烘烤硬化钢热镀锌镀层450℃合金化退火模拟  

Alloying and Annealing Simulation of the Galvannealing of Hot-Dip Galvanized Bake-Hardenable Steel at 450 ℃

作　　者：张理扬[1] 张利祥[2] 

机构地区：[1]宝山钢铁股份有限公司冷轧厂,上海200941 [2]宝山钢铁股份有限公司研究院,上海201900

出　　处：《钢铁研究学报》2012年第9期33-39,55,共8页Journal of Iron and Steel Research

摘　　要：在实验室条件下模拟了烘烤硬化钢450℃下热镀锌镀层的合金化退火过程,研究镀层锌铁合金相的形成和转变过程、镀层相结构和镀层的抗粉化性能,并给出了所用的研究方法和主要研究结果。研究表明:镀层在450℃合金化退火,当保温时间延长到60～120s时,镀层内的δ相将会分为δ1k相和δ1p相两层,而且随时间延长,δ1k相增厚、δ1p相减薄,同时镀层表面柱状ζ相也有所减少,镀层抗粉化性能相应变差。The galvannealing of hot-dip galvanized bake-hardenable steel at 450 ℃ was simulated in laboratory.The formation and evolution of Zn-Fe alloy phase,coating phase structure and coating′s powdering resistance were studied.The results show that the δ phase in the coating will divide into δ1k phase and δ1p phase,when the steel sheets are galvannealed at 450 ℃ and the holding time is delayed to 60-120 s.Furthermore,the thickness of δ1k phase coating becomes higher with the time increasing,the thickness of δ1p phase coating becomes lower and the number of columnar ζ phase in the coating surface becomes less.At the same time,the coating′s powdering resistance becomes worse.

关 键 词：镀层 合金化 烘烤硬化钢 粉化 相结构 

分 类 号：TG156.2[金属学及工艺—热处理]