杨曦,马文,韩继鹏,高元明,占浩,陈伟东.工艺参数对超音速火焰喷涂Fe基非晶涂层性能的影响[J].热喷涂技术,2019,11(1):71~76.
工艺参数对超音速火焰喷涂Fe基非晶涂层性能的影响
Influence of Spray Parameters on the Properties of HVOF Sprayed Fe-based Amorphous Coating
  
DOI:10.3969/j.issn.1674-7127.2019.01.009
中文关键词:  超音速火焰喷涂  Fe 基非晶涂层  耐磨粒磨损
英文关键词:High Velocity Oxygen Fuel spraying  Fe-based amorphous coating  Wear resistance
基金项目:国家自然科学基金(51672136);内蒙古科技重大专项(2018-810)
                 
作者单位
杨曦 内蒙古工业大学
内蒙古自治区薄膜与涂层重点实验室
马文 内蒙古工业大学
内蒙古自治区薄膜与涂层重点实验室
韩继鹏 内蒙古自治区锅炉压力容器检验研究院
高元明 内蒙古工业大学
内蒙古自治区薄膜与涂层重点实验室
占浩 内蒙古工业大学
内蒙古自治区薄膜与涂层重点实验室
陈伟东 内蒙古工业大学
内蒙古自治区薄膜与涂层重点实验室
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中文摘要:
      Fe 基非晶涂层具有优异的耐磨、耐蚀性能,以及较高的性价比,适合在表面防护涂层领域广泛应用。本 文通过正交试验研究了煤油流量、氧气流量、送粉速率、喷涂距离对超音速火焰喷涂制备的 Fe 基非晶涂层的孔 隙率、硬度、耐磨性能的影响。采用图像法、显微硬度计和摩擦磨损试验机分别对 Fe 基非晶涂层的孔隙率、硬度、 耐磨性能进行了表征。采用 X 射线衍射仪和扫描电镜分别对涂层的相组成和显微结构进行了表征。通过极差分 析法分析得出以涂层孔隙率最低为目标的优化制备工艺,最佳喷涂工艺参数为:煤油流量 0.41 L/min,氧气流量 830 L/min,喷涂距离 430 mm,送粉速率 40 g/min。结果表明:送粉速率和氧气流量对涂层孔隙率影响较大,进 而影响涂层的硬度及耐磨性能。孔隙率随着氧气流量和送粉速率的增加而增加,随着煤油流量和喷涂距离的增加 而降低。制备的 Fe 基非晶涂层硬度达到 1158.9HV0.2,孔隙率为 1.22%,磨损实验的质量损失量只有 316L 不锈钢 的一半。
英文摘要:
      Fe-based amorphous coatings can be applied intensively in many industries to protect metal parts surface, due to their excellent wear resistance, as well as high cost performance. In this work, the influences of the kerosene flow rate, oxygen flow rate, powder feeding rate and spray distance on the porosity, microhardness and wear resistance of the HVOF sprayed Fe-based amorphous coatings were investigated, through designing orthogonal experiment. The porosity, microhardness and wear resistance of the Fe-based amorphous coatings were characterized by image method using Image-J software, microhardness tester, as well as abrasive wear tester, respectively. The phase compositions of the Fe-based feedstock and the as-sprayed correspongding coatings were analyzed by X-ray diffraction method. The microstructures of the Fe-based coatings were characterized by scanning electron microscopy.The spray parameters were optimzed in order to obtain the coating with minimum porosity by the range analysis. The optimized spray parameters were kerosene flow rate of 0.41L/min, oxygen flow rate of 830L/min, spray distance of 430mm and powder feeding rate of 40g/min. The experimental results showed that, the powder feeding rate and oxygen flow rate have a great influence on the porosity of the coating, which in turn affect the coating microhardness and wear resistance. The porosity of the coaitng increases with an increase of oxygen flow rate and powder feeding rate, and decreases with increasing kerosene flow rate and spray distance. The microhardness of the as-sprayed Fe-based amorphous coatings can reach 1158.9HV0.2, and the mass loss of the coatings after wear testing can be as low as half that of 316L stainless steel.
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