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一、前言 轧辊在热轧过程中,除承受轧制力外,还受到金属流动而产生的切向摩擦力,以及辊身500～600℃高温表面因冷却水的激冷而产生较大的热应力。因此,通常要求热轧辊具备足够的强韧性,耐磨性及抗热裂性。此外,还希望轧辊的硬度落差较小,减少修复时因表面车削而降低耐磨性;咬入性较好,使轧制过程得以顺利进行。 目前广泛使用的铸铁和铸钢两大类热轧辊都只能部分地满足上述要求。铸铁轧辊由于含碳量高、组织中存在游离石墨,因而具
First, the introduction Roll in the hot-rolled process, in addition to bear the rolling force, but also by the metal flow generated by the tangential friction, and the barrel 500 ~ 600 ℃ high temperature surface due to cooling water chilling and greater heat stress. Therefore, it is usually required that hot rolls have sufficient toughness, abrasion resistance and hot crack resistance. In addition, we also hope that the hardness of the roll gap smaller, reducing the repair due to surface turning and reduce wear resistance; bite better, so that the rolling process to proceed smoothly. Currently widely used two types of cast iron and cast hot roller can only partially meet the above requirements. Cast iron roll due to the high carbon content, the presence of free graphite in the organization