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This paper researches and analyzes the modeling of electro-hydraulic proportional servo system to improve the characteristics of forging hydraulic servo control system and meet their requirements of forging a variety of materials.
It is mainly used for forging various materials such as carbon steel, tool steel, alloy steel and high speed tool steel, cogging large forgings.
Beijing: Science Press, 1990:195-201
Journal of System Simulation, 2007: 66-68

Membranes can be made of different materials[3].
These materials have been observed in having the capability to be developed with a remarkable properties[6].
AzelleMillanod, "Fabrication and Characterization of Electrospun Polysulfone (PSF)/Organo-Montmorillonite (O-MMT) Nanostructured Membranes," Materials Science Forum, vol. 916, pp. 125-129, 2018
Cao, "Application and modification of poly(vinylidene fluoride) (PVDF) membranes - A review," Journal of Membrane Science, vol. 463, pp. 145-165, 2014
Zhang, "Preparation and characterization of poly(vinylidene fluoride) composite membranes blended with nano-crystalline cellulose," Progress in Natural Science: Materials International, vol. 3, no. 22, pp. 250-257, 2012

Kainer: Journal of Materials Engineering and Performance Vol. 13, 1 (2004), p. 7
Schwalbe, Mechanical Characterization of Materials.
Advanced Engineering Materials Vol. 8 (2005), p. 659
Kainer: Metallurgical and Materials Transactions A.
Kainer: Materials Science & Engineering A Vol. 488 (2008), p. 339

Experimental Materials.
Mallinson: Ageing Studies and Lifetime Extension of Materials.
Dulebová: The utilize of gamma radiation in the examination of mechanical properties of polymeric materials.
Journal of Materials Science: Materials in Medicine Vol. 12 (2001), p.1043-1047 [11] S.
Lang: Ageing behavior of polymeric solar absorber materials – Part 1: Engineering plastics.

Welding is essentially invaluable in materials joining processes.
As a mean of solving this problem, researchers have attempted to use multiple pass run to achieve structural homogeneity in materials that are thicker than 10mm [10].
Thesis, Dept. of Metallurgical & Materials Engineering, University of Lagos, Lagos, Nigeria. (2006) [11] Houldcroft, P.
Journal of manufacturing science and Engr .Vol 122, May2000 pg 310-582 [14] Dinnovitzer A: modeling weld hydrogen diffusion and predicting cracking in multipass welds.
Prince; Temper Bead weld HAZ property in A516-70 steel .Journal of Engineering materials and technology 1987 Vol 109 p 157-163

Introduction In recent years, High-resolution Transmission Electron Microscopy (HTEM) is one of the best methods for studying material structures.
It can supply massive amounts of information on micro-structures while the appearance of the material can be observed directly With a TEM, the transmission electron beam or the diffraction electron beam can be used separately to form images.
Journal of Central South University of technology, 1999(30)：371-373
Beijing: Science Press, 1990 [13] Jin Kuili chief editor.
Mining Science and Technology, 2010, 20(1): 47-52.

[4]John C.Ion:LaserProcessingofEngineerin Materials(ElsevierButterworth Heinemann U.K.2005) [5]E.
Sabbaghzadeh: Dissimila, Welding of Carbon Steel to574 Aluminum Alloy by Nd: YAG , Pulsed Laser, Materials and Design 31, (2010) 458_ 465
:Fundamentals of Materials Science and Engineering(John Wiley and Sons Inc 2001) [8]G.
Bhadeshia: Finite Element Simulation of Laser Spot Welding ,Science and Technology of Welding and Joining ,Vol.8, No.5 (2003) [10]Yunus A.
Asibu: Principles of Laser Materials Processing (John Wiley & Sons Inc U.S.A. 2009)

On one hand abrasive belts remove materials, on the other hand abrasive belts contact work-piece occur friction.
Beijing: Science press, 2002(9):19-24
Advances in Materials Manufacturing Science and Technology, 2009, 626-627:617-622
The Development of Cutter Location Algorithm for the 6-axis Simultaneous CNC Abrasive Belt Grinding Complex Surface, Key Engineering Materials, 2009, 416:375~380
International Journal of Advanced Manufacturing Technology, 2008, 35:1090-1099

Research on Life Cycle Assessment of Plastic Pipeline System Zhao Chunzhi1,2,3,a, Huang Mengchi1,3,b, Liu Yi1,2,3,c and Ma Liping1,2,3,d 1China Building Material Test & Certification Group Co., Ltd., Beijing,100024, China 2State Key Laboratory of Green Building Materials, Beijing 100024, China 3China Building Materials Academy, Beijing 100024, China achunzhizhao-1980@163.com, bhmc@ctc.ac.cn, c13581693466@163.com, dmlp@ctc.ac.cn Keywords: Plastic pipeline, PPR pipe, PE pipe, PVC-U pipe, Life Cycle Assessment.
This result shows that the environmental influence of PPR, PE and PVC-U pipes mainly depends on the raw materials required for producing pipes, so the key of plastic pipeline greening is to reduce the consumption of virgin resin.
In the water supply pipeline materials for Chinese towns in 1985-2012, application proportion of plastic pipeline is shown in Table 2.
[3] "National chemical building materials industry" fifteen "plan and the 2010 development plan", Construction Division (2007)217
Journal of Environmental Science 2010, 30 (10): 2136-2144

Subsequently, the American Society for Testing and Materials (ASTM) also carried out a series of atmospheric corrosion of aluminum alloy material work.
Because the result of accelerated test can be obtained in a short time, as well as can be used to speculate the possibility of long-term corrosion behavior of materials to some extent, analyze the influence and the law of one or several typical environmental factors on the corrosion of the material, the accelerated test get so many attention of scholars.
However, due to many effective factors of oceanic atmospheric corrosion, as well as the combined effects of these factors, the mechanism of the accelerated corrosion test sometimes differ from the mechanism of actual atmospheric corrosion of materials.
References [1] Xu Jiang, Wei Liu and Minxu Lu: Progress in Test Methods of Steel Corrosion in Marine Atmosphere (Corrosion Science and Protection Technology, 2007).
[8] Ming Liu, Jianping Cai, Xiaoyun Zhang, Feng Lu: Experimental Study on Acceleration Test of 2A12 Aluminum Alloy in Simulated Marine Atmosphere (Materials Engineering, 2010)