锰对扩散退火后热浸镀Al-Mn镀层抗磨粒磨损性能的影响  

Effect of Manganese on Anti-abrasion Performance of Al-Mn Coating Prepared by Hot-dip-aluminizing and Diffusion Annealing

作　　者：舒冠华 李新梅[1] 王攀[1] 

机构地区：[1]新疆大学机械工程学院,乌鲁木齐830047

出　　处：《材料工程》2015年第11期77-83,共7页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(51101132);新疆自治区自然科学基金资助项目(2013211A007)

摘　　要：采用SEM,EDS,XRD等方法分析经扩散退火后Al-Mn镀层的组织结构、元素成分及表面形貌。采用动载磨粒磨损试验机研究Al-Mn镀层的抗磨粒磨损性能,并探讨其磨损机理。结果表明:纯铝镀层主要是由Fe4Al13相和FeAl相组成,铝锰合金镀层表面主要是由MnAl6,Mn3Al10,Fe4Al13相组成;Mn含量接近共晶点的Al-2%(质量分数,下同)Mn试样抗磨粒磨损性能最好;纯Al、Al-2%Mn镀层的磨粒磨损是微观断裂(剥落)机理占主导地位,Al-9%Mn,Al-13%Mn镀层的磨料磨损主要是多次塑变(微观犁皱)引起的。The microstructure, elemental composition and surface morphology of Al-Mn coatings were analyzed by SEM, EDS and XRD after diffusion annealing. Anti-abrasion performance of alloy coating was studied by using dynamic abrasion tester, and then wear mechanism was discussed. The results show that pure aluminum coating is dominated by Fe4Al13 and FeA1 phases. Aluminum-manganese al- loy coating surface is dominated by phases including MnA16, MnaAl10 and Fe4Al13. The anti-abrasion performance of Al-2% （mass fraction, same as below） Mn sample which manganese content close to the eutectic point is the best. The abrasive wear of pure Al and Al-2%Mn sample is dominated mainly by microscopic fracture mechanism （spalling）, the abrasive wear of Al-9%Mn and Al-13%Mn sample is mainly caused by repeated plastic deformation （micro-plow）.

关 键 词：热浸镀 扩散退火 Al-Mn系合金 磨粒磨损 

分 类 号：TG174[金属学及工艺—金属表面处理]