激光熔覆Fe基纳米Al2O3复合涂层的硬度及耐磨性.pdfVIP

MaterialHeat 下半月出版 Treatmentl材料热处理技术 激光熔覆Fe基／纳米A1203复合涂层的 硬度及耐磨性 张大伟，胡强，胡跃瑞，邱忠赛 (温州大学机电工程学院，浙江温州325035) 合金。组织观察和涂层硬度及干滑动摩擦磨损试验表明，三种纳米粉含量(1％，2％和3％质量分数)涂层都不同程度地改 善了Fe基合金熔覆层的硬度及耐磨性能．其中2％纳米颗粒含量涂层有较高的涂层硬度和较小的质量损失。硬度平均 提高了约100HV，质量损失平均下降约30％。耐磨性的改善被认为是与细小的Ot-AIl20，纳米粒子产生的细品强化和第 二相强化作用有关。 关键词：铁基合金；纳米∞A120，；激光熔覆；显微硬度；摩擦磨损 中图分类号：TGl74．44 文献标识码：A 文章编号：1001-3814(2010)24．0163．03 HardnessandWear ofFe—based／Nano·A1203 Properties CompositeCoating Laser Preparedby Cladding ZHANG Dawei。HU Qiang，HUYuerui，QIUZhongsai Engineering,Wenzhou325035，China) (SchoolofElectromechanical University，Wenzhou onlCrl8Ni9Tisteelsurfacewascarriedout Fe-based mixedwith Abstract：Laser cladding using alloypowder indifferent structure andthehardnessand slideweartestofthelaser analysis dry nano-A120，particlesproportions．The showthatthreekinds with all thehardnessand nano-A12031wt％，2wt％and3wt％，respectivelyimprove coatings ofcoatings wearresistanceofFe-based invarious hardnessandalittermasslossofthe with2wt％ alloylayers degrees，ahigher coating areobtained．Thehardnessvalueisincreased100HVandthemasslossisdecreasedabout30％．The llano-A1203 average by ofwearresistancehastOdowitllfine andsecond inducedthefme improvement grainstrengthen phasestrengthenby llano-A1203 particles．