摘要
通过试验跟踪和表面形貌状态检测,研究优质低碳碳素结构钢丝表面暗纹和暗斑产生的原因及形成机制。结果表明:当热轧线材表面氧化膜颜色均匀一致呈灰黑色时,成品钢丝表面不产生暗纹和暗斑;当热轧线材表面氧化膜因锈蚀或其他因素被破坏后,其表面在酸洗后即会产生不规则的暗纹、暗斑,并一直保留至成品钢丝。产生暗纹和暗斑的原因是线材表面氧化膜的不完整导致酸洗时基体腐蚀不均匀,没有氧化膜保护的基体在酸液中产生微坑,造成光线的大量散射,从而导致暗纹的出现。线材表面氧化膜因轻微锈蚀或变形脱落产生的暗纹和暗斑,经过电镀或电泳前的酸洗,能够完全去除,对电镀或电泳表面质量不造成影响;线材表面因严重锈蚀或机械擦伤所产生的表面缺陷,不能有效去除,对电镀或电泳表面质量将产生严重影响。
The reason and formation mechanism of dark fringe and dark spot produced on quality low carbon constructional steel wire surface was researched by experimental tracking and surface pattern condition testing. Results show that： when the oxidation film color of hot rolled wire rod surface was even and grayish black, there is no dark fringe and dark spot pro- duced on finished steel wire surface, when the oxidation film of hot rolled wire rod surface was destroyed for corrosion or other factors, the irregular dark fringe and dark spot was produced on its surface after acid pickling, which was kept to fin- ished steel wire. The reason of dark fringe and dark spot produced was incomplete oxidation film on wire rod surface, which caused uneven of matrix corrosion in acid pickling, the micro-pits produced in acid pickling in matrix without protection of oxidation film, which caused large light scattering and dark fringe occurring. The dark fringe and dark spot produced on wire rod surface oxidation film for slight corrosion or distortion and loss can be removed completely after acid pickling before electroplating or electrophoresis, which has not any influence on electroplating or electrophoresis surface quality. The fact that surface defects on wire rod surface produced by serious corrosion or mechanical scratch cannot be removed effectively will caused serious influence on electroplating or electrophoresis surface quality.
出处
《金属制品》
2013年第1期17-20,共4页
Metal Products
关键词
优质低碳碳素结构钢丝
暗纹
暗斑
腐蚀微坑
光线反射
表面质量
quality low carbon constructional steel wire
dark fringe
dark spot
corrosion pit
light reflection
surface quality
