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采用固体粉末包埋法对N80套管钢进行渗铝,形成富铝表层。研究了包埋温度为950、1050℃时所得渗铝N80套管钢的微观结构、硬度及电化学腐蚀特性。结果表明:不同包埋温度所得渗铝层厚度均超过200μm;渗铝N80套管钢在渗层深度范围内的硬度高于基体;渗铝后N80套管钢的耐腐蚀性得以提高。升高包埋温度可以显著提高所得渗铝层的厚度和硬度,但过高的包埋温度会同时造成基体性能更严重地下降。
N80 casing steel was aluminized with solid powder embedded method to form an aluminum-rich surface layer. The microstructure, hardness and electrochemical corrosion properties of the aluminized N80 casing steel obtained when the embedding temperature was 950 and 1050 ℃ were investigated. The results show that the thickness of aluminized layer obtained by different embedding temperature is more than 200μm. The hardness of aluminized N80 casing steel is higher than that of matrix in the depth of infiltrated layer. The corrosion resistance of N80 casing steel after aluminizing is improved. Increasing the embedding temperature can significantly increase the thickness and hardness of the resulting aluminized layer, but too high embedding temperature can result in more severe degradation of the matrix.