SK85钢卷尺冷压成形开裂原因分析及改进
Analysis and Improvement of Cracking of SK85 Steel Tape in Cold Pressing Forming
王斌斌 1王玉明1
作者信息
- 1. 首钢京唐钢铁联合有限责任公司,河北 唐山 063200
- 折叠
摘要
针对客户反映的SK85钢卷尺开裂问题,在钢卷尺开裂处取样、脱膜后观察,并进行扫描电镜分析,发现开裂位置与外弧划伤完全重合,且划伤发生在淬火工艺之后.裂纹源位于划伤区域内,在冷压成形阶段,划伤受拉应力的作用,产生裂纹并扩展,最终导致完全开裂.与客户沟通,反查其冷压成形模具表面状况,发现外弧模具损伤较为严重.更换模具后,划伤和开裂情况得到解决.
Abstract
After observing the surface of the steel tape with the surface organic film removed,it was found that the crack location completely coincided with the scratch on the external radian surface,and the scratch occurred after the quenching process.Through SEM analysis,it was found that the crack source was located in the scratch area,which was subjected to tensile stress during the cold pressing stage,leading to the generation,propagation of the crack source,and ultimately complete cracking.
关键词
SK85钢/开裂/划伤/冷压成形/裂纹源Key words
cracking/scratch/cold pressing forming/crack source引用本文复制引用
出版年
2024
NETL
NSTL
万方数据