Search results

Study on the Properties of CrN Coating Prepared on 3Cr2W8V by Electron Beam Surface Alloying Process Yuan fang Chen1,2,a, Hong bin Xu2,b, Jian Jun Hu2,c,Liu chun 2,d 1 School of Materials Science and Engineering, Chongqing university, Chongqing ,China 2 School of Materials Science and Engineering, Chongqing university of technology, Chongqing, China achenyuanfang@cqut.edu.cn, bxuhb@cqut.edu.cn ,chujianjun@cqut.edu.cn , dliuchun@cqut.edu.cn Keywords: Surface Alloying; Microhardness ; Wear Resistance; Corrosion Behavior.
The tribological properties of mould materials decide the die longevity.
Experimental 2.1 Materials and processing The experimental material is 3Cr2W8V, it is a kind of hot die steel, the chemical composition is as followed: C0.30~0.40, Cr2.20~2.70,W 7.50~9.0, V0.20~0.50, Si, Mn≤0.40-wt%, the rest is Fe.
Materials Science and Engineering A, 2006, 438-440:558-562
[6] Ahmad M,Akhter J I ,Iqbal M et al ,Surface modification of Hastelloy C-276 by SiC addition and eltctron beam melting [J],Journal of Nuclear Materials ,2005,336:120-124 [7] Shi Qinian，Study on the Surface-Alloyed Disposal of Steel 45 Electronic Beam,[J]Journal of Huangshi Institute of Technology ，2007, 23（1）:16-19 [8] WU AiMin,Chen Jin son,Zhang aiming,A study on the die steel surface modification by electron beam[J],Nuclear Techniques，2002, Vol.25 ( 8) : 608

It is this unparalleled advantages that making laser direct deposition technique has great application value in the important industrial areas of aviation,aerospace,rare metal parts manufacturing and repair materials,functionally gradient materials, design and other manufacturing.
Substrate materials is copper, deposition parts is divided into ten layers and the property of every layer is the Graphite copper composite materials,graphite and copper thermal physical data reference literature[6],While the thermal physical parameters of each layer may be calculated based on composite algorithms of composite material.the graphite volume fraction increasing by 10% from the bottom up of deposition parts,and the graphite volume fraction of the first layer is 10%.
From Fig. 5 can also be learned the Z-Component of stress getting larger from top to bottom,and the risk of cracking is increasing from top to bottom.This is due to the substrate is at room temperature condition in the early of deposition , the depositing materials on substrate is rapid quenching by heat transfer,and leads to large tensile stress.with the material deposition,the temperature of the substrate is higher and the cooling rate of the material become gentle, so the tensile stress is smaller.In the same way,the X-Component of stress also showed the trend of gradually increases from top to bottom in Fig. 5,that is easy appear the crack of parallel to the Y direction.
Conclusion (1)Suitable control of the laser power benefits for each layer material to remelt
Acknowledgement This work was sponsored by the National Natural Science Foundation of China (51165008, 51265014),Science Foundation of Jiangxi Province Education Department (GJJ12282), Science Foundation of Jiangxi Province (2012BBE5001, 20122BDH80021), Key Laboratory of Ministry of Education for Conveyance and Equipment,East China Jiaotong University(11JD03).

Friction stir welding is a beneficial alternative for joining such materials.
Eng. 2016 [2] Landolt-Börnstein, Numerical Data and Functional Relationships in Science and Technology, Group VIII: Advanced Materials and Technologies, Volume 2 Materials, Subvolume C Metal Forming Data, Part 2 Non-Ferrous Alloys – Light Metals, H.
Materials 2019;12. https://doi.org/10.3390/MA12244211
Journal of Materials Research and Technology. 2020, 9(6), 14454 – 14466
Materials Science and Technology 2019, 2019, 1027–1033.

The band gap energy (Eg) of materials ranged from 4.1 to 2.9 eV.
The materials were heated at 70°C by 48 h to eliminate residual water.
The resulting fresh materials were then heated at 400, 600 and 800°C for 4 h in order to promote the decomposition of organic material.
López: Journal of Materials Chemestry, Vol. 12 (2002), p. 1. 2.
Torres-Martínez: Materials Science Forum, Vol. 510-511 (2006) p. 102.

The results show that, changing the body material from cast iron materials to cast aluminum materials, the body stress distribution trends are similar, but the cast aluminum body deformation increases; increasing the number of cylinder head bolts to 6 can reduce the deformation of the cylinder liner; a reasonable set of stiffeners can reduce the bearing bore deformation.
Perform finite element analysis of the S1110 original engine body, the material is cast iron HT200.
Conclusions (1) Changing the body material from cast iron materials to cast aluminum materials while the body structure is unchanged, the body stress distribution trends are similar, but the cast aluminum body deformation increases obviously.
(4) By changing the body materials, reducing the body wall thickness and a series of measures, the mass of the engine body is reduced from 38kg to 13.8kg and the mass ratio of the engine is reduced from 13.2kg/kW to 11.81kg/kW, approaching the mass ratio requirements of the new generation single-cylinder engine.
Xie, etal: Journal of Manufacturing Process, Vol. 5 (2003) No.2, p. 170~184 [2] JIA Wei-xin, HAO Zhi-yong, XU Hong-mei: Journal of Zhejiang University (Engineering Science), Vol. 42 (2008) No.2, p. 224~228 (In Chinese) [3] CAO Xiao-hui, JIANG Shu-li: Tractor&Farm Transporter, Vol. 33 (2006) No.5, p. 67~69 (In Chinese) [4] CAO Mo-li, BU An-zhen, LI De-tao, etal: Transactions of CSICE, Vol. 20 (2002) No.5, p. 448 ~453 (In Chinese) [5] Yang Liansheng: Internal Combustion Engine Design, (China Agricultural Machinery Press, China 1984) (In Chinese)

High-speed machining spindle Materials and Tools.
However, in this case, the materials for the experiment were metals.
In Advanced Materials Research (Vol. 426, pp. 223-226).
Materials Today: Proceedings, 4(8), 7476-7483
IOP Conference Series: Materials Science and Engineering 523 012078

Journal of Materials Processing Technology, 2008
Journal of Materials Processing Technology, Volume 198, Issues 1–3, 3 March 2008, 226–233, 2008
Journal of Materials Processing Technology, Volume 210, Issue 4, 1 March 2010, Pages 585–592, 2010
Journal of Materials Processing Technology,Volume 210, Issue 10, 1 July 2010, Pages 1364–1377, 2010
Journal of Materials Processing Technology, Volume 212, Issue 2, February 2012, Pages 450–4572012.

YUAN, Beam Deflection Measurement Using One-dimension Digital Image Correlation, Journal of Guangzhou University (Natural Science Edition), 2010, 9 (1): 54-56 [9] X.
YUAN, Polynomial Moving Fitting Method for Edge Identification, Advanced material research, 2011，308-310：2560-2564
YUAN, Digital Image Edge Detection Method in the Application of the Beam Displacement Measurement and Damage Detection, Advanced Materials Research, 2012, 487：221-225
YUAN, The Natural Bending Vibration of the Continuous Beam and the Impact Factor of Bridge, Applied Mechanics and Materials, 2011, 90-93: 1245-1249 [12] W.
LIU, Study on Wavelet Transform in Displacement Field De-noising of Simply Supported Beam, Journal of Guangzhou University (Natural Science Edition), 2010,9 (6) :50-53

Design of Interactive Virtual Laboratory based on VRML Technology Yuan Jiugen1, a, Xing Ruonan2, b 1 Education School, Jiangxi Science & Technology Normal University, Nanchang, China 2 Communication School, Jiangxi Normal University, Nanchang, China a yjgnine@163.com, bmary209@21cn.com Keywords: VRML; Interactive; Virtual Laboratory; Design Abstract.
With the development of science and technology, more and more advanced technology is applied to the field of education.
Journal of Materials Processing Technology，2004，155—156：1834-18389 [2] Li Li, Zhou Lei, Li Junhong.
Science Press, 2008

People pay more attention to polishing material and make deep research for it.
The reactor keeps constant temperature when the quantity of material is enough.
Acknowledgements This work was financially supported by the Major national science and technology special projects (2009ZX02308-001).
References [1] S.X.Lan，L.H.Yan and Y.H.Ping: submitted to Journal of the Chinese Ceramic Society (2008) [2] X.X.Feng，L.J.Bin and L.X.Cun: submitted to Journal of Tribology Transactions (2008) [3] HW.H.
Bin and P.G.Shun: submitted to Journal of Lubrication engineering (2004) [6] W.J.Bo: submitted to Journal of Rare metals (2000) [7] S.