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The effect of soluble lubricant on surface imprinting in temper rolling by 4 Hi rolling mill

机译：4 Hi轧机回火中可溶性润滑剂对表面压印的影响

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摘要

The surface roughness of carbon steel sheets is controlled by dull roll surface imprinting by temper rolling. In most cases, temper rolling is performed using a lubricant or under a dry condition. However, the oil film of the lubricant and its lubricating ability have not been clarified. In this study, the effect of a lubricant on surface imprinting by temper rolling was investigated under the following three lubrication states: a dry condition (no lubricant), with a water-soluble lubricant and with a mineral oil. Temper rolling experiments for as-annealed low-carbon steel strips and as-annealed high-carbon steel strips were conducted in the reduction range of 1 to 3%, using the 4-high rolling mill. A shot-dull roll and an electric-discharged dull roll were employed as work rolls. The surface texture of temper rolled strips was observed directly, and surface textures in terms of the mean roughness (Ra), three-dimensional texture, cross-sectional profile, material ratio curve and probability density in order to compare the effect of the lubrication states. As a result, for high-carbon steel, the use of the water-soluble lubricant leads to better surface imprinting than the dry condition and the use of the mineral oil. The use of the mineral oil results in the least surface imprinting. For the low-carbon steel, the use of the water-soluble lubricant and the dry condition lead to better surface imprinting than the use of the mineral oil.
机译：碳钢板的表面粗糙度通过平整轧制的钝辊表面压印来控制。在大多数情况下，使用润滑剂或在干燥条件下进行平整轧制。但是，润滑剂的油膜及其润滑能力尚未弄清。在这项研究中，在以下三种润滑状态下研究了润滑剂对通过平整轧制产生的表面压印的影响：干燥状态（无润滑剂），水溶性润滑剂和矿物油。使用4高轧机，对退火后的低碳钢带和退火后的高碳钢带进行1至3％的压下率的回火轧制实验。抛丸辊和放电钝辊被用作工作辊。直接观察回火轧制带材的表面织构，并根据平均粗糙度（Ra），三维织构，横截面轮廓，材料比率曲线和概率密度对表面织构进行比较，以比较润滑状态的影响。结果，对于高碳钢，水溶性溶剂的使用比干燥条件和矿物油的使用导致更好的表面压印。矿物油的使用可使表面印痕最少。对于低碳钢，使用水溶性润滑剂和干燥条件会比使用矿物油产生更好的表面印记。

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