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