水系調質圧延液の実用性能に関する検討

Abstract

Water soluble lubricants with practical performances are required in temper rolling process, such as promotion of surface roughness imprinting, prevention of micro-wear of work rolls, reduction of extraneous matters on a roll surface, rust proofing of a rolled steel sheet, without inhibition on performance of rust preventive oils used in next process, and selection of safety materials. However, the effects of water soluble lubricants on these practical performances have been reported in only a few studies. The reasons are as follows: (1) the effect of water soluble lubricants on each practical performance has been not clarified and (2) these practical performances can only be evaluated in detail after rolling with a long campaign.In this study, a water soluble lubricant with practical performances have been proposed and prepared. These practical performances of the new water soluble lubricant were compared to those of a commercially available soluble lubricant used in an actual temper rolling mill. The new water soluble lubricant is found to be superior to the commercial water soluble lubricant in almost every performances including roll micro-wear, surface imprinting, reduction of extraneous matters, without inhibition on performance of rust preventive oils, and safety. The new water soluble lubricant shows the rust proofing equaling to the commercial water soluble lubricant. Therefore, the new water soluble lubricant is considered to be applicable for actual temper rolling mills.