Abstract: According to the quality issues including finger-mark proofing firm thickness un-uniform, roll marks sensitiveness to form marks etc. in production of chromium-free passivating and finger-mark proofing cold-rolled 0. 3 〜2. 5 mm sheet of DX15D +Z plain carbon steel at Shougang Cold Rolling Sheet Co, the process control measures such as stop of reverse coating of chemical coating machine, control of finger-mark proofing firm thickness of sheet and passivated roll marks etc. are put forward. Production results show that the sheet products salt spray corrosion resistance for 96 h, the surface electric resistance and the baking varnish adhesive etc. properties all meet the requirement.

摘要： 针对首钢冷轧薄板公司冷轧的0.3~2.5 mm无铬钝化耐指纹DX15D+Z普通低碳钢薄板生产过程出现的耐指纹膜厚度不均,辊印敏感形成印痕等质量问题,提出化学涂机逆涂报停、耐指纹膜厚控制、钝化辊印等工艺控制措施。生产结果表明,薄板成品96 h盐雾耐蚀性,表面电阻试验,烤漆附着力等性能均满足要求。

关键词: 热镀锌, 无铬钝化, 耐指纹, 膜厚, 开发