热浸镀铝钢的合金层抗高温氧化机理  

Mechanism of High Temperature Oxidation Prevention of Alloy Layer on HotDip Aluminizing Steel

作　　者：郑毅然[1] 高文禄[1] 原国生 

机构地区：[1]东北大学表面技术研究所

出　　处：《东北大学学报（自然科学版）》1998年第1期26-28,共3页Journal of Northeastern University(Natural Science)

基　　金：国家科学技术委员会"九五"重点推广科研项目

摘　　要：研究了热浸镀纯铝和铝硅合金的钢板在５００～１１００℃，５０ｈ氧化试验期间抗高温氧化行为．借助电子探针显微分析仪和Ｘ射线衍射仪研究了合金层的组织结构．结果表明：镀铝钢的氧化动力学曲线符合抛物线规律；纯铝镀层的抗高温氧化性优于铝硅合金镀层；后者在高温氧化过程中形成Ｆｅ３Ｓｉ隔层相，降低了镀铝钢的抗高温氧化性．The high temperature antioxidation behavior of hotdipping Al and AlSi steel sheets is investigated in air over the temperature range from 500℃ to 1100℃ for up to 50 hours. Microstructures are examined by means of electronprobe microscope and Xray diffractometer. The results show that the oxidation kinetic curves of the aluminizing steels obey parabolic law and the oxidation resistance of Alcoated steel is significantly superior to that of AlSicoated steel. Because a Fe3Si barrier layer is formed in the AlSi alloy diffusion layer during oxidation,the high temperature oxidation resistance of hotdipping AlSi alloy steel sheet is reduced.

关 键 词：热浸镀铝 合金层 高温氧化 

分 类 号：TG174.443[金属学及工艺—金属表面处理]