电沉积铬毛化工艺及影响参数的研究

来源期刊：钢铁钒钛2010年第2期

论文作者：谭勇 于晓中 刘常升 孙杰

文章页码：77 - 80

关键词：冷轧板； 电镀铬； 脉冲电镀； 轧辊； 毛化

Key words：cold rolled sheet； chrome-plating； pulse electroplating； roller； texturing

摘    要：常规的轧辊毛化工艺生产的毛化辊由于粗糙度衰减过快,使用寿命低,毛化冷轧辊表面形貌中凹坑多于凸起,不利于带钢对其表面粗糙度的复制。为了提高毛化冷轧辊的使用寿命,设计了一种在IF钢表面电沉积铬毛化的工艺:以脉冲电源为试验电源,以铬镀层的表面粗糙度Ra及硬度为考察对象,采用直流脉冲进行试验。试验结果表明,通过脉冲电沉积在850mA/cm²的电流密度下其Ra达到3.79μm,得到了具有一定粗糙度且结晶状态为半球状的铬镀层,实现了金属表面的毛化。通过脉冲电沉积工艺得到的毛化镀层其硬度(HV)达到1 000。

Abstract: The textured rollers produced by the conventional techniques have some disadvantage performances that include rapid roughness attenuation,limited use time and more pits on roller surface,which are not suitable for the formation of roughness on the cold roller surface.In order to increase the service life of the textured roller,a technique process was designed to electroplate chrome on the IF steel surface.The experiment of DC superimposed pulse was performed to obtain the certain roughness chrome textured and hemisphere-shaped chrome coatings.From the results,it was shown that the roughness and hardness of coating obtained by electroplating was 3.79 μm at 850 mA/cm² and 1 000 HV respectively.