纳米TiO2轧制液对硅钢冷轧性能的影响

分别采用传统冷轧轧制液和纳米TiO₂的冷轧轧制液,对无取向硅钢板进行了四辊冷轧实验.重点研究两种冷轧轧制液的轧制润滑性能和对轧后硅钢薄带表面质量和耐蚀性能的影响.通过场发射电子显微镜和能谱仪对使用两种轧制液轧后得到的硅钢薄带表面形貌和成分进行了分析.给出了轧制液中TiO₂纳米粒子在轧制过程中的抗磨减摩机理.在轧制载荷较高时,纳米TiO₂轧制液具有优良的轧制润滑性能并能显著改善轧后硅钢薄带的表面质量.同时在高载荷作用下,TiO₂纳米粒子被压入硅钢薄带基体,形成一个滑动系来支撑载荷,从而使润滑膜的耐磨性提高. 

Effect of nano-TiO2 rolling liquid on the cold rolling properties of silicon steel

Non-oriented silicon steel strips were rolled on a four-high cold rolling mill lubricated by a traditional cold rolling liquid and a nano-TiO₂ cold rolling liquid, with emphasis on studying the roiling lubrication performance of both the liquids and their effect on the surface quality and corrosion resisting property of the silicon steel strips. The surface micrograph and composition of the silicon steel strips after being rolled with both the liquids were characterized by field emission scanning electron microscopy and energy-dispersive spectroscopy. The anti-wear and friction-reducing mechanism of TiO₂ nanoparticles in cold rolling was given on the basis of experimental results. The nano-TiO₂ cold roiling liquid has excellent lubricant performance and can improve the surface quality of the silicon steel strips remarkably when rolled with heavy load. Meanwhile, TiO₂ nanoparticles are compressed into the silicon steel matrix by high load and a sliding system is formed to bear the load, leading to a higher wear resistance of the lubricant film.