扩散退火对热浸镀铝锰合金镀层组织结构及性能的影响  

Effect of Diffusion Annealing on Microstructure and Properties of Hot Dip Aluminum and Manganese Alloy Coating

作　　者：舒冠华 李新梅[1] 

机构地区：[1]新疆大学机械工程学院,新疆乌鲁木齐830047

出　　处：《热加工工艺》2015年第12期150-152,156,共4页Hot Working Technology

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：采用热浸镀工艺在Q235钢表面形成了Al-2%Mn、Al-13%Mn铝锰系合金镀层,对Al-Mn合金镀层进行了扩散退火处理,并分析了合金镀层的组织结构、表面形貌及抗磨料磨损性能。结果表明:经扩散退火处理后,镀层中的Fe2Al5消失,但出现了新的物相Al8Mn5及Al10Mn3;镀层表面形貌发生了较大变化,块状化合物消失,出现了瘤状物以及氧化腐蚀坑,而Al-13%Mn镀层氧化腐蚀更明显;镀层表面的硬度由830 HV增加到1100 HV左右;扩散退火不利于提高镀层的抗磨粒磨损性能。AI-2%Mn and Al-13%Mn alloy coatings were formed by the way of hot dip process on the surface of Q235 steel, and then Al-Mn alloy coatings were diffusion annealed. Microstructure, surface morphology and abrasive wear resistance of alloy coating were analyzed. The results show that：after diffusion annealing, Fe2Al5 of the coating disappears, but new phases which are Al8Mn5 and Al10Mn3 appear. Great changes have taken place in the coating surface morphology： massive compound disappears, nodules and oxidation corrosion pits appear. Specially, oxidation corrosion of Al-13%Mn coating is more obvious. The coating surface hardness increases from 830 HV to about 1100 HV. Diffusion annealing is not conducive to improve abrasive wear resistance.

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]