激光表面合金化提高钛合金高温抗氧化性能的研究

Improvement in Resistance to High Temperature Oxidation of Titanium Alloy by Laser Surface Alloying with Al+Nb

采用Ａｌ＋Ｎｂ对Ｔｉ－６Ａｌ－４Ｖ进行激光表面合金化处理，在适当的工艺参数下，得到了ＴｉＡｌ３＋ＴｉＡｌ＋少量Ａｌ的合金化层，在９００℃空气介质中的氧化试验结果表明，激光合金化层在氧化时能够形成致密、连续的α－Ａｌ２Ｏ３保护膜层。

Ti 6Al 4V titanium alloy was laser surface alloyed with Al+ Nb. Using proper processing parameters, alloyed layers consisting of TiAl 3+TiAl+minor Al were obtained on the substrates. Results of oxidation test carried out at 900℃ in air showed that a dense and continuous α Al 2O 3 oxide scale, which effectively prevented the substrates from oxidation, could be formed on the surface of the alloyed layer.