铁基固溶体α弥散增韧Fe_9Cr_9Si_2三元金属硅化物合金耐磨性  

Sliding Wear Properties of Dispersion-Toughened Fe_9Cr_9Si_2-Based Ternary Metal Silicide Alloy

作　　者：袁源[1] 王华明[1] 

机构地区：[1]北京航空航天大学,北京100083

出　　处：《稀有金属材料与工程》2009年第A01期321-324,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(50331010;50625413)

摘　　要：设计并采用常规熔铸法制备出由σ相Fe9Cr9Si2三元金属硅化物和铁基固溶体α组成的双相新型耐磨合金,其显微组织由Fe9Cr9Si2基体和项链状颗粒弥散分布的α增韧相组成。由于基体Fe9Cr9Si2的高硬度及弥散相α良好的增韧作用,合金表现出优异的室温干滑动耐磨性能。磨损过程中在磨损表面形成独特的氧化颗粒覆盖层,覆盖层是合金具有优异耐磨性能的重要原因。A novel wear resistant Fe-Cr-Si intermetallic alloy consisting of the a-phase Fe9Cr9Si2 ternary metal silicide and small amount of dispersive ferrite solid solution α （hereafter as α-toughened Fe9Cr9Si2 alloy） was designed and fabricated by the conventional casting process. Wear resistance of α-toughened FegCr9Si2 alloy was evaluated on an MM-200 block-on-wheel dry sliding wear tester at room temperature and the wear mechanisms were discussed. Due to the high hardness of Fe9Cr9Si2 matrix, the good toughening effect of the dispersive ductile a particles and the stable formation of the oxide particle cover layer, the α-toughened FegCr9Si2 alloy exhibited excellent wear resistance.

关 键 词：Σ相 耐磨合金 磨损 金属间化合物 

分 类 号：TG113.2[金属学及工艺—物理冶金]