Microstructure and Wear Resistance of Ni3Al/Cr3C2 Laser Cladding Composites
In this study,laser cladding has been applied to produce Ni3Al/Cr3C2 coatings for diesel engine.The microstructure and wear resistance of the Ni3Al/Cr3C2 coatings were investigated.The results indicate that in-situ formed fine Cr-carbides distribute homogeneously in the Ni3Al/Cr3C2 laser cladding materials when the Cr3C2 addition is less than 35%or the feeding rate of powder is less than 1.16 kg/h,whereas the coarse Cr-carbides occur as the Cr3C2 addition reaches 45%or the powder feeding rate is up to 1.45 kg/h.The mass loss by wear of the Ni3Al/Cr3C2 cladding materials decreases with increasing Cr3C2 addition or feeding rate of powder,which is remarkably less than that of the vermicular graphite cast iron,showing excellent wear resistance.Moreover,the mass loss of the counterpart disk worn by the Ni3Al/Cr3C2 composites is also less than that worn by the vermicular graphite cast iron in the case of appropriate Cr3C2 addition and feeding rate of powder.These results demonstrate that Ni3Al/Cr3C2 laser cladding composite is a potential wear-resistant coating material for engine applications.
Ni3Al/Cr3C2 Laser cladding Microstructure Wear resistance Cr-caobides
Zhao Lin Han Wei Gong Karin Bengtsson Sven Li Changhai Tian Zhiling
Central Iron and Steel Research Institute,Beijing 100081,China Department of Materials and Manufacturing Technology,Chalmers University of Technology,Gothenburg SE H(o)gan(a)s AB,H(o)gan(a)s 26383,Sweden
国际会议
北京
英文
1287-1291
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）