304L不锈钢表面激光熔覆Fe-Cr-Si-P非晶涂层

稀有金属材料与工程, 2014, 43(2): 274-277.

304L不锈钢表面激光熔覆Fe-Cr-Si-P非晶涂层

1.中国石油大学(华东),山东青岛266580;中国石油大学重质油国家重点实验室,山东青岛266580

2.中国石油大学(华东),山东青岛266580

3.中国石油大学(华东),山东青岛266580

4.中国石油大学(华东),山东青岛266580

基金项目: Nature Science Founding of Shandong Province(Q2008F12) "863" Project(2012AA09A203) Fundamental Research Funds for the Central Universities(11CX04032A,11CX06069A)

关键词：激光熔覆 , 非晶涂层 , Fe-Cr-Si-P , 组织 , 性能

Laser Cladding Fe-Cr-Si-P Amorphous Coatings on 304L Stainless

Wang Yanfang ^1, , Lu Qinglong ^2, , Xiao Lijun ^3, , Shi Zhiqiang ^4,

1.中国石油大学(华东),山东青岛266580;中国石油大学重质油国家重点实验室,山东青岛266580

2.中国石油大学(华东),山东青岛266580

3.中国石油大学(华东),山东青岛266580

4.中国石油大学(华东),山东青岛266580

Keywords： laser cladding , amorphous coating , Fe-Cr-Si-P alloy , microstructure , properties

采用激光熔覆技术在304L不锈钢基体表面制备了Fe-Cr-Si-P非晶复合涂层.利用光学显微镜(OM)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、电化学测试系统和摩擦磨损试验机等分析了涂层的组织结构、相组成、耐蚀及耐磨等性能.研究结果表明,激光熔覆层组织主要由表层“梅花”形树枝晶区,中心非晶区和树枝晶结合区组成,熔覆层与基体呈现良好的冶金结合.熔覆层中除了非晶相外,还有少量Fe3P和Fe2Si等金属间化合物相.涂层的硬度HV0.2约为8000 MPa,是基体硬度的4倍；腐蚀电位Ecorr和自腐蚀电流密度icorr分别为-449.3 mV和-4.34 μA/cm2;在100 N载荷下摩擦系数仅为0.076,具有较好的综合性能.

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