摘要:
气雾水冷方法制备Cu14Al4.5FeNiCe合金粉末,等离子喷焊方法实现粉末在45钢表面喷焊层的制备.采用光学显微镜,XRD,SEM,EDS分析喷焊层表面、结合横断截面、磨损表面及合金相结构和组织形貌,拉伸法测定喷焊层与基体结合力,用UMT-2MT摩擦试验机测试喷焊层与304不锈钢对摩的无润滑摩擦磨损行为.结果表明,Cu14Al4.5FeNiCe合金喷焊层形成α+γ2及β'包围k相生长、均匀细化的组织,与45钢基体形成冶金结合,表面硬度达320 HB;喷焊层与304不锈钢对摩摩擦系数在40 N(压力5.7 MPa)时为0.105,随载荷变化很小,表现出良好的减摩性;磨损率随载荷增加的幅度不大,具有良好的耐磨性.
Abstract:
A Cu14Al4.5FeNiCe clad was formed on 45 carbon steel by plasma spraying of Cu14Al4.5FeNiCe alloy powder which was prepared by water cooled gas atomizing. The morphologies and phase structures of the clad,and the intersection between the clad and the carbon steel were investigated by optical microscope,scanning electron microscope,energy dispersion spectroscope and X-ray diffraction analyzer. The interfacial bonding strength between the clad and the carbon steel substrate was measured by tensile test. Tribology properties of the sprayed clad against 304 stainless steel under no-lubrication condition were evaluated on an UMT-2MT tester. Results showed that the sprayed Cu14Al4.5FeNiCe clad combined firmly to the 45 carbon steel substrate in a metallurgy way with a surface hardness of HB 320. The clad was composed of(α +γ2),β' and K phases,in which K phase was dispersed into the matrix of(α +γ2) and β'. The clad presented a good anti-lubrication character with friction coefficient of 0.105 under the load of 40N(5.7 MPa). Friction coefficient of the Cu14Al4.5FeNiCe clad against 304 stainless steel increased slightly with load increasing. The clad exhibited a high wear-resistance to 304 stainless steel,wear rate of the clad increased smoothly with load.
百度学术
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