調質軋延液對鋼品軋延磨潤及防銹抗油斑特性之影響

The Effect of Temper Fluids on the Rolling Performance and Surface Quality of Cold Rolled Steels

調質軋延目的除了消除碳鋼降伏點，防止加工時發生伸長性應變外，可藉由調質軋延矯正鋼帶形狀及改善表面粗糙度。另為達成自動車用高清淨性及高防銹性表面品質需求，可經由調質軋延液配方改善及防銹油相互作用，而影響軋延後鋼品防銹抗油斑特性。本研究經由界面活性劑、濕潤劑、防銹劑、磨潤劑等組成改善，已開發新型RL1C及RL1B調質液，經磨耗實驗評估，可提升約20 ~ 40%抗磨耗及軋延潤滑性，而經調質軋延產線試用後，軋輥磨潤性預估可提升約15%以上，每年降低50%換輥維修頻率。另外加塗冷軋防銹油後，可使鋼捲久儲防銹及抗油斑性由原來低於6個月，提升至一年以上。

A temper rolling process is an essential step to eliminate the yield point during forming and to adjust the surface quality of cold rolled (CR) steels, using wet rolling chemicals before a further treatment with anti-rust oil. In this article, tests and the respective results on newly developed temper rolling chemicals, RL1B and RL1C, formulated with surfactants, wetting agents, and antirust and anti-wear additives to improve the rolling performance are described. After rolling tests in the laboratory and in a temper mill with the new rolling chemicals RL1B and RL1C, it was found that rolling lubricity was significantly improved by 20% to 40% and the cleanness of the CR steel surface was increased by 10%. Another field test at one of the China Steel Corporation’s temper mills in 2007 showed that the lubricity of the working roller was increased by more than 20% and the repair frequency was decreased by 50%. In addition, based on the improvement in the rolling chemicals the anti-oil stain and anti-rust performance of CR steel coils during storage periods would be greatly enhanced from less than 6 months to over one year.