钢管加热炉新型炉内辊的设计与材料优选-材料工程专业论文.docxVIP

中南大学硕士学位论文 中南大学硕士学位论文 Abstract Abstract It is a general problem of poor sul-fao。quality of steel pipe resulted from adhesion of deciduous ferric oxide chips fill surfaces between 8ffamles$steel bloom and conveyer roller in mill furnace．Structural design and$electing materials was investigated in present paper9 which was need by姐improvement project of HengSteel Co．Ltd．． A model of mechanical behavior of sheet was employed to analyze cool of the molten ferric oxide，it revealed that steel-adhesion occurred until the SlLrface of the conveyer roller WaS heated up to temperature at 860℃．In this view,a new type of roller with inner surface cooled by water and the alga of outflow tube being larger than that ofinflow was designecL Results ofanalytical models showed that the structures and cooling types ofrollers Wel-e very important factors for steel-adhesion．Although the results of锄l如cal models and finite element method showed that the maximm thermal Stl[eSSeS wale more than 1200MPa,failure breaking of the roller did not occurred，which was contributed from thermal stress relaxation after that cracks occurred on the inner SllrfacAo ofthe roller． Relationships of wearing capacity—temperature and thermaJ stress，and that of thermal conductivity-temperature and wearing capacity for the conveyer rollers have been established in order to optimize parameters of structures and,select n州 materials． Basement ofall the above,the new type conveyer roller made ofheat-resistant steel including Cr,Ni and W has been successfully used in application． Keywords：Seamless steel pipe；Conveyer roller；Steel-adhesion,Temperature field；Thermal stress；Heat-resistant steeL n 原创性声明本人声明，所呈交的学位论文是本人在导师指导下进行的研究工 原创性声明 本人声明，所呈交的学位论文是本人在导师指导下进行的研究工 作及取得的研究成果。尽我所知，除了论文中特别加以标注和致谢的 地方外，论文中不包含其他人已经发表或撰写过的研究成果，也不包 含为获得中南大学或其他单位的学位或证书而使用过的材料。与我共 同工作的同志对本研究所作的贡献均已在论文中作了明确的说明。 作者签名：l啤 关于学位论文使用授权说明 本人了解中南大学有关保留、使用学位论文的规定，即：学校有 权保留学位论文，允许学位论文被查阅和借阅；学校可以公布学位论 文的全部或部分内容，可以采用复印、