Chengsong CUI
,
Zhenyu LI
,
Fuyang CAO
,
Qingchun LI
材料科学技术（英文）
A shape modeling of spray formed composite roll, which is utilized to predict the shape and dimension of roll during spray forming process, is developed in this paper. The influences of the principal spray forming parameters, such as the spatial distribution of melt mass flux, spray distance, rotating and translating speeds of substrate bar etc., on the geometry and dimension of spray formed product were investigated.
关键词:
YU Hailiang
,
LIU Xianghua
,
WANG Chao
,
Park Haedoo
钢铁研究学报(英文版)
The acting force on the roll system of Sendzimir mill was analyzed using 3D FEM. The roll gap pressure distribution and the acting force between rolls S and O, rolls O and I, rolls O and J, rolls I and A, rolls I and B, as well as rolls J and B were analyzed. The results showed that the roll gap pressure mainly affected the roll surface layer, 50 mm for backup roll; the roll gap pressure distribution is of double peaks among the work roll, the 1st intermediate roll (IMR), and the 2nd IMR; the maximum value of the roll gap pressure between the backup roll and the second IMR appears on the edge of the barrel of rolls; the component force presents the inparacurve distribution. These are important for reducing the wear of rolls and the break of the backup roll and guiding for production.
关键词:
roll gap pressure;Sendzimir mill;FEM
材料科学技术（英文）
With the development of the market, it becomes a demanding task for producers to make flexible production schedules to shorten production cycle. Schedule-free rolling is needed. If the CVC work roll of the F6 and F7 stands in certain 2050 mm hot rolled strip mill are substituted by flat roll (aim to SFR) and the strip profile is controlled by the existing bending force, the control ability is not adequate. This fact has been tested through on-line experiment and has been given in this article. The NBCM (new backup roll crowning method) is recommended to improve the profile control ability. Finally the plastic deformation of the strip and the elastic deformation of the roll are analyzed by employing coupled calculation of rigid-plastic finite element method and G-function method, and the optimal range of the crown of backup roll is given theoretically.
关键词:
SFR;NBCM;conventional roll;rigid-plastic FEM;G-function method;coupled calculation;crown control;shape
Chengsong CUI
,
Fuyang CAO
,
Zhenyu LI
,
Qingchun LI
材料科学技术（英文）
Modeling of heat transfer and solidification of composite roll was established and used to predict the thermal history and solidification process of roll during spray forming. Evolution of temperature field of the preform and cooling rate in the growing deposit during spray deposition and post-deposition were numerically simulated.
关键词:
L.H. Zhan
,
J. Zhong
,
X.Q. Li
,
M.H. Huang
金属学报(英文版)
A series of simulating experimental studies on the rheological behavior and its influential factors of aluminum alloy in continuous roll-casting process have been explored in this paper with a Gleeble-1500 Thermal-Mechanical Simulation Tester and a set of special clamp system. Relevant rheological rules in the process of coupling transient solidification and continuous deformation of roll-casting conditions are obtained. Experimental results indicate that four different characteristic stages exist in the whole rheological process, and relative constitutive models suitable for the given conditions of continuous roll casting process have been established through multivariable linear regression analysis of the experimental data.
关键词:
continuous roll-casting
,
null
,
null
LIU Jiawei
,
ZHANG Dianhua
,
WANG Junsheng
,
et al
钢铁研究学报(英文版)
In flatness of measurement system, the flatness roll deflection will have the disturbance to the flatness measuring signal. The flatness roller's stress is analyzed and the flatness roll deflection model is obtained by using the influence function method in this paper. The model is computed and gets the corresponding compensating curve. The results indicated that the compensated scheduled flatness is preferably accordant with the online rolling flatness, so the strip with good flatness can be obtained after the compensation
关键词:
flatness measure roll;deflection;influence function method;compensation curve
