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Depending on change the size to meet the strength and stiffness, service life of the roller is improved and materials is saved.
Material parameters and rolling parameters are shown in Table 1.
parameters material modulus of elasticity allowable stress Density Maximum rolling force Nominal diameter of roller value 40Cr 2.1*105MPa 160MPa 7.82*103/m3 30KN Table1 Material and parameters of roller Design variable The roller designed in this paper is based on the given roller size of φ 250 Y type mill .
The roller material is selected as alloy steel 40Cr.
Sun, W.Z Zhu: Journal of university of science and technology Beijing. 1999,21(4):372-375

Citation & Copyright (to be inserted by the publisher ) Homoepitaxial Growth of Al-doped 4H-SiC using Bis-Trimethylsilylmethane precursor Ho Keun Song 1, Myung Yoon Um 1, Hoon Joo Na 1, Dae Hwan Kim 1, In Bok Song 1, Sang Yong Jung 1, Jae Kyeong Jeong 1, Jae Bin Lee 2 and Hyeong Joon Kim 1 1 School of Materials Science and Engineering, Seoul National University, Seoul, 151-742, Korea 2 Korea Sangshin Electronic Co., Ltd., ChoongChungNam-Do, 339-814, Korea Keywords: 4H-SiC, CVD, BTMSM, TEA Abstract.
Currently, high power PiN diode and high frequency MESFET are the most attractive electronic devices using SiC material.
In order to solve this problem, we have used the novel organo-silicon precursor material, bis-trimethylsilylmethane (BTMSM, C7H20Si2).
Journal Title and Volume Number (to be inserted by the publisher) 3 expected to be the impurity effect on the step terrace.
Kim, Journal of The Electrochemical Society, Vol. 150 (2) (2003), p.

Materials and Methods Materials.
Journal of Molecular Catalysis A: Chemical Vol. 238 (2005), p. 192 [7] Xinchao Ruan, Mingyue Liu, Qingfu Zeng, Yanhua Ding.
Journal of Hazardous Materials Vol. 165 (2009), p. 789 [13] G.
Colloid & Polymer Science Vol. 264 (1986), p. 748

Elevation view of the pylon model Because model scale is 3:40, the similarity constant of material bulk density is 40/3.
That is the model material bulk density should be 12.333 times bigger than the prototype material.
References [1] X.Y.Chen and J.Z.Song: Journal of Changsha Communications University, 2004, 20 (1); 11-14
Zhang: China Railway Science, 2003, 23 (1): 88-93
[3] Y.J.Liu, J.Liu, J.P.Liu and S.F.Deng: China Civil Engineering Journal, 2010, 43(2): 72-78

Most of photo- chromic materials are organic such as woad, triphenylmethane, azobenzene, etc [2].
There is a considerable interest in the research and development of inorganic materials because they exhibited better characteristics than organic materials [3].
Smith: The Journal of Photographic Science.
Shen: Chinese Journal of Spectroscopy Laboratory.

(1) Where and are the material parameters.
Up till now, both functions of and have been completely solved. 3 Test and Data Process for GC4 Steel The tests are carried out actually according to Metal Materials Fatigue Crack Growth Rate Test Methods[1]. 3.1 Specimen and Test Conditions The tests are preformed using GC4 steel bars which quenched at 920°C, isothermal at 190°C for 1 hour, tempered at 260°C for 3 hour as-heat-treated.
References [1]GB/T6398-2000:Metal materials fatigue crack growth rate test methods(2000), in Chinese
[3]Lu Minxu,Zhen Xiulin:Journal of Chinese Society for Corrosion and Protection,Vol. 8(1994), p. 95-105, in Chinese
[8]Xiong Junjiang,Li Rui,Gao Zhentong: Journal of Experimental Mechnics,Vol. 13(1998), p. 111-114. in Chinese

In order to adapting to the advanced manufacturing technology, material objects need to turn CAD models by an approach.
Summary 1) By processing the point cloud data of the blade in Geomagic Studio 12, the blade model fitted with NURBS is gained, and by analyzing the deviation of 3D, the model gained is fundamentally accord with the material body, which provides a method to resolve those models of impellers or other relative works unable to complete directly by the technology of CAD. 2) The recovery of building model to material body of impeller by using Geomagic Studio 12 and SolidWorks, offers the support to analyze and research subsequently mechanics parameters of the impeller, and creates advantage for impeller redesign, and full shows that the combination of both soft has better application value to build CAD model of material body of complex geometry.
Acknowledgement This research project is supported by Natural Science Foundation of Anhui Educational Committee (KJ 2012B114).
[3] Chen Yu-qin, Cheng Si-yuan, Zou Fu-qun and Zhang Xiang-wei, in: Blade Repair and Surface Construction Based on Geomagic Studio, edited by Journal of Guangdong University of Technology(2011), in press
[6] Luo Zhi-jun and He Biao, in: Geomagic Studio Based Reverse Engineering Technology, edited by Journal of Guizhou University of Technology(2008), in press

Experimental study of squeeze casting of ZK60 magnesium alloy Zhihong GUO1, a, Shuwei QU2, b 1College of Materials Science and Engineering, North University of China, Taiyuan030051, China 2College of Mechanical Engineering and Automation, North University of China, Taiyuan030051, China aguozhihong@nuc.edu.cn, bshuweiqu1222@nuc.edu.cn Keywords: Squeeze casting, Microstructure, Mechanical properties, Pressure, Heat transfer Abstract.
Squeeze casting process is the result of search for materials with improved mechanical properties and new casting processes.
Introduction The automotive and aerospace industries have been the main driving force behind the search for materials with improved mechanical properties and in the search for new casting processes.
Magnesium alloys are among the best light-weight structural materials with a relatively high strength-to-weight ratio and excellent machinability and good stiffness, vibrational absorption, and castability.
Yue: Met Mater, Vol. 1(1989), p. 6 [2]A.Clegg: Foundry Trade Journal, Vol. 166(1993), p. 484 [3]S.

The method of obtaining materials by a mechanical synthesis (MS) of the initial powder mixtures of alloys [12] in the planetary ball mill (PBM) Pulverisette-7 was used.
Popovich, Functional Powder Materials: Collected articles, NTs PM.
Salahinejad, Journal of Materials Science, 44 (2009) 136-148
Shepatkovsky, Materials Science and Engineering A, 452-453 (2007) 575-583
Vil’danova, Materials Science and Engineering A, 392 (2005) 62-72

The relationship can be expressed as follows [3]: （3） where Jc0 and B0 are constants according to the material.
Acknowledgements This work is supported by the National Science Foundation of China (No.50977092), Chinese Academy of Sciences, and National Magnetic Confinement Fusion Science Program (2011GB112004).
Emmens, A fast algorithm for calculating the critical state in superconductors, Compel-the International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 20 (2001) 240-252
Coombs, Numerical solution of critical state in superconductivity by finite element software, Superconductor Science & Technology, 19 (2006) 1246-1252
Guorong, Comparative studies on dynamic behavior of superconducting levitation system with consideration of flux creep, Chinese Journal of Computational Mechanics, 24 (2007) 403-406