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Influence of Quenching Temperature on Microstructure and Properties of 40Cr Steel by Zero Time Holding quenching A.M.Li a and M.J.Hu b School of Materials Science & Engineering,Henan Polytechnic University, Jiaozuo 454000, China aanmingli2001@sina.com, bhumengjuan05@126.com Keywords: 40Cr steel, Zero time holding quenched, Tensile strength, Hardness, Microstructure Abstract.
Experimental Material and Methods Experimental Material.
Li: Journal of Coal Science & Engineering, Vol. 32,No.4(2007) 445-448
Journal of Fuxin Mining Institute, Vol.14, No.4 (1995) 54-58
Zhang and H.B.Yang: Journal of Henan Polytechnic University (Natural Science), Vol.25, No.1 (2006)1-5.

According to the energy band theory, the semiconductor materials of narrow band gap was preferable as the visible-light photocatalysts.
The nanocrystalline BiTaO4 is expected to be one kind of promising photocatalytic materials under solar irradiation.
Cao: Materials Letters, Vol. 68 (2012), p. 171 [2] P.
Tong: Materials Letters, Vol. 65 (2011), p. 450 [4] B.
Zhu: Journal of Physical Chemistry C.

Journal of Materials Processing Technology. 1998;77:278-84
Journal of Materials Processing Technology. 2008;201:460-5
Journal of Materials Processing Technology. 1996;56:54-65
Journal of Materials Processing Technology. 2001;118:29-35
Journal of Materials Processing Technology. 1993;39:165-77

Materials and Methods AISI 1050 steel was obtained in rod form from Ms.
Schaper, An investigation of the blanking process of the quenchable boron alloyed steel 22MnB5 before and after hot stamping process, Journal of Materials Processing Technology 212 (2012) 437– 449
Aqida, Optimization of quenching process in hot press forming of 22MnB5 steel for high strength properties , Materials Science and Engineering 50 (2013)
Liu, The finite element analysis of ductile damage during hot stamping of 22MnB5 steel, Materials and Design 69 (2015) 141–152
Journal of Chemical and Pharmaceutical Sciences.

The Boron Effect on Mechanical Properties of Aged 2024 Aluminum Alloy N.khatami 1,a, Sh.mirdamadi 2,b, H.Razavizadeh 3,c 1-Ms student, Department of Metallurgical and Materials Engineering, Iran university of Sience and tecnology,Tehran- Iran 2-Proffesor, Department of Metallurgical and Materials Engineering, Iran university of Sience and Tecnology,Tehran- Iran 3-Proffesor , Department of Metallurgical and Materials Engineering, Iran university of Sience and tecnology,Tehran- Iran ankh.nedakhatami@yahoo.com b- mirdamadi@iust.ac.ir c- hekmatr@yahoo.com Keywords: 2024 Aluminum Alloy; Precipitation Hardening; Tensile Strength; Aging Process; Al- B Alloy Abstract—2024 Aluminum Alloy is widely used in aeronautical applications.
Experimental Practical operations are carried out according to the following steps: Raw Materials: As per table No.1, the raw materials are pure 2024 Aluminum Alloy and B2O3 used for alloying.
[6] F.Sarioglu, F.O Orhaner, "Effect of prolonged heating at 130ºC on fatigue crack propagation of 2024 Al alloy in three orientations", Materials Science and Engineering A248 (1998) 115-119
[10] Yucel Birol, "Production of Al- B alloy by heating Al/KBF4 powder blends", Journal of alloys and Compounds 481 (2009) 195-198
[11] Xiaoming Wang, "The formation of AlB2 in an Al-B master alloy, Journal of Alloys and Compopounds 403(2005) 283-287,2005

Acknowledgment This project is supported by the National Natural Science Foundation of China (51175485).
References [1] Cheung MMS, Li W, Probabilistic Fatigue and Fracture Analysis of Steel Bridges, Journal of Structural Safety. 23 (2003) 245-262
[3] Xu Jinquan, Guo Fengming, Mechanism of Fatigue Damage Evolution and the Evolution Law, Journal of Mechanical Engineering. 46 (2010) 2
[4] Vang Jun, Damage Mechanics Theory and Application, Beijing Science publisher, 1997
[7] Rosa GLa, Risitano A, Thermographic Methodology for Rapid Determination of the Fatigue Limit of Materials and Mechanical Components, International Journal of Fatigue. 22 (2002) 65-73

Study about Disposal of Wastewater Contained Lead with Calamus Artificial Marsh Youming CAO a, Yuncheng XIE b,* College of Materials and chemical & Key Laboratory of Water Environmental Restoration, Chongqing University of Arts and Sciences, 402168 aemail :caoyouming121@163.com, bemail: dyxieyuncheng@sina.com, * Corresponding author Keywords: calamus, artificial marsh, wastewater with lead Abstract.
The purpose of this paper is to compare the effect of disposal of lead with calamus artificial marsh composed with sand and soil and the effect of calamus artificial marsh whose host materials are carbon residue and soil under different currency, and discuss the impact of host material to dispose the lead in waste water.
Journal of Liaoning University (Natural Sciences Edition), 2004, 31(3):279～283
Science of the Total Environment, 2007, 380（1-3）:247～258
An ecological investigation 0f water body organism s in Typha latifolia wetland [J].Journal of Shenzhen University Science and Engineering, 2007, 24(3):394～398

Three different materials in the form of powder, (samples A, B and C) are presented in this study.
It was demonstrated that materials labelled as: sample A and B are nano-powders.
Materials were composed mainly of LaNi5 with some amount of CeCo5, as well as AlNi and CoHex phases.
Upadhaya: Investigations of AB5-type hydrogen storage materials with enhanced hydrogen storage capacity, International Journal of Hydrogen Energy, 36 (2011)7114
Czerwiński: Characterization of metal alloy powder materials for metal-hydride anodes using thin-layer electrode approach, J.

Material and methods Material Preparation.
The SEM micrographs for the raw CS and RSP (see Fig. 2 (a) and (b)) show relatively smooth surface with no development of pores indicating non porosity of the materials.
A study by Agarry and Owabor [11] reported that high cellulose content biomass predominantly produced micropores materials, while high lignin yield in macroporous materials when converted to activated carbon.
Yagmur, Preparation of Low Cost Activated Carbons from Various Biomasses with Microwave Energy, Journal Porous Materials, Vol. 19, no. 6, (2012), p. 995–1002
Surani, Properties of Coconut Shell Activated Carbon, Journal of Tropical Forest Science, Vol. 25, no. 4, (2013), p. 497–503

Preparation and Wear Properties of (Al3Zr+ZrB2)P/2124 composites Material with In-situ Process Lei Jiao,Yutao Zhao1,a,Zhongzhong Zhang,YanWei Yang,Mingrui Zhang (School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China) azhaoyt@ujs.edu.cn Keywords: 2124 matrix metal composite, magnetic field, microstructure Abstract: With pulse magnetic field, it is use 2124-K2ZrF6-KBF4 as matrix metal to produce chemical reaction to gain (Al3Zr+ZrB2) p/2124 composite materials in this paper.
While the pure metal has failed to meet the developing requirements, it will be one of the tendencies of the development of the materials science to compound material.
Matched and grinding materials are 440C stainless steel whose hardness is 62 RC and diameter of 9.5 mm.
Tribology Theory, [M].Beijing:Tsinghua University Press, 2002:301 [5]Wang H Y, Jiang Q C, Zhao Y Q, et al．Fabrication of TiB2 and TiB2-TiC particulates reinforced magnesium matrix composites［J］.Materials Science and Engineering A，2004，372(1): 109-114
Chinese Journal of Rare Metals, 1999, 23(3): 214-219.