大尺寸、薄壁TA15钛合金卷筒焊接工艺及精度控制方法研究

Welding Process and Precision Control Method of Lager Size, Thin Wall TA15 Titanium Alloy Drum

摘要: 针对尺寸大、精度要求极高的钛合金薄板焊接变形难以控制的问题，通过对厚度为1.8 mm的TA15钛合金薄板焊接工艺的研究，获得了TA15钛合金焊接工艺参数及焊缝收缩量。采用得到的焊接工艺参数进行了直径ϕ320 mm、1.8 mm厚的TA15钛合金卷筒的焊接，采用设计的新型控变形工装和退火工艺进行了变形量控制。结果表明，采用合适的脉冲TIG焊工艺参数进行焊接，然后在防变形工装控制下进行合适的退火处理，能够使得ϕ320 mm的TA15钛合金卷筒直径公差控制在±0.3 mm内。

Abstract: The welding deformation of titanium alloy sheet with large size and high precision requirements is difficult to control.By studying the welding process of 1.8 mm thick TA15 titanium alloy sheet, the welding process parameters of TA15 alloy and the weld distortion were obtained.The ϕ320 mm, 1.8 mm thick TA15 titanium alloy drum was welded by using the obtained welding process parameters, then the new designed deformation control tool and annealing process were used for deformation control.The results show that the diameter tolerance of ϕ320 mm TA15 titanium alloy drum is controlled in±0.3 mm by welding at proper pulse TIG welding process and annealing under the deformation control tool.