化学热处理表面改性对TiAl基合金抗高温氧化性能的影响

The Effect of Chemico-thermal Treatment on Oidation Resistance of TiAl Based Alloy

研究了渗碳处理对Ｔｉ－４８Ａｌ－２Ｃｒ－２Ｎｂ（ａｔ．％）合金高温循环氧化性的影响。试验发现，表面渗碳处理能够显著地改善ＴｉＡｌ基合金抗高温氧化能力。使用ＳＥＭ、波谱分析、能谱分析和Ｘ射线衍射分析，研究了渗碳处理提高ＴｉＡｌ基合金抗高温氧化性能的机理。

he effect of carburizing treatment on the oxidation resistance at high temperature of Ti-48Al-2Cr-2Nb(at.%)alloy was investigated.It has been found by test that the odidation resistance of TiAl basedalloy at elevated temperature can be effectively improved by this way.SEM, wave length spectrum analy-sis, EDAX and X-ray diffraction analysis were used to study the mechnism of enhance of oxidation resis-tance of TiAl based alloy by carburization.