高速钢轧辊在2250mm热轧F5机架的应用
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摘要
针对某2250 mm热连轧下游机架轧辊耐磨性低导致带钢断面板廓不良的问题,采用在F5机架使用高速钢轧辊的方法进行改进。对高速钢轧辊使用过程中的表面质量、下机温度、辊形以及对轧制力的影响等方面与无限冷硬铸铁轧辊进行对比,结果表明高速钢轧辊经过两次服役后表面状态仍可保证带钢的板廓质量;高速钢轧辊散热性能较差,下机温度高且均匀性较差,需要采取一定措施来保证其温度和热凸度;高速钢轧辊磨损量以及局部磨损明显低于无限冷硬铸铁轧辊;使用高速钢轧辊时轧制力增大,应通过优化润滑来解决问题。利用辊系变形仿真模型分析了使用高速钢轧辊轧制的带钢板廓,得到了其板廓凸度和板廓波动性均较小的特点。
The high speed steel(HSS) roll was applied at F5 stand in 2250 mm hot strip mill in order to improve the strip profile quality which was related to the bad wear resistance of roll.The HSS roll was compared with the indefinite chilled cast iron roll by experimental measurement in terms of the surface quality,temperature after rolling,roll contour and rolling force.The results show that the strip profile quality is able to be guaranteed by the HSS roll after two times service cycle.Due to the poor heat dissipation performance of HSS roll,the high temperature and low temperature uniformity after rolling,some method should be taken to gurantee the temperature and thermal crown.The roll wear and local wear of the HSS roll are obviously lower than that of the indefinite chilled cast iron roll.The increase of rolling force when using HSS roll should be solved by the lubrication optimization.The profile of strip rolled using HSS roll was analyzed by the roll system deformation simulation model.It is shown that the contour and the fluctuation of the profile are small.
The high speed steel(HSS) roll was applied at F5 stand in 2250 mm hot strip mill in order to improve the strip profile quality which was related to the bad wear resistance of roll.The HSS roll was compared with the indefinite chilled cast iron roll by experimental measurement in terms of the surface quality,temperature after rolling,roll contour and rolling force.The results show that the strip profile quality is able to be guaranteed by the HSS roll after two times service cycle.Due to the poor heat dissipation performance of HSS roll,the high temperature and low temperature uniformity after rolling,some method should be taken to gurantee the temperature and thermal crown.The roll wear and local wear of the HSS roll are obviously lower than that of the indefinite chilled cast iron roll.The increase of rolling force when using HSS roll should be solved by the lubrication optimization.The profile of strip rolled using HSS roll was analyzed by the roll system deformation simulation model.It is shown that the contour and the fluctuation of the profile are small.
引文
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[16]柴箫君,张杰,李洪波,等.带钢热连轧非对称因素对板形的影响[J].工程科学学报,2016,38(5):726-733.CHAI Xiaojun,ZHANG Jie,LI Hongbo,et al.The effect of nonsymmetrical factors on strip shape in strip hot rolling[J].Journal of Engineering Sciences,2016,38(5):726-733.
[2]陈华,许焕宾,王雅明,等.高速钢轧辊在带钢热连轧机上服役机架的最优匹配[J].钢铁研究学报,2014,26(4):24-28.CHEN Hua,XU Huanbin,WANG Yaming,et al.High-speed steel roll in the hot strip mill on the best match of the service rack[J].Journal of Iron and Steel Research,2014,26(4):24-28.
[3]WALMAG G,SKOCZYNSKI R J,BREYER J P.Improvement of the work roll performance on the 2050 mm hot strip mill at Iscor Vanderbijlpark[J].International Journal of Metallurgy,2001,98(3):295-304.
[4]李耀辉,戚明星,郭德福,等.高速钢轧辊在马钢CSP前机架应用分析[J].钢铁,2010,45(10):61-65.LI Yaohui,QI Mingxing,GUO Defu,et al.High-speed steel roll in Masteel CSP front frame application analysis[J].Steel,2010,45(10):61-65.
[5]刘义学,于全成,侯刚,等.高速钢轧辊在热轧窄带钢精轧机组上的应用[J].轧钢,2005,22(5):65-67.LIU Yixue,YU Quancheng,HOU Gang,et al.The application of high-speed steel rolls in the hot-rolled narrow strip rolling mill[J].Rolling,2005,22(5):65-67.
[6]STRMER M,DAGNER J,MANSTETTEN P,et al.Real-time simulation of temperature in hot rolling rolls[J].Journal of Computational Science,2014,5(5):732-742.
[7]柴箫君,张杰,李洪波,等.热连轧高适应度工作辊温度场计算模型的研究[J].塑性工程学报,2017,24(4):36-41.CHAI Xiaojun,ZHANG Jie,LI Hongbo,et al.Study on the calculation model of the temperature field of work roll with high degree of adaptability in hot strip rolling[J].Journal of Plasticity Engineering,2017,24(4):36-41.
[8]魏宝民,侯彬,王松尧,等.R2级表面镀锡板平整过程轧辊粗糙度衰减控制技术研究[J].塑性工程学报,2017,24(3):142-147.WEI Baomin,HOU Bin,WANG Songyao,et al.Control technology of roll roughness attenuation for R2 grade surface tin plate in temper process[J].Journal of Plasticity Engineering,2017,24(3):142-147.
[9]滕洪宝,王晓东,程洋,等.热轧高强钢冷却板形控制技术的应用[J].锻压技术,2017,42(8):50-53.TENG Hongbao,WANG Xiaodong,CHENG Yang,et al.Application on cooling flatness control technology for hot rolling high strength steel[J].Forging&Stamping Technology,2017,42(8):50-53.
[10]AZENE Y T,ROY R,FARRUGIA D,et al.Work roll cooling system design optimisation in presence of uncertainty and constrains[J].CIRP Journal of Manufacturing Science and Technology,2010,2(4):290-298.
[11]NA D,MOON C,LEE Y.Thermal stress evolution of the roll during rolling and idling in hot strip rolling process[J].Journal of Thermal Stresses,2014,37(8):981-1001.
[12]FISCHER F D,SCHREINER W E,WERNER E A,et al.The temperature and stress fields developing in rolls during hot rolling[J].Journal of Materials Processing Technology,2004,150(3):263-269.
[13]TSUCHIHASHI T,SATO J,SHIRAISHI T,et al.Application of high-speed steel rolls to downstream stands in hot finishing mill[J].Research and Development Kobe Steel Engineering Reports,1998,48(1):10-13.
[14]ISHIKAWA J,YAMAMOTO H,KURITA T,et al.Application of high speed steel rolls to finishing stands in hot strip mills[J].Revue de Métallurgie,1996,93(7-8):899-906.
[15]张旭,苑光照,孙建林.铝板带轧制润滑作用机理及对轧后质量的影响[J].塑性工程学报,2017,24(2):212-216.ZHANG Xu,YUAN Guangzhao,SUN Jianlin.Lubricating mechanism in aluminum cold rolling and its effects on surface quality of aluminum strips[J].Journal of Plasticity Engineering,2017,24(2):212-216.
[16]柴箫君,张杰,李洪波,等.带钢热连轧非对称因素对板形的影响[J].工程科学学报,2016,38(5):726-733.CHAI Xiaojun,ZHANG Jie,LI Hongbo,et al.The effect of nonsymmetrical factors on strip shape in strip hot rolling[J].Journal of Engineering Sciences,2016,38(5):726-733.
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