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Microstructure and mechanical properties of 22MnB5 Steel with different cooling method LIU Hongwei, YU Jingbo, ZHAO Hongyun, School of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, China lhw@hitwh.edu.cn, hityjb328@163.com, hy_zhao66@163.com Keywords: 22MnB5, cooling method, tensile strengths, microstructure Abstract.
(a) Original material (b) Air cooling (c) Metal die cooling (d) Water cooling Fig.2 Fracture structure at different cooling method The fracture structure at different cooling method are compared with the original material which is showed in Fig.2, there are large ductile dimple at the fracture surface of original material which is the typical ductile fracture, The fracture surface showed shallow dimple and quasi-cleavage fracture which is showed in Fig.2 (c) and (d), which are the form of brittle fracture.
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Magnetic behavior of ferromagnetic materials has been using to detect defects of materials.
Introduction Magnetic behavior of ferromagnetic materials has been using to detect defects of materials.
Materials and experiment method The material studied was Q235 carbon steel, which contains 0.12~0.20%carbon content.
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Analysis of Volcanic Materials The volcanic lithology is the main basis for the division of volcanic facies.
The fragments are filled with crushed materials.
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Magnetic fluid(MF) is a new functional material researched in recent years.
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Other materials such as insulation materials, plastic sealing ring and a plastic fan used in the motor production account for a small proportion so they are not considered in this study.
As shown in Figure 5, the total energy production process from raw materials production of vehicle body components is greater than material processing process.
The CO2 in the production process of raw materials is far greater than the emission in motor manufacturing process.
As is known, the materials used for copper smelting is copper sulfide concentrate, which contains large amount of S elements.
Environmental Sciences Europe (2012)

Materials and methods Raw material and pretreatment.
The raw material was taken about 50g for each experiment.
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Guniting can be used in the fire area with higher temperature or large concentration of harmful gas, spraying alkaline materials in the surface.
Sort combustible materials or use flame retardants.
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China 2School of Materials Engineering, Jinling Institute of Technology, Nanjing, Jiangsu 211169, P. 
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