包埋温度对N80套管钢渗铝层微观结构及性能的影响
Effect of Pack Temperature on Microstructure and Properties of Aluminized N80 Oil Casing Steel
黄 敏, 王 宇
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作者单位：(西安石油大学 材料科学与工程学院, 陕西 西安 710065)
中文关键字：N80套管钢； 包埋渗铝温度； 微观结构； 性能
英文关键字：N80 oil casing steel; pack aluminizing temperature; microstructure; property
中文摘要：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200 μm；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。
英文摘要：The aluminizing layer was prepared on the surface of N80 oil casing steel by pack aluminizing processing at 950 ℃ and 1050 ℃. The effects of pack temperature on the microstructure, microhardness and electrochemical corrosion resistance of as-aluminized N80 oil casing steel were studied. The results show that the as-prepared aluminizing layer with thickness over 200 μm at 950 ℃ and 1050 ℃ exhibit higher microhardness and better corrosion resistance than that of non-aluminizing N80 oil casing steel. Although the thickness of aluminizing layer and microhardness of aluminized N80 oil casing steel can be obviously improved by increasing the pack temperature, the property of N80 oil casing steel substrate decreases at a very high pack temperature.