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文摘
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采用粉芯丝材和高速电弧喷涂技术制备高温氧化环境下抗冲蚀磨损FeCrAl／ WC涂层。用扫描电子显微镜、能谱仪和x射线衍射仪对FeCrAl／WC涂层的组织、成分和涂层表面冲蚀磨损形貌进行了分析。用自制的高温冲蚀磨损试验机对FeCrAl／WC涂层在不同温度、攻角下的冲蚀磨损性能进行了测试。结果表明，高速电弧喷涂 FeCrAI／WC涂层具有颗粒增强复合材料的层状组织特征。450℃以下，FeCrAl／WC涂层均呈现韧性冲蚀行为；90。攻角时不同温度以及650℃时不同攻角对FeCrAl／WC涂层的冲蚀行为影响不大。温度高于350℃，FeCrAI／WC涂层具有良好的全攻角冲蚀磨损抗力，650℃棱角状石英磨粒冲蚀条件下，FeCrAI／WC涂层的冲蚀磨损抗力为20g钢的1．94～2．03倍。探讨了FeCrAl／WC涂层高温冲蚀磨损机理。 |
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其他语种文摘
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A powder cored wire for FeCrAl/WC composite coating by high velocity arc spray technique was developed. The coating composi?tion , microstructure and phases were investigated by energy dispersive X-ray spectra, X-ray diffraction and scanning electron microscope. The ero?sion properties of FeCrAl/WC coating were examined with a self-devel?oped erosion test rig at elevated temperature. The FeCrAl/WC coating ex?hibits the lamellar characteristic of hard particles reinforced composite material. Erosion-corrosion resistance of FeCrAl/WC coating at elevated temperature is higher than that of 20g steel. Under oblique impact condi?tion, the relative erosion-corrosion resistance of FeCrAl/WC is 1.94 - 2. 89 times higher than that of 20 g steel at temperature of 650 t. It is found that the FeCrAl/WC coating exhibits typical erosion behavior of ductile materials below 450 t). It seems that test temperatures under inci?dence angle of 90° and the incidence angles of erodent at the temperature of 650 X. have little effect on the solid particle erosion behavior of Fe?CrAl/WC coating. The erosion-corrosion mechanisms of FeCrAl/WC coatings under elevated temperature were discussed. |
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来源
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焊接学报
,2004,25(3):75-78 【核心库】
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关键词
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热喷涂
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地址
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1.
河南科技大学材料学院, 洛阳, 471003
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装甲兵工程学院材料系, 北京, 100072
3.
中国科学院金属研究所, 沈阳, 110015
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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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0253-360X |
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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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国家自然科学基金
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国家自然科学基金
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文献收藏号
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CSCD:1643420
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