摘要
针对某公司热镀锌生产线出现的高强双相钢汽车板脱锌问题,进行原因分析和生产实践改善,通过扫描电镜和能谱,分析高强双相钢脱锌材料的抑制层微观形貌和去除镀层后的表面成份,并与不脱锌材料进行对比分析。相关理论已说明,未经过预氧化的双相钢,由于表面氧化物颗粒较多,其镀锌界面层抑制层颗粒生长不充分,未形成连续的抑制层会造成锌层附着性下降。此次分析结果表明另外一种情况,即在炉内高露点、氧化较强烈的情况下,钢板表面形成Fe的氧化膜较厚,在退火过程中未被完全还原,导致钢板与锌液反应引起Al含量下降,也会造成抑制层的不连续生成,锌层附着性明显下降的情况出现。
In response to the problem of zinc removal in high-strength dual phase steel automotive panels on a company's hot-dip galvanizing production line,this article analyzes the causes and improves production practices.Scanning electron microscopy and energy spectrum analysis are used to analyze the microstructure of the suppression layer and the surface composition after removing the coating of high-strength dual phase steel zinc removal materials,and compared with non zinc removal materials.The relevant theory has shown that dual phase steel without pre oxidation,due to the presence of a large number of surface oxide particles,has insufficient growth of inhibitory layer particles in the galvanized interface layer,and the lack of a continuous inhibitory layer will cause a decrease in the adhesion of the zinc layer.The analysis results indicate another situation,that is,in the case of high dew point and strong oxidation inside the furnace,a thick Fe oxide film is formed on the surface of the steel plate,which is not completely reduced during the annealing process,resulting in a decrease in Al content caused by the reaction between the steel plate and the zinc liquid,and also causing discontinuous generation of the suppression layer,resulting in a significant decrease in the adhesion of the zinc layer.
作者
汪仲华
李东辉
朱序涛
WANG Zhong-hua;LI Dong-hui;ZHU Xu-tao(Ansteel Guangzhou Automotive Steel Co.,Ltd,Guangzhou 511434,China)
出处
《世界有色金属》
2025年第20期217-219,共3页
World Nonferrous Metals
关键词
高强双相钢
抑制层
锌层附着性
球冲实验
High strength duplex steel
Inhibitory layer
Zinc layer adhesion
Ball impact experiment
