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Firstly, analysis was presented for the problem of material demand forecast.
It is the present realistic problem to control the definite reasonable order period in stock scientifically, and to raise management economic benefits Materials demand forecast can influence material supply and the level of management in stock in want factor.
To avoid blindness, it is needed to carry out estimating and the classification with reasonable science for material management.
Literatures take more and more pay attention to the control in stock and the forecast of the material science of spare parts.
Journal of Changchun University of Technology (Natural Science Edition), Vol. 28, No. 4, (2007), p.394-396 [2] Zaid T.

Wen: submitted to Journal of Materials Science & Technology (2010) [6] Y.
Wen: submitted to Materials Science and Engineering B (2010) [7] S.M.
Kuang: submitted to Journal of Materials Science & Technology (2010) [10] Y.
Wen: submitted to Materials Chemistry and Physics (2012) [11] J.S.
Kamble: submitted to Materials Research Bulletin (2008) [13] C.H.

Bending properties of four-layer biaxial weft knitted fabric reinforced composite materials Liangsen Liu, Yexiong Qi, Jialu Li Composites Research Institute of Tianjin Polytechnic University & Tianjin and Education Ministry Key Laboratory of Advanced Textile Composite Materials, Tianjin 300160, China email:qi_ye_xiong@163.com, fhcls@tjpu.edu.cn Keywords: Four-layer biaxial weft knitted fabric, composite materials, bending strength, bending modulus Abstract.
The bending properties of the FBWK fabric reinforced composite materials with different fiber volume fraction have been investigated.
The bending modulus and bending strength of FBWK reinforced composite materials have a great relationship with fiber volume fraction.
Within a certain range, the bending modulus and bending strength of FBWK reinforced composite materials increase with fiber volume fraction increases.
Sci. & Tech., 60(2000), p33 [4] Liangsen Liu, et al: Journal of Tianjin Polytechnic University, 20 (2001), p. 21

Preparation of AlN-ZrO2(Ca) composites by Pressureless sintering Yan Wanga, Ronglin Wangb, *, Jinglong Buc and Lixue Yud Hebei Provincial Key Laboratory of Inorganic Nonmetallic Materials, College of Materials Science and Engineering, Hebei United University, Tangshan 063009, Hebei, China a15176701185@163.com, bwrl@heuu.edu.cn,cbjl@heuu.edu.cn, yulx@heuu.edu.cnd Keywords: AlN; Ca-PSZ; Composites; Pressureless sintering; Performance.
Acknowledgements This work was financially supported by the National Natural Science Foundation of China (50872029) and Hebei Provincial Natural Science Foundation (E2010000960).
Wang: Journal of American Ceramic Society.
Kanzaki: Journal of Material Research.
Tajika: Journal of European Ceramic Society.

International Journal of Minerals, Metallurgy, and Materials 1995, 47 (12), 19–21
Journal of Materials Science 1998, 33, 2405–2412
Journal of Materials Science 2009, 44, 1934- 1951
Journal of Materials Science Letters 1999, 18, 201–203
International Journal of Refractory Metals and Hard Materials 2013, 41, 315–321

One part of ingots was obtained with the use of only primary aluminum, secondary raw materials and secondary raw materials with the addition of primary aluminum.
Tokarski, Mechanical Properties of Solid-State Recycled 4xxx Aluminum Alloy Chips, Journal of Materials Engineering and Performance. 25 (2016) 3252-3259
Chen, Influence of Extrusion Temperature on Microstructure and Mechanical Properties of Mg-3Zn-2.5Al-2.5Ca Alloy, Journal of Hunan University Natural Sciences. 44 (2012) 14-19
Wang, Relationship among grain size, texture and mechanical properties of aluminums with different particle distributions, Materials Science and Engineering A. 753 (2019) 122-134
Carlberg, Influence of Heat Treatment on the Surface Structure of 6082 Al Alloys, Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 48 (2017) 5085-5094.

Therefrom, the stainless wire mesh porous materials were inserted in the drying chamber and recirculation duct at PPI=8, 6 layers and PPI=8, 12 layers, respectively and used recirculation ratio 80%, it was found that SEC was lowest and decreased as about 62.21%.
Thanarat: Journal of industrial education Vol. 7(2) (2013), p. 81
Bundit: 13th Eco-Energy and Materials Science and Engineering Symposium, Thailand (2016)
Ahmadi: International Journal of Materials, Mechanics and Manufacturing.
Umphisak: UBU Engineering Journal Vol. 3(2) (2013), p. 9.

Journal of Materials Processing Technology Vol. 135 (2003) p. 258–265
Tsinghua Science And Technology.
Dimensional variations of castings and molds in the ceramic mold casting process Journal of Materials Processing Technology 189 (2007) p. 247–255 [4] H.
Journal of Materials Processing Technology Vol. 211 (2011) p. 181–186
Journal of material and design (28). pp. 272-277.

Computational Materials Science 24.3 (2002), pp. 361-379
Computational Materials Science 50.2 (2010), pp. 419-428 [14] H.
Computational Materials Science 79 (2013), pp. 368-376
Computational Materials Science 29.1 (2004), pp. 1-11
Computational Materials Science 47.2 (2009), pp. 314-319.

The research on the influence law of heat treatment on the tissue and properties of supercritical material has an important role in the correct selection of supercritical materials and improving the efficiency of turbine power generation further.
When materials are tempered at about 680 ℃, the decline of Rp0.2 and Rm is small, while the rise of A5 and AKv is sharp, improving material toughness.
When materials are tempered ranging from 680 ℃ ~ 700 ℃, the decline of Rp0.2 and Rm is small , while the rise of A5 and AKv is sharp, improving material toughness [6].
Engineering Materials, 2006, (10):88-90
Journal of Tsinghua University (Natural Science), 2008, 48 (11):1711-171