(洛阳船舶材料研究所，洛阳 471039)
摘 要: 采用GTAW和PAW 2种焊接工艺，对厚度为9 mm的Ti-Fe-Al系合金板材进行对接焊接试验，考察其焊接性能以适应船舶行业对低成本钛合金的使用要求。通过工艺参数的优化，获得了良好的焊缝外观成形，并结合性能测试结果分析了接头的组织和性能。研究结果表明：采用这2种焊接方法得到的Ti-Fe-Al系合金接头质量达到了X射线检测Ⅰ级水平，熔敷金属合金成分和杂质含量控制适当，接头硬度分布均匀，拉伸、弯曲和冲击性能良好，冲击断口呈韧性断裂，微观金相观察无析出相。
关键字: Ti-Fe-Al合金；工艺参数；显微组织；力学性能；析出相
（Luoyang Ship Material Research Institute, Luoyang 471039, China）
Abstract:The GTAW and PAW experiments were operated on Ti-Fe-Al alloy plates with thickness of 9 mm in order to qualify welding performance for operating requirement about low-cost titanium alloy on ship trade. Good appearance of welding joint was got by optimizing technics parameters and the microstructure and properties of welding joints were analysed according to aptitude test results. The results show that the quality of obtained joints through both of welding methods can reach the Ⅰ grade of RT; alloy elements and impurity contents in welding line can be controlled befittingly; rigidity values distribute equably and tensility, bending and impacting test results are proved excellent. Especially, no precipitated phase is found in microstructure.
Key words: Ti-Fe-Al alloy; technics parameters; micro-structure; mechanical property; precipitate phase
