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以 Cr- Si- Ni预合金化粉末为原料 ,采用激光熔敷技术在 1Cr18Ni9Ti不锈钢表面制备出以金属硅化物 Cr3Si为增强相、以复杂多元金属硅化物 Cr2 Ni3Si为基体的快速凝固金属硅化物冶金涂层 ,在滑动磨损条件下评价了其耐磨性能 ,并采用阳极极化方法分别评价了该涂层在 0 .5 mol/L 的 H2 SO4 及 3.5 % Na Cl溶液中的电化学耐蚀性能 .结果表明 ,在滑动磨损条件下 ,所研制的涂层具有优异的耐磨性能 ,在 0 .5 mol/L的 H2 SO4 及 3.5 % Na Cl水溶液中具有优良的电化学耐蚀性能 ,这归因于其组成相 Cr3Si及 Cr2 Ni3Si的优异耐磨耐蚀性 ,以及非平衡快速凝固过程导致的组织细化、致密化和均匀化 .
The Cr-Si-Ni prealloyed powder was used as raw material to prepare rapid solidified metal silicide metallurgy with Cr3Si3Si matrix as the matrix on the surface of 1Cr18Ni9Ti stainless steel by laser cladding technology. The tribological properties of the coatings were evaluated under sliding wear conditions. The electrochemical corrosion resistance of the coatings in 0.5 mol / L H2 SO4 and 3.5% NaCl solutions was evaluated by anodic polarization The results show that under the condition of sliding wear, the developed coating has excellent wear resistance, and has excellent electrochemical corrosion resistance in 0.5 mol / L H2 SO4 and 3.5% Na Cl aqueous solution. Due to its composition of phase Cr3Si and Cr2Ni3Si excellent wear resistance and corrosion resistance, as well as non-equilibrium rapid solidification process leads to the organization refinement, densification and homogenization.