TD法盐浴渗铌工艺及覆层性能研究
Research on Niobium Carbide Coating Process by TD Technique in Salt Bath and Properties of the Coating
孙启坤，王华昌
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作者单位：武汉理工大学材料科学与工程学院
中文关键字：TD技术；碳化铌覆层；表面强化；覆层性能
英文关键字：TD technique；niobium carbide coating；surface strengthening；coating property
中文摘要：进行了TD法盐浴渗铌工艺和覆层性能的研究。用不同材料在不同工艺参数下进行TD处理。测试分析了覆层的厚度、硬度、物相结构以及耐磨性、抗氧化性。结果表明：三种材料表面均形成了面心立方晶格的碳化铌覆层；基体成分、温度、时间以及工件位置均对覆层厚度有影响；覆层显微硬度可达3000HV0.05，使工件的耐磨性显著提高；在400 ℃以下时，碳化铌覆层具有较强的抗氧化作用。
英文摘要：Niobium carbide coating process by TD technique in salt bath and properties of the coating was studied.Three different substrates were selected to be treated with different process parameters.Thickness，hardness and crystal structure were tested and analyzed together with wear resistance and inoxidizability.The results show that niobium carbide coating with face-centered cubic lattice was formed on three different substrates；Substrate composition，temperature and time all have effects on the thickness of coating as well as the position of workpiece in system；The microhardness of niobium carbide coating reaches up to 3000HV0.05 and helps to remarkably improve wear resistance；The coating shows fairly good inoxidizability when the temperature is below 400 ℃.