基于激光熔覆SiC/Ni复合涂层的耐磨性
Wear Resistance of SiC/Ni Composite Coating Based on Laser Cladding
查看参考文献17篇
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文摘
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采用预置粉末法,在Q235钢表面进行激光熔覆镍基SiC陶瓷涂层的实验研究。使用往复式磨损试验机对不同涂层材料的熔覆层进行干摩擦磨损实验,利用金相显微镜(OM),扫描电镜(SEM)观察和分析熔覆层的显微组织与磨损形貌。结果表明:在重载干滑动摩擦条件下,Ni基SiC复合涂层耐磨性得到显著提高;当复合粉末SiC含量为25%(质量分数)时,熔覆层耐磨性最佳;熔覆层的磨损机制以磨粒磨损为主,同时伴有黏着磨损特征,且随着SiC含量的增加,黏着磨损的特征愈加明显。 |
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其他语种文摘
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By using the method of preplaced powder, laser cladding of Ni-based SiC ceramics coating on Q235 steel substrate was studied. The dry friction and wear experiments of different material coatings were carried out by reciprocating friction wear tester. The microstructure and wear morphology of cladding layers were observed and analyzed using metalloscope (OM), scanning electron microscope (SEM) respectively. The results show that in the condition of dry sliding friction under heavy load, wear resistance of Ni-based SiC composite coatings is significantly improved. When the composite powder with 25% (mass fraction) SiC,wear resistance of cladding coatings is the best. Wear mechanism of the cladding layer is abrasive wear, accompanied by adhesive wear characteristics, and with the increase of SiC content, adhesive wear characteristics become more apparent. |
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来源
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材料工程
,2016,44(1):77-82 【核心库】
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DOI
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10.11868/j.issn.1001-4381.2016.01.012
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关键词
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激光熔覆
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SiC/Ni基复合涂层
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耐磨性
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强化机理
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地址
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中国农业大学工学院, 北京, 100083
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-4381 |
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学科
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金属学与金属工艺 |
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基金
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国家863计划
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文献收藏号
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CSCD:5611946
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