锻压技术

DX53D+Z镀锌板橘皮缺陷原因分析

英文标题：Reason analysis on orange peel defect of DX53D+Z galvanized sheet

作者：黄洁

分类号：TG386.4

出版年,卷(期):页码：2022,47(7):127-131

摘要：

针对某厂在以DX53D+Z镀锌板作为结构件进行冲压成形过程中发生的表面橘皮缺陷，采用金相显微镜、扫描电镜、能谱仪等设备对材料的宏观形貌、金相组织、显微形貌、力学性能等进行综合分析，从而探索出其橘皮缺陷的产生原因。结果表明：造成该批冷轧退火镀锌板产生橘皮缺陷的原因为铁素体晶粒出现混晶，晶粒明显大小不一，拉延时，混晶中大小晶粒变形彼此不协调，变形不够均匀，容易从粗大铁素体晶粒变形晶界处起裂，形成鱼鳞状分布、凹凸不平的粗糙表面缺陷即橘皮缺陷。

For the surface orange peel defect occurred in the stamping process of DX53D+Z galvanized sheet as a structural part in a factory, the macro morphology, metallographic structure, micro morphology and mechanical properties of the material were comprehensively analyzed by metallographic microscope, scanning electron microscope and energy spectrometer, and the causes of orange peel defect were explored. The results show that the reason for the orange peel defect of this batch of cold-rolled annealed galvanized sheet is that the mixed crystals appear in the ferrite grains, and the sizes of grains are obviously different. During drawing, the deformation of large and small grains in the mixed crystal is not coordinated with each other, the deformation is not uniform enough, and it is easy to crack from the deformation grain boundary of coarse ferrite grains, forming uneven and rough surface defect with fish scale distribution which is orange peel defect.

基金项目：

作者简介：黄洁（1992-），女，硕士，副研究员 E-mail：1490785693@qq.com

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