Performance of Clad Layer Using Mixed Powder of Stellite 6 and VC

doi:10.3901/JME.2017.14.165

Abstract

Abstract: The enhancement of the blade of aircraft with small power pulse laser is an urgent problem to be solved.Pulse 300W Nd:YAG laser facility is used for cladding in this experiment,and Stellite 6 alloy and VC mixed powder are cladded on mild steel (SM400B) plate. Shape of clad layer, microstructure and performance of clad layer are investigated by changing the weight fraction of VC in the range of 0 to 100% to research the process of strengthening the blade of aircraft with small power pulse laser. The experimental results demonstrate that with the increase of the content of VC, the microstructure of the cladding layer is changed from the eutectic structure to the eutectic structure. The hardness, crack sensitivity and wear resistance of the cladding layer are increased with the increase of VC when the content of VC is less than 80%, and when the weight of VC is more than 80%, the hardness, crack sensitivity and wear resistance of the cladding layer decrease with the increase of VC due to dilution effect of parent material.The results show that high quality cladding layer with good wear resistance,high hardness and low crack sensitivity can formed by using Co based alloy (Stellite-6) and vanadium carbide (VC) mixed powder,which can make a great effect in strengthening the blade of aircraft.

Key words: crack susceptibility, laser cladding, pulsed Nd:YAG laser, Stellite-6, vanadium carbide, wear resistance

CLC Number:

TG456

XU Guojian, YANG Wenqi, HANG Zhengxiang, LIU Xiangyu, CHI Hailong, OU Xuesong. Performance of Clad Layer Using Mixed Powder of Stellite 6 and VC[J]. Journal of Mechanical Engineering, 2017, 53(14): 165-170.

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