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目前钛合金焊接方面仍然存在不少急待解决的问题,氧化问题即是其中之一。由于钛是十分活泼的元素,高温下易与空气中的氧、氮、氢作用,而使焊接接头塑性变坏,故必须对400℃以上的焊接区域采用惰性气体进行保护。一般来说,对直缝或环缝可用局部保护的方法,对几何形状复杂的焊缝则采用整体保护的方法,基本上解决了焊接接头的氧化问题,但是不管采用什么方法,要彻底解决生产中的氧化问题,工艺上还有困难,局部焊缝上出现
At present, there are still many urgent problems to be solved in the welding of titanium alloys. The problem of oxidation is one of them. Because titanium is a very lively element, it is susceptible to oxygen, nitrogen and hydrogen in the air at high temperature, which causes the plasticity of the welded joint to deteriorate. Therefore, it is necessary to protect the welding area above 400 ℃ with inert gas. Generally speaking, the method of partial protection for straight seam or ring seam can be adopted, and the overall protection method can be adopted for weld with complicated geometric shape, which basically solves the oxidation problem of welded joints. However, no matter what method is adopted, the production In the oxidation problem, there are difficulties in the process, the local weld appears