STATISTICAL RESEARCH ON EFFECT OF HEAT-TREATMENT ON DRY SLIDING FRICTION AND WEAR PROPERTIES OF Al2O3f+Cf/ZL109 HYBRID COMPOSITE
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摘要: 利用挤压铸造法制备了Al2O3f+Cf/ZL109短纤维混杂增强金属基复合材料,并利用统计学方法对比研究了在滑动速度为0.837 m/s、压力为196 N的条件下热处理对该混杂复合材料干摩擦磨损性能的影响。研究结果表明:铸态和热处理态复合材料的磨损率和摩擦系数均服从正态分布,铸态复合材料的磨损率和摩擦系数均值都大于热处理态复合材料,热处理有利于复合材料摩擦磨损性能的提高。铸态复合材料的磨损机制主要为犁沟磨损和层离,热处理后复合材料抗层离的能力增强,磨损机制主要为轻微的犁沟磨损。Abstract: An Al2O3f+Cf/ZL109 short fibers reinforced hybrid metal matrix composite was fabricated by squeeze casting.By means of the statistical research method,the effects of heat-treatment on the dry sliding friction and wear properties of the hybrid composites were investigated under the condition of 196 N load and velocity of 0.837 m/s.The results show that the wear rate and friction coefficient of both as cast and as heat-treated hybrid composite accord with normal distribution of probability density.The normal distribution functions of the wear rate and friction coefficient are of identical variance,but the average values of the wear rate and friction coefficient of as cast hybrid composite are greater than those of as heat-treated hybrid composite.Heat-treatment is beneficial to improving the dry sliding friction and wear property of the composite.The dominant wear mechanism of as cast hybrid composite is plough and delamination.Heat-treatment can improve the resistivity of delamination of composite.The dominant wear mechanism of as heat-treated hybrid composite is slight plough.
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Key words:
- metal matrix composite /
- hybrid /
- heat treatment /
- friction and wear /
- statistical research
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