| 摘要: |
| 在Q235低碳钢板上利用电弧喷涂工艺进行喷涂，以制得Fe65Cr20Mo7B3.5SiMn1.5W3涂层。喷涂材料为自行配制的丝材，按照35%的填充率将配好的粉填充到U型不锈钢外皮中，经过多道拉拔、挤压工艺制成Φ 2 mm的粉芯丝材。采用X射线衍射仪、扫描电镜、能谱分析仪、透射电镜对涂层的物相和组织形貌及成分进行了表征；采用差示扫描量热仪、显微硬度仪等设备对涂层的热稳定性及显微硬度进行了检测和分析。试验结果表明：涂层组织形貌呈典型的层状组织结构，由变形良好的带状粒子相互搭接堆积而成。涂层含有50.63%的非晶相，同时含有纳米级的晶相。涂层组织均匀、结构致密、孔隙率低，并且涂层硬度高达1 040.5 HV0.3，属硬质涂层，具有良好的热稳定性。 |
| 关键词: Fe基非晶合金涂层 电弧喷涂 微观形貌 热稳定性 显微硬度 |
| DOI： |
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| Fe65Cr20Mo7B3.5SiMn1.5W3 Coatings Prepared by Arc Spraying |
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LIU Min, FAN Zi–shuan
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北京科技大学 腐蚀与防护中心 表面科学与技术研究所， 北京100083
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| Abstract: |
| The Fe65Cr20Mo7B3.5SiMn1.5W3 coating on the surface of Q235 stainless steel is prepared by arc spraying process. The designed cored wires were selected as the spraying material. The powder was filled into the Utype stainless steel sheath with the filling rate of 35%. Then the cored wires with Φ 2 mm were obtained after the processes of drawing and extrusion. The microstructure, phase morphology and composition of the coating were characterized by several technolgies such as Xray diffraction(XRD), scanning electron microscopy(SEM), energy disperse spectroscopy(EDS) and transmission electron microscope (TEM). The thermal stability and micro hardness of the coating were detected and analyzed by differential scanning calorimeter (DSC), micro hardness tester and other equipment. The test results indicate that microstructure has typical layered structure which is deformed by the stack of good banded particles. The coating contains 50.63% of the amorphous phase, and nano crystalline phase. The coating has even and compact structure, low porosity, good thermal stability, and high hardness of 1 040.5 HV0.3. |
| Key words: Fe based amorphous alloy coating arc spraying thermal stability microhardness |
