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In recent years, in order to solve the shortage of raw materials, they buy a certain quantity of cold matte, miscellaneous copper as supplement, so that the structure of raw materials is more complex, in addition, the production and organization has become an complex activity because of using Isa smelting which have characteristics of fast production and high load[1] .
Making accurate prediction of production is needed urgently to the variety possibilities occurred in production and a complex material construction.
References: [1] Zhu Zuze, He Jiaqi, Modern copper metallurgy .Beijing, Science press.2003 [2]M.Nagamori and P.J.Mackey.
China nonferrous metal journal. 1996, 6 (4):21-28 [4] Goto S.
Shanghai science press. 1990 [6]Xiao Xingguo, Xie Yunguo, Bases of metallurgical reaction in engineering science.

Rectangular samples (with dimensions 30 mm×15 mm×3 mm) of Magnesium alloy AZ91 (Al 8.8 %, Zn 0.81 %, Mn 0.21 %, Mg rest) were used as substrate material.
References [1] Baril G, Pebere N, Corrosion Science Vol. 43(2001), p. 471 [2] Inoue H, Sugahara K, Yamamoto A, Corrosion Science Vol. 44(2002), p. 603 [3] Mathieu S, Rapin C, Steinmetz J, Corrosion Science Vol. 45(2003), p. 2741 [4] Zidoune M, Grosjean M H, Roue L, Corrosion Science Vol. 46(2004), p. 3041 [5] Altun H, Sen S, Materials and Design Vol. 25(2004), p. 637 [6] Zhang Y, Yan C, Wang F, Surface and Coatings Technology Vol. 161(2002), p.36 [7] Ma Y, Nie X, Northwood D O, Thin Solid Films Vol. 469-470 (2004), p. 472 [8] H.F.
Xu, Journal of Materials Engineering Vol.0 (2006), p. 29 (in chinese)

Introduction With the rapid development of science and technology, complex surface components have increasing applications in power, aircraft, aerospace and military industry.
Among these, ultrasonic testing has an important role due to its strong penetration, good direction, high sensitivity, low cost, and being harmless to the human body and the material of the components.
Among these are, e.g. the type, size, location and orientation of the defect, materials of inspected components, and environmental conditions.
Acknowledgements This paper is supported by Research Fund of Hunan Provincial Education Department (10C0362), National Natural Science Foundation in China (51005252), and the construct program of the key discipline in Changsha University of Science&Technology(Contract No.08-007).
Wei:Research on an ultrasonic NDT system for complex surface parts, Journal of Materials Processing Technology vol 129 (2002) ,p.667 [4] Hunter, A.

Mechanical Engineering College,Sichuan University of Science＆Engineering，Zigong 643000，China 2.
Processing content Processing methods Tool specification Feed(mm/min) 1 Processing boss shape Rough Pocket Toolpath φ12 plain cutter 1000 2 Removal of surface residual material Contour shape rough machining φ12 bull mill 800 3 Rough machining residual material Rough Parallel Toolpath Ф3 ball cutter 300 4 Clearance by face residual material Contour shape finish machining φ6 plain cuttre 400 3.2Machining and post-processing After generated the tool path, do simulated demonstration using Master CAM X system's physical processing analog functions (as shown in figure 3), timely find the existing problems and improve, minimize material consumption and improve processing efficiency.
Because it is a relatively new high technology, still existing relatively less person who can grasp skilled in this respect, so in the future talent cultivation it need to enhance this respect learning and application to adapt to the development and needs of manufacturing industries Acknowledgements This work was financially supported by The National Natural Science Foundation of China Youth Fund Project (51301115), The Training Project of Sichuan University of Science & Engineering(2012PY06) and teaching material construction project of Sichuan University of Science & Engineering (JC-1208).
Journal of Machine Design,2007,24(4):16-18(In Chinese) [5] Liu Yang, Chen Xi, Shi Geya, Wang jing.

Research on Preparation of Porous Silicon Powders from Metallurgical Silicon Material Yuping Li 1,b , Xiuhua Chen1,a* , Wenhui Ma2,c , Shaoyuan Li 2,d , Ping Bi1,e , Xuemei Liu1,f ,and Fuwei Xiang1,g 1Faculty of Physical Science and Technology, Yunnan University, Kunming, China 2State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming university of science and technology, China achenxh@ynu.edu.cn, byplsmile@126.com, cmwhsilicon@163.com, dlsy415808550@163.com, e1205635543@qq.com, fliuxuemei198911@163.com, g769970727@qq.com Keywords: Metallurgical silicon powder, Porous silicon powders (PSPs), Stain etching, MACE.
Lu, Reaction of porous silicon with both end-functionalized organic compounds bearing omega-bromo and omega-carboxy groups for immobilization of biomolecules, Journal Of Physical Chemistry B, 109(2005) 20620-20628
Lee, Effect of ultrasonic frequency on electrochemical Si etching in porous Si layer transfer process for thin film solar cell fabrication, Solar Energy Materials and Solar Cells, 95(2011) 77-80
[11] L.Volker, et al, Electrochemistry of Silicon: Instrumentation, Science, Materials and Applications, J. wiley VCH, 2002, pp24, 79, 52, 162 [12] Z.
Lee, Motility of Metal Nanoparticles in Silicon and Induced Anisotropic Silicon Etching, Advanced Functional Materials, 18(2008) 3026-3035

Prediction of the position on solidification end point of continuous caster Tingsheng Tu 1, a Hongliang Wang 2,b Zuosheng Lei 1 Zhongming Ren 1 1Shanghai Key Laboratory of Modern Metallurgy& Materials Processing, Shanghai University 2 Baoshan Iron and Steel Co., Ltd.
References [1] Byrne C, Tercelli C: Steel Times International, 2002,26(9),p.33 [2] Zeze M, Misumi H: Journal of the Iron and Steel institute of Japan,2001,87(2),p71 [3] YAO Shan: Iron & Steel, 2007,42(5),p.29 [4] Mostafa Alizadeh, Ahmad Jenabali Jahromi , Omid Abouali: Computational Materials Science, 2008 (44),p.807

Zhang: Journal of Materials Science, Vol. 37 (2002) NO.18, p. 3935-3943
Li: Materials Science Forum, Vol.532-533 (2006), p. 584-587
Ding: Key Engineering Materials, Vol.315-316 (2006), p. 15-19
Chen: Transactions of Materials and Head Treatment, Vol.27 (2006) No.1, p. 116-119(In Chinese)
Wang: Transactions of Materials and Head Treatment, Vol.Supp(2007), p. 41-45(In Chinese).

Smart and resilient concrete structures will require building materials such as cements that sense flaws.
Materials and Methods Preparation of Cement-Rice Husk Biochar Mix.
Chung, "Electrical conduction behavior of cement-matrix composites," Journal of Materials Engineering and Performance, vol. 11, no. 2, pp. 194-204, 2002
Chung, “Damage in cement-based materials, studied by electrical resistance measurement,” Materials Science and Engineering R, vol. 42, no. 1, pp. 1-40, 2003
Zou, “Influence of superfine ettringite on the properties of sulphoaluminate cement-based grouting materials,” Construction and Building Materials, vol. 166, pp. 723-731, 2018.

These metallic materials catalogues include Ti alloys, stainless steels and cobalt based alloys.
Subtractive techniques such as conventional milling often remove mass amount of materials to achieve the desired geometries.
Qazi:, submitted to Materials Science and Engineering C (2005)
Lam et al, Materials Science and Engineering C., 20, (2002) p. 49 [6] D.
Vezzetti, Numerical simulation of deposition process for a new 3DP printhead design, Journal of Materials Processing Technology, 161, (2005) p. 509 Fig. 4 - Green porous 3D Ti alloy specimens a) Rectangular Bars (Left) and Billets (Right) and b) Part of Skeleton System (Left) and Human Jaw (Right).

Hydration Dynamics of Portland Cement Studied by Magnetic Resonance SHE An Ming1, a, YAO Wu2, b and YUAN Wan Cheng1, c 1 State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China 2 Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Ministry of Education, Shanghai 200092, China a sheanming@gmail.com, b yaowuk@tongji.edu.cn, cyuan@tongji.edu.cn Key word: cement; hydration dynamics; relaxation time; low field NMR Abstract.
A complete and accurate understanding on the hydration dynamics would enable the engineers not only to predict the properties of concrete, but also to design new cement based materials.
Table 1 Chemical composition of cement w% Materials CaO SiO2 Al2O3 Fe2O3 MgO SO3 K2O MnO Cement 66.5 20.3 5.65 2.70 1.01 2.45 0.80 0.08 Table 2 Principal mineral compositions of cement w% C3S C2S C3A C4AF CaSO4 67.6 7.2 10.4 8.2 4.2 Test method.
Li: Journal of Wuhan University of Technology--Materials Science Edition vol. 25 [4] (2010), p.704
Yao: Science in China-Technological Sciences vol. 53 [6] (2010), p.1471