Pr激光表面合金化提高Ti－6Al－4V抗氧化性

IMPROVING OXIDATION RESISTANCE OF Ti-6Al-4V BY LASER SURFACE ALLOYING WITH Pr

采用激光Ｐｒ合金化表面处理，研究了Ｔｉ合金的高温氧比行为，结果表明，加入Ｐｒ改变了氧化膜结构，抑制了氧的短路扩散，并改善膜的附着性和塑性，氧化速度显著下降．

he oxidation behaviour of Ti-6Al-4V at the elevated temperatures is studied by using laser surface alloying with Pr. The isothermal oxidation test shows that the addition of Pr changes the structures of a scale of Ti-6Al-4V, controls the short-range diffusion of oxygen to the scale/Ti interface and increases the adhesion and ductility of the scale. Thus, the oxidation kinetics of Ti-6Al-4V is beneficially changed and the oxidation rate is considerably reduced.