摘要
采用金相显微镜、X射线衍射仪和摩擦磨损试验机对A l-15Pb、A l-15b-5Si-0.2RE和A l-15Pb-5Si-2G-0.2RE合金的组织和耐磨性能进行了研究.试验结果表明:将合金液浇注到金属型中后,其凝固组织中,铅相呈粒状分布于铝基体中;加入硅后,硅相沿晶界偏聚;同时加入硅和石墨后,铅相、硅相均呈颗粒状分布,且Si相均匀分布,无偏聚.在三组合金中,随着硅和石墨的加入,摩擦系数逐渐减小,磨损失重逐渐减小,A l-15Pb-5Si-2G-0.2RE合金表现出较佳的耐磨性能.
The microstucture and wear-resising property of Al-15Pb,Al-15b-5Si-0.2RE and Al-15Pb-5Si-2G-0.2RE alloys were studied using metallogralphic microscope,X-ray diffractometer and friction wear testing machine.The results show that Pb phases distributed as grainess in the Al matrix after pouring the molten metal into the metal mould and silicon phases segregated along the grain boundary as silicon added into Al-15Pb alloy.When silicon and carbon all added in the Al-15Pb alloy,Si phase and Pb phase were all the grainess disstributing in the Al matrix,and Si phase distributed homogeneously without aggregation.In three alloys,the cofficient of friction and the weight loss in abrasion decreased with the addition of silicon and graphite,so Al-15Pb-5Si-2C-0.2RE alloy has the better wear-resisting property.
出处
《佳木斯大学学报（自然科学版）》
CAS
2010年第5期732-735,共4页
Journal of Jiamusi University：Natural Science Edition
基金
黑龙江科技学院人才引进基金资助(08-12)
