Study on Localization of Working Roll for 5000 mm Width Thick Plate
Author of the article:LIU Di;PENG Hui;HU Bing;DAI Dewen;WANG Yanqing
Author's Workplace：State Key Laboratory of Roll Composite Materials Sinosteel Xingtai Machinery&Mill Roll Co.,Ltd.,Xingtai 054000,China;Baoshan Iron&Steel Co.,Ltd.,Shanghai 201900,China
Key Words：high nickel chromium cast iron inoculant wear resistance thick plate working roll
Abstract：
The problems that often appear in the preparation process of conventional high nickel-chromium working roll for thick plate were discussed,the external layer materials,casting difficulties and heat treatment technology were analyzed,and the materials and manufacturing technology of working roll for thick plate mill were studied.The results show that the outer graphite shape of the roller is spherical and the structure is fine.The core is bovine eye ferrite,and its structure and properties exceed the requirements of conventional high Ni-Cr working rolls.The abrasion resistance,thermal shock resistance and cold and hot fatigue resistance of the traditional high Ni-Cr working roll are better than that of the traditional high Ni-Cr working roll.The actual application of 5000 mm thick plate rolling line at Baosteel shows that the technical specifications of imported rolls are reached or exceeded.
