Sr变质对ADC12合金摩擦磨损性能的影响
发布时间:2018-04-24 20:42
本文选题:Sr变质 + ADC合金 ; 参考:《中国有色金属学报》2016年05期
【摘要】:利用MMD-1型销盘式磨损试验机,采用OM、SEM和EDS研究不同负载对Sr变质ADC12合金的摩擦磨损性能的影响,并探究其与合金显微组织及力学性能的关系。结果表明:当添加0.05%Sr(质量分数)时,合金显微组织中共晶Si相以颗粒状或纤维状均匀分布在晶界,富铁相则呈短棒状,此时合金力学性能最佳,且同一负载下其磨损量和摩擦因数均最低。当负载为100N时,因受到严重挤压变形,合金表面氧化膜发生破坏;基体合金以塑性屈服和严重剥层磨损为主要磨损机理;而当Sr添加量为0.05%时,合金的磨损程度最低,以粘着磨损和磨粒磨损为主要磨损机理,其摩擦磨损性能最优异。
[Abstract]:The effects of different loads on the friction and wear properties of Sr modified ADC12 alloy were studied by using MMD-1 type pin disk wear tester with OMSEM and EDS, and the relationship between them and the microstructure and mechanical properties of the alloy was investigated. The results show that the eutectic Si phase in the microstructure of the alloy distributes uniformly in the grain boundary as granular or fibrous when the addition of 0.05 Sr (mass fraction) is added, and the rich iron phase is in the shape of a short rod, and the mechanical properties of the alloy are the best. Under the same load, the wear and friction coefficient are the lowest. When the load is 100N, the oxide film on the alloy surface is destroyed due to the severe extrusion deformation, the main wear mechanism of the alloy is plastic yield and serious delamination wear, while the wear degree of the alloy is the lowest when Sr addition is 0.05%. Adhesive wear and abrasive wear are the main wear mechanisms, the friction and wear performance is the best.
【作者单位】: 南昌大学机电工程学院材料加工工程系;南昌市轻合金材料制备与加工重点实验室;
【基金】:国家自然科学基金资助(51364035) 教育部高等学校博士学科点专项科研基金联合资助课题(20133601110001) 江西省教育厅落地计划项目(KJLD14003) 党外专家博士产学研合作计划(2012-CYH-DW-XCL-002)~~
【分类号】:TG146.21
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