摘要
对ZQAl10-3-1.5合金进行不同的处理工艺处理,利用光学显微镜、万能材料试验机、全自动显微硬度仪以及扫描电镜分析了合金处理前后的显微组织、力学性能、磨损量以及磨损形貌的变化。结果表明:铸态合金以黏着磨损为主,T6态合金以黏着磨损和重度磨粒磨损为主,T6态合金经过深冷处理后则主要以磨粒磨损为主;T6态合金进行适当的深冷处理可以细化晶粒,降低空位密度,增大位错密度,增强致密性,显著提高合金的硬度和耐磨性,但是随着深冷时间的延长,ZQAl10-3-1.5合金的磨损量和平均摩擦系数会出现先降低后增加的趋势。
Microstructure,mechanical properties,wear morphology and wear resistance of ZQAl10-3-1. 5 alloy before and after solid solution and aging and cryogenic treatment were investigated by means of optical microscope,universal material testing machine,automatic micro-hardness test and scanning electron microscopy( SEM). The results show that the wear mechanism of the as-cast ZQAl10-3-1. 5 alloy is mainly adhesive wear,while the alloy after solid solution and aging treatment( T6 state) is mainly adhesive wear and severe abrasive wear,and the alloy after solid solution and aging and cryogenic treatment is mainly abrasive wear. The grain of the T6 alloy after proper cryogenic treatment is refined,the vacancy density is reduced,the dislocation density increases,and the hardness and wear resistance of the alloy are greatly improved. But with the increasing of cryogenic time,the wear mass loss and average friction coefficient of the alloy decrease first then increase.
引文
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