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FEM Simulation of the Slab Edge Rolling in Unsteady Rolling Stage Rui Ren1, a, Xiaoping Zhang1, b and Xiaozhong Du1, c 1Taiyuan University of Science and Technology, Taiyuan, China arenrui20090177@sina.com, bzxp_0007@tyust.edu.cn, cxiaozhong.du@163.com Keywords: Hot slab rolling, Unsteady rolling stage, Edge rolling, FEM simulation Abstract.
Bite stage and back-end whip stage of strip in hot rolling, especially unsteady material flow of the head and tail in rougher in edge rolling, will result in fishtail and width shrinkage and decrease incoming ratio.
The edge roll adopts analytical rigid model, while the slab material model adopt elastic-plastic of classical plastic theory.
Piber: submitted Stahl and Eisen(1980) [2] SW Xiong, Xianglin Zhu, Xianghua Liu: submitted to Journal of Plasticity Engineer(1996) [3] ChuanguoZhang, Jingtao Han, JiingLiu: submitted to Journal of plasticity engineering(2006) [4] Xuetong Li, Fengshan Du: submitted to Iron and Steel Vol. 40(2005) [5] Ginzburg V B, Guodong Wang: Steel Rolling Technology Theory and Practice, Beijing, 2002

But these models concern much about micro characteristics of material and are not convenient for engineering application [2].
The flow velocity of the supercritical fluid CO2, the properties and granule size of material are invariant. 1: CO2 bulb 2: Clarifier 3: Storage 4: High pressure frequency control pump 5: Flowmeter 6: Water bath heater 7: SFE kettle 8: Governing valve 9: Separation kettle Fig. 2 Flow chart of supercritical CO2 extraction test Considering the test specification of the test device, the levels of the factors A, B and C are listed in Table 1.
Komers: Chemical Engineering Science, Vol. 49 (1994) No. 15, pp. 2499-2505
Reverchon: The Journal of Supercritical Fluids, Vol. 10 (1997) No. 1, pp. 1-37
Farzad: The Journal of Supercritical Fluids, Vol. 38 (2006) No. 1, pp. 37-43

is elasticity modulus of materials.
In the contrary, when cutting flexible materials (such as low strength or hardness materials), we should choose horizontal elliptical cutting.
In the contrary, when cutting hard brittle materials, we should choose high vibration frequency.
That means if we grt a sharper cutting edge that it is easy to removal materials from the workpiece surface .
Therefore, vertical ellipse cutting is suitable for the hard and brittle materials and ferrous metals forming

Journal of Materials Engineering and Performance, 11(2002), p.19 [6] A.C.
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In the precise grinding of nano materials, the plastic removal mechanism dominated the process.
In precision grinding nano-materials, the dominant material removal mechanism was plastic deformation.
In the precise grinding of nanophase materials, the plastic removal mechanism dominated the process.
He, et al: Experimental Technique X-radial Diffraction(Shanghai science and technology Publications, China 1988) [5] Q.Z.
Hu: Journal of Guangzhou Chemistry Vol. 25/3(2000), p.33

Probably this is the only vice of those materials.
Materials The commercially available titanium as well as cobalt implant alloys were used as materials for investigation.
The coatings are well defined, cover the substrate materials well.
Muster: Materials Science and Engineering A 199 (1995), p. 53
Grądzka-Dahlke: Journal of Vibroengineering Vol. 8 (2006), p. 24

Journal of Environmental Management.
[3] Yuan, X.Y., et al., The Construction for Guarantee and Ability of Early Warning and Response of Water Pollution Emergencies in Wuhan City, China. 2009 International Conference on Environmental Science and Information Application Technology, Vol Ii, Proceedings. 2009, Los Alamitos: Ieee Computer Soc. p.175-177
Journal of Hazardous Materials 168(2-3): (2009), p.670-673
Burch, Lin.F T., Taihu Lake not to blame for Wuxi’s woe, Science 319, (2008) ,p. 158
Journal of Hazardous Materials 182: (2010),p. 130-135

Materials and Methods Materials The coal gangue samples collection and sample treatment This article refers to sampling for commercial coal (GB475-1996) to collected samples, and removed the surface of 0.2m.Each coal gangue set 4 sampling points, and uniform mixing.
(In Chinese) [2] Wen Wang, Xiangyou Gui: submitted to Journal of Industrial safety and environmental protection, 2002, 28(1):46～48.
(In Chinese) [3] Shuqing Liu: submitted to Journal of Soil 1996, 33(2):175～182.
(In Chinese) [4] Danli Xi, YuSheng Sun: Environmental Monitoring (China Higher Education Press, Beijing 2004 ) (In Chinese) [5] The values of China soil background (China Environmental Science Press, 1990.)
(In Chinese) [6] Jian Yang, Jiajun Chen, Xinyi Wang: submitted to Journal of agricultural environmental science, 2008, 27(3):873～878.

Therefore, transport of dangerous goods in the summer, accident prevention should be focused on risks in hazardous materials, vehicles, drivers and other aspects.
To develop a variety of special vehicles and special equipment, adopt new materials, new processes, new technologies, improve the mechanical, electronic level.
References [1]WU Zong-zhi; SUN Meng (Journal of Safety Science and Technology) in Chinese, 2006, 2(2):3~8; [2]GAO Jian-gang CHEN Hong-yun ZHENG Hao (China Safety Science Journal (CSSJ)) in Chinese, 2007, (8):17~21; [3]ZHANG Jiang-hua ZHU Dao-li; Prof.
(China Safety Science Journal (CSSJ)) in Chinese, 2007, 17(3):136~141; [4] XU Yong (Transportation Enterprise Management) in Chinese, 2007, (2): 33~34; [5] WANG Li; WU Fang (Technology & Economy in Areas of Communications) in Chinese, 2009, (3): 42; [6] LIU Xiu, WANG Chang-jun, LUO Jun-yi, GONG Biao (Road Traffic Management) in Chinese, 2007, (9): 62~65; [7] YU Zhan-bo (Truck & Logistics) in Chinese, 2007, (3): 9~11

Materials and Methods Test materials.
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Huang, et al .As-hyperaccumulation of Pteris vittata L. as influenced by As concentrations in soils of contaminated fields .Chinese Journal Of Environmental Science. 26(2005) 181-186.