CAJ | 학술논문

目的：通过激光熔覆技术,在Q235钢表面原位生成WC-B4 C增强镍基熔覆层。方法以WO3, B2 O3,C和Ni60混合粉末为预涂原料,采用激光熔覆技术原位生成WC-B4 C增强镍基熔覆层,对熔覆层的显微组织和物相构成进行分析,研究其摩擦磨损性能。结果采用合适的工艺参数,通过原位生成WC-B4 C形成的增强镍基涂层形貌良好,与基材呈现较好的冶金结合。熔覆层平均硬度1200HV0.3,摩擦磨损失重仅为纯Ni60熔覆层的1/3。结论熔覆层硬度较高,耐磨性很好。大量原位生成的WC-B4 C增强相及其均匀分布是熔覆层硬度和耐磨性提高的原因。
목적：통과격광용복기술,재Q235강표면원위생성WC-B4 C증강얼기용복층。방법이WO3, B2 O3,C화Ni60혼합분말위예도원료,채용격광용복기술원위생성WC-B4 C증강얼기용복층,대용복층적현미조직화물상구성진행분석,연구기마찰마손성능。결과채용합괄적공예삼수,통과원위생성WC-B4 C형성적증강얼기도층형모량호,여기재정현교호적야금결합。용복층평균경도1200HV0.3,마찰마손실중부위순Ni60용복층적1/3。결론용복층경도교고,내마성흔호。대량원위생성적WC-B4 C증강상급기균균분포시용복층경도화내마성제고적원인。
Objective To in-situ synthesize WC-B4 C reinforced Ni-based composite coating on the surface of steel Q235 sub-strate using laser cladding technique. Methods Using WO3 , B2 O3 , C and Ni60 as pre-coating raw materials, in-situ WC-B4 C rein-forced Ni-based composite coating was synthesized by laser cladding technology. The microstructure observation, component and phases analysis of the coatings were performed to analyze the friction and wear resistance performance. Results The results indica-ted that a good finish WC-B4 C particulate reinforced composite coating could be achieved by proper laser cladding processes. The coatings epitaxial growing from the substrate with excellent bonding between the coating and substrate was assured by the strong metallurgical interface. The in situ synthesized WC-B4 C particulate reinforced Ni-based composite coating had very high hardness of 1200HV0. 3, and excellent wear resistance which was only 1/3 that of pure Ni60 coatings. Conclusion The coating layer had improved hardness and wear resistance, which was due to the in-situ synthesis of WC-B4 C and its homogenous distribution in the cladding layer.