Y含量对Mg-Al-Zn堆焊合金摩擦磨损性能的影响  

Effect of Yttrium Content on Friction and Wear Resistance of Surfacing Welding Mg-Al-Zn Alloy

作　　者：陈庆强[1] 赵志浩[2] 王高松 朱庆丰[1] 陶凯 朱成[1] Chen Qingqiang;Zhao Zhihao;Wang Gaosong;Zhu Qingfeng;Tao Kai;Zhu Cheng(Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Shenyang 110819, China;Northeastern University, Shenyang 110819, China)

机构地区：[1]材料电磁过程研究教育部重点实验室,辽宁沈阳110819 [2]东北大学,辽宁沈阳110819

出　　处：《稀有金属材料与工程》2018年第6期1812-1817,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51204053);教育部项目基本科研业务费项目国家项目培育种子基金(N150904002);省科技项目重点实验室(LZ2015040)

摘　　要：研究了Y元素添加及其含量对AZ91焊丝堆焊Mg-Al-Zn合金室温下干滑动摩擦磨损性能及磨损机制的影响。结果表明:由于存在粗大β-Mg_(17)Al_(12)相,未添加稀土Y元素的AZ91堆焊合金的耐磨性能较差;通过添加稀土Y元素,可以减小粗大β相的尺寸和数量,减小亚表层变形层的厚度以及堆焊合金发生剥层磨损的程度,提高堆焊合金的耐磨性;稀土Y元素会导致堆焊合金的硬度降低;AZ91堆焊合金的主要磨损机制有3种:磨粒磨损、氧化磨损和剥层磨损。The effects of varying contents of yttrium on the dry sliding frictional and wear behavior of surfacing welding AZ91 magnesium alloys were investigated. The results demonstrate that the surfacing welding AZ91 alloy without yttrium exhibits poor wear resistance due to the massive intermetallic β-Mg（17）Al（12） phases. With the addition of yttrium, the wear resistance is improved because of the reduction in size and quantity of the β phase, which reduces the alloy hardness and decreases the subsurface metal deformation caused by friction Three primary wear mechanisms are observed： abrasion, oxidation and delamination.

关 键 词：AZ91镁合金 堆焊 摩擦磨损 显微组织 

分 类 号：TG146.22[一般工业技术—材料科学与工程]