【摘要】 对比研究了Q235钢进行双层辉光等离子MoCr共渗和不同热处理工艺处理的表面层组织和性能。结果表明:Q235钢等离子MoCr共渗+超饱和渗碳+淬火+深冷处理+回火的试样,表面渗层组织结构细小,碳化物分布弥散,尺寸小于1μm,表面硬度达到1600HV。摩擦磨损试验表明:Q235钢经过渗碳+淬火+低温回火、等离子MoCr共渗+离子渗氮、等离子MoCr共渗+超饱和渗碳+淬火+低温回火、等离子MoCr共渗+超饱和渗碳+淬火+深冷处理+低温回火处理的试样的相对耐磨性分别为:1,1.32,1.6和2.74。更多还原

【Abstract】 Different heat treatment processes and the microstructures and mechanical properties of Mo-Cr infiltration layer on Q235 steel prepared by double glow discharge technology were studied. The results show that, after the Q235 steel samples were treated by Mo-Cr infiltration+carbonization+quenching+cryogenic processing+low tempering, the carbides of the steel alloying layer are compact, uniform and disperse, the dimension of the surface carbides are less than 1μm, the surface hardness is up to 1600HV. The abrasion testes results of the samples treated by different processes indicate that, the ratios of relative wear resistance are 1, 1.32, 1.6 and 2.74 respectively, for the processes of carbonization + quenching+tempering at low temperature, Mo-Cr metallic cementation+plasma nitriding, Mo-Cr metallic cementation+carbonization+quenching+tempering at low temperature, Mo-Cr metallic cementation+carbonization+quenching+cryogenic processing for 2h+tempering at low temperature.更多还原