水浴PTIG微变形电弧增材制造工艺

针对TIG电弧增材制造过程中焊件与基板变形累积的问题，提出了水浴PTIG微变形电弧增材工艺.阐述了水浴PTIG电弧增材工艺的原理和系统组成，对比了水浴和空冷两种工艺条件下增材制造的熔敷速率、基板变形和成形质量.结果表明，水浴条件下的有效熔敷速率稳定在144 g/h，是空冷条件下的2.7倍.水浴条件下基板平面度为2.114，较空冷时降低24%.水浴对直壁体的高度方向成形精度影响较大，对宽度方向影响甚微，水浴时直壁成形件的高度标准差为2.6 mm，低于空冷（3.1 mm），宽度方向均为0.3 mm.

Micro-deformation P-TIG wire and arc addictive manufacture under water bath

Aiming at the problem of the accumulation of welds and substrates''deformation during wire feeding TIG addictive manufacture, the article proposes the process of micro-deformed P-TIG wire and arc addictive manufacture. The principle and system composition of the water bathed PTIG arc adddictive process are described. The deposition rate, substrate deformation and forming quality of the material are compared under the two conditions of water bath and air cooling. The results show that the deposition rate in the water bath is stable at 144 g/h, which is 2.7 times of that under air cooling. The flatness of the substrate under the water bath condition is 2.114, which is 24% lower than that in the air cooling. The height difference between the diameter of the straight wall is 2.6 mm, which is lower than the air cooling (3.1 mm) and the width direction is 0.3. The water bath has a great influence on the forming precision of the straight wall in the height direction.