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一、概述钛合金具有比强度高、热强度高、抗蚀性高的特点,是航空工业中最有前途的一种结构材料。由于钛合金在酸、碱、盐等腐蚀介质中很稳定,因此工业部门常用作有机物溶液的输送管道。钛合金具有高度的化学活性,既增强了材料的抗蚀性,又给焊接过程造成了一定的难度。二、TA4焊接特点分析 (一)易产生氧气孔钛是极活泼元素,在溶化状态甚至在高于400℃的固态时,就能吸收氢而形成固溶体。冷却时氢在钛中溶解度显著下降,易造成氢气
First, an overview Titanium alloy with high strength, high strength, high corrosion resistance characteristics of the aviation industry is the most promising a structural material. As the titanium alloy in acid, alkali, salt and other corrosive medium is very stable, so the industrial sector is often used as organic solution delivery pipeline. Titanium alloy with a high degree of chemical activity, both to enhance the corrosion resistance of the material, but also to the welding process caused a certain degree of difficulty. Second, analysis of TA4 welding characteristics (A) easy to produce oxygen Titanium is a very lively element, even in the molten state of solid above 400 ℃, it can absorb hydrogen to form a solid solution. Hydrogen solubility in titanium significantly decreased, easily lead to hydrogen