Abstract:
In this paper, the titanium-aluminum-based multi-component alloy was prepared from Panzhihua acid-soluble titanium slag, aluminum powder and calcium oxide. After directly nitriding treatment at different temperatures and different time, a nitrided layer was obtained. Scanning electron microscopy, X-ray diffractometer, microhardness tester, friction and wear testing machine, and three-dimensional topography instrument were used to detect and analyze the properties of the nitriding layer. The results show that the surface hardness and wear resistance of Ti-Al based multielement alloy can be improved by direct nitriding under different conditions. The nitriding temperature has a great effect on the hardness and wear resistance of the alloy. When the nitriding time is 2 h, the optimum nitriding temperature is 800 ℃, the average hardness (HV) of the nitriding layer is up to 698.8, the average friction coefficient is 0.120, the reciprocating friction wear rate is 19.44 mm3/(N·m), and the surface roughness is 0.731 μm. When the nitriding temperature is 900 ℃ and the optimum nitriding time is 3 h, the hardness (HV) of nitriding layer is 682.6, the average friction coefficient is 0.059, the reciprocating friction wear rate is 9.48 mm3/(N·m), and the surface roughness is 0.601 μm.