(哈尔滨工业大学433信箱,哈尔滨150001)
摘 要: 研究了A3钢采用熔剂法热浸铝时,温度、时间对浸铝层生长规律的影响。结果表明,表面层的生长过程具有“凝固溶解期”→“扩散增厚期”→“过渡平衡期”三个不同阶段,过渡层的生长符合指数增长规律。根据生长规律曲线提出了耐蚀、耐热用浸铝钢的选择规范。
关键字: 热浸铝 温度 时间 表面层 过渡层
(P. O. Box 433, Harbin Institute of Technology,Harbin 150001)
Abstract:Hot-dip aluminizing A3 steel has been investigated by optical microscopy, the investigation con-cerned with the affecting of temperature and time to the growth of hot-dip aluminizing coating. After hot-dip by flux method, it showed that the growth process of surface layer experiences three different periods, i.e."solidifi-cation-disolution period"→"diffusion-accretion period"→“transition-equlibrium period", the growth of transition layer coincides with exponent law. In addition,the choice criterion of the hot-dip aluminizing of the steel used in environment of corrosion and oxidation has been proposed in the light of the growth law.
Key words: hot dip aluminizing temperature time surface layer transition layer