铸造钛合金补焊技术研究进展

铸造钛合金存在缺陷时可以通过补焊修复，在这过程中容易受到氢、氧、氮的影响而导致焊区出现裂纹、氧化、脆化等缺陷，由此影响到整个构件的整体性能，这都是由其自身的物理特性和化学特性所决定的。概述了铸造钛合金的补焊特性，并对补焊中常见的缺陷进行了分析；介绍了铸造钛合金补焊缺陷的检测方法，进而提出了控制补焊缺陷的有效防范措施；提出了补焊工艺参数的选择原则及注意事项；描述了各种铸造钛合金补焊方法的优缺点，并最终确定各补焊方法的选择原则及适用依据。随着钛合金铸件在航空、航天领域的广泛推广及应用，铸造钛合金补焊技术将成为其不断向前发展的一种不可或缺的制造工艺。

Progress in Research on Cast Titanium Alloy Welding Repair

Defects of cast titanium alloy might be repaired by welding. The welding properties of cast titanium and titanium alloys have many notable characteristics, all of which are determined by their physical and chemical properties. Cast titanium alloys are easily affected by hydrogen, oxygen and nitrogen during welding repair, which affects the overall performance of the component. The welding repair characteristics of cast titanium alloy were summarized; the common defects in welding repair were analyzed; the detection methods of defects were introduced; the measurements to control welding repair defects were put forward; and the selection principles and notice of the welding parameters were described. Advantages and disadvantages of the welding repair method were obtained, and the selection principle and application of the welding repair methods were determined. With the generalization and application of cast titanium alloy in aviation and aerospace fields, the welding repair technology will become an indispensable process to promote the development.