研究了基于等离子弧焊的钛合金零件直接金属快速成形方法.采用正交试验和成形温度对比测试的方法,研究了脉冲电流强度、占空比等6个重要工艺参数对成形轨迹截面宽高比的影响规律.结果表明:脉冲电流强度、占空比、送丝速度、工作台速度对宽高比的影响非常显著,等离子气流量对宽高比的影响显著,而脉冲频率的影响不显著.采用获得的优化参数制作了Ti-6Al-4V零件,并进行了抗拉强度和致密度测试,结果表明其抗拉强度和致密度与激光熔覆成形件的性能相当.
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