Purpose

The last stage of the cold rolling process is skin-pass rolling and one of its most significant goals is to obtain appropriate topography on the surface of the sheet steel used extensively such as in automotive industry. The purpose of this paper is to investigate the effect of thickness change and various reduction ratios on roughness transfer of DC04 grade sheet material.

Design/methodology/approach

DC04 grade sheet materials with different reduction ratios and several thicknesses were subjected to skin-pass rolling process in the rolling equipment with a two-high roll. Some roughness parameters were determined as a result of roughness measurements from the surfaces of roughened sheet materials.

Findings

While the roughness transfer is higher in 1-mm thick material in reduction ratios up to 430 micrometers; in reduction ratios above 430 micrometers, it is higher for 1.5-mm thick materials. As the reduction ratio increases in DC04 grade sheet materials, the homogeneity of the roughness distribution in 1-mm thickness sheet material deteriorates, while the roughness distribution in 1.5-mm thickness sheet material is more homogeneous.

Originality/value

This paper demonstrates how material thickness and reduction ratio affect the roughness transfer in skin-pass rolling. The results obtained can be used by optimizing in manufacturing processes.

中文翻译：

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材料厚度和压下率对 DC04 级板材表面光整轧制过程中粗糙度传递的影响

目的

冷轧过程的最后阶段是平整轧制，其最重要的目标之一是在广泛使用的钢板表面获得适当的形貌，如汽车工业。本文的目的是研究厚度变化和各种压下率对 DC04 级板材粗糙度传递的影响。

设计/方法/方法

不同压下率、多种厚度的DC04级板材在二辊辊轧设备中进行表面光整轧制。一些粗糙度参数是由粗糙板材料表面的粗糙度测量结果确定的。

发现

而在 1 毫米厚的材料中粗糙度传递更高，压缩比高达 430 微米；在 430 微米以上的压缩比中，1.5 毫米厚的材料更高。随着DC04级板材压下率的增加，1mm厚板材粗糙度分布的均匀性变差，而1.5mm厚板材粗糙度分布更均匀。

原创性/价值

本文演示了材料厚度和压下率如何影响平整轧制中的粗糙度传递。获得的结果可用于优化制造过程。