冷轧热镀锌板冲压锌层剥落原因分析  

Analysis on zinc coating exfoliation in stamping of cold rolled galvanization sheet

作　　者：王宝川[1] 李涛[1] 郑学斌[1] 金磊[1] 韩龙帅 杨建炜[1] 

机构地区：[1]首钢技术研究院,北京100043

出　　处：《塑性工程学报》2016年第5期168-172,共5页Journal of Plasticity Engineering

摘　　要：针对3种典型的冲压锌层剥落零件进行了锌层元素分布和形貌研究,分析了锌层剥落的具体原因并寻求解决的措施。结果表明,镀锌工艺前来料的表面碳氧化合物、夹杂物和合金化温度过高影响了热镀锌中间层的形成和锌铁合金不同相的比例,降低了锌层粘附性,最终导致冲压过程锌层的剥落。Via the analysis of the alloy elements distribution and the appearance of zinc coating,the possible reasons for three typical zinc coating exfoliation in stamping parts were studied.In addition,some measures to prevent coating exfoliation were also given.The result shows that the carbon oxides,inclusions in the surface of cold rolling sheet and excessive annealing temperature affect the forming process of intermediate layer and the ratio between different Ferro-Zinc phases,reduce the adhesion of the zinc coating and all these reasons result in the exfoliation of the zinc coating.

关 键 词：冲压锌层剥落 镀锌中间层 碳氧化合物 夹杂物 镀锌工艺 

分 类 号：TG156.2[金属学及工艺—热处理] TG386[金属学及工艺—金属学]