石墨烯对司太立熔覆涂层组织及力学性能影响

Influence of Graphene Added on Microstructure and Mechanical Properties of Stellite Cladding Layer

采用氩弧熔覆技术在Q235钢表面制备不同石墨烯含量的司太立合金复合涂层。通过X射线衍射分析试验、显微硬度试验、摩擦磨损试验等研究不同石墨烯含量对Q235钢表面熔覆司太立合金涂层组织及力学性能的影响。试验结果表明:随着石墨烯含量的增加,涂层组织显微硬度呈现先增大后减少的趋势,当石墨烯碳含量为0.4%时熔覆层显微硬度最高值达770HV。同时石墨烯与司太立复合添加有利于其耐磨性的提升,且在石墨烯含量为0.4%时,其耐磨性最好。

Stellite alloy mixture coatings were made on Q235 steel surface with different graphene contents by argon arc cladding. Effects were investigated on microstructure and mechanical properties. Stellite alloy cladding coating of Q235 steel surface by adding different graphene content.Many test were done during this work such as X-ray diffraction analysis test, microhardness test and friction and wear test. It is showed that the calding coating microhardness is increased and then decreased with the increasing of the graphene content added. The maximum microhardness is 770HV by adding 0.4 percent graphene. At the same time, the wear resistance is increased by mixture of graphene and Stellite for the clading coating. Furthermore, the wear resistance is the best by 0.4 percent graphene added for the calding coating.