曹甫洋,郝展良,王浩权,王资兴,廖俊,袁志钟,罗锐

• 1:江苏大学材料科学与工程学院
• 2:江苏集萃先进金属材料研究所
• 3:天工国际粉末冶金研究院

摘要(Abstract)：

选取5种不同的激光功率(1000、1200、1400、1600和1800 W)在Q235碳素钢表面制备铁基合金熔覆层，利用光学显微镜(OM)、X射线衍射(XRD)、扫描电镜(SEM)、电子背散射衍射(EBSD)技术、显微维氏硬度计和往复摩擦磨损试验机等研究了熔覆层的组织、力学性能和摩擦磨损性能。结果表明：熔覆层组织由枝晶内马氏体、枝晶间铁素体与部分残留奥氏体构成。随着激光功率的增加，熔覆层的厚度与稀释率增加，二次枝晶界面逐渐大量溶解，残留奥氏体量不断降低。当激光功率为1200 W时，熔覆层的平均硬度最高，为606.4 HV0.5,是基材硬度的3.6倍，磨损体积与磨损率最小，表现出良好的耐磨性能。熔覆层磨损机制是磨粒磨损与黏着磨损。

关键词(KeyWords)： 激光熔覆;铁基合金熔覆层;硬度;摩擦磨损

Abstract:

Keywords:

基金项目(Foundation): 湖北隆中实验室开放资金(2022KF-11);; 江苏省“双创博士”人才项目(1711220035);; 江苏大学高级人才启动基金(5501220008)

作者(Author): 曹甫洋,郝展良,王浩权,王资兴,廖俊,袁志钟,罗锐

DOI: 10.13289/j.issn.1009-6264.2023-0303

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