钛合金常规表面改性技术多存在与基体结合强度差的不足，采用双层辉光等离子渗铬则可解决这一问题。为此，利用双层辉光等离子表面冶金技术对Ti6Al4V合金表面渗铬，通过正交试验优选了最优渗铬工艺主参数，对渗层的抗高温氧化性能进行了研究。从渗层厚度和与基体结合强度方面得到了最优工艺参数：源极电压950V，工件电压400V，气压35Pa，极间距12mm。在此工艺参数下可获得组织均匀、致密、无裂纹及由过渡层、沉积层和扩散层组成的渗铬层，其与Ti6Al4V合金基体间呈冶金结合；且随渗层厚度增加，其抗高温氧化性能更好，原因是渗铬层在高温氧化后生成了组织致密的Cr2O3，有效地阻止了基体进一步氧化，从而显著提高了Ti6Al4V合金表面的抗高温氧化性能。
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