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陈庆强,赵志浩,王高松,朱庆丰,陶凯,朱成.Y含量对Mg-Al-Zn堆焊合金摩擦磨损性能的影响[J].稀有金属材料与工程(英文),2018,47(6):1812~1817.[Chen Qingqiang,Zhao Zhihao,Wang Gaosong,Zhu Qingfeng,Tao Kai and Zhu Cheng.Effects of Yttrium Addition on the Wear Resistance of Surfacing Welding Mg-Al-Zn Alloy[J].Rare Metal Materials and Engineering,2018,47(6):1812~1817.]
Effects of Yttrium Addition on the Wear Resistance of Surfacing Welding Mg-Al-Zn Alloy
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Received:August 04, 2017  Revised:October 25, 2017
DOI:
Key words: AZ91  surfacing welding  frictional wear  microstructure
Foundation item:国家自然科学基金资助(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)
Author NameAffiliation
Chen Qingqiang,Zhao Zhihao,Wang Gaosong,Zhu Qingfeng,Tao Kai and Zhu Cheng  
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Abstract:
      The surfacing welding is the common repairing technology and an effective way for the repair of local damage occurs at the magnesium equipment surfaces. The effects of varying contents of the yttrium on the dry sliding wear behavior of surfacing AZ91 magnesium alloys were investigated in this work. The results demonstrated that the surfacing AZ91 alloy without yttrium addition exhibited poor wear resistance, due to the massive intermetallic β- Mg17Al12 phases. With the addition of yttrium, wear resistance was improved resulting from the decrease of size and quantity of the β phase, which reduced the alloy hardness and decreased the subsurface metal deformation degree caused by friction. Three primary wear mechanisms were observed: abrasion, oxidation and delamination.