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sizes of single-track laser deposition layer(a) and microstructure of multi-layer laser deposition(b) 图4 GH738合金修复区的显微组织 Fig. 4 Microstructures of repair zone of GH738 alloy 2.3 γ′相分... repaired by laser deposition 3 结论 1) 以减小熔深提高抗裂性能为原则,优化了工艺参数:激光功率P=800 W,扫描速度vs=4 mm/s,送粉速度vf=0.4 r/min,搭接率R=45%,层厚Z=0.5 mm,得到了熔合良好,无缺陷组织. 2) 采用GH536粉末激光沉积修复GH738合金基体,修复区组织为外延生长的柱状枝晶；相对于基体,热影响区中的γ′相数量明显......
J. Cent. South Univ. Technol. (2008) 15(s1): 197-201 DOI: 10.1007/s11771-008-345-8 Fabrication of micro carbon pillar by laser-induced chemical vapor deposition ZHOU Jian(周 健)1, LUO Yin-she(罗迎社... power from 0.5 W to 4.5 W and the pressure of the precursor gas from 225×133.3 Pa to 680×133.3 Pa, the experiments of laser induced chemical vapor deposition were proceeded for fabrication of micro......
Pulsed Laser Deposition of Boron Carbon Nitride Coatings侯清润,高炬摘 要:ＰｕｌｓｅｄＬａｓｅｒＤｅｐｏｓｉｔｉｏｎｏｆＢｏｒｏｎＣａｒｂｏｎＮｉｔｒｉｄｅＣｏａｔｉｎｇｓＨｏｕＱｉｎｇｒｕｎａｎｄＧａｏＪｕ(侯清润)(高炬)ＤｅｐａｒｔｍｅｎｔｏｆＰｈｙｓｉｃｓ,ＴｈｅＵｎｉｖｅｒｓｉｔｙｏｆＨｏｎｇＫｏｎｇ,Ｐｏｋｆｕ...关键词:......
Development of Electrospray Laser Chemical Vapour Deposition for Homogenous Alumina CoatingsTeiichi KIMURAJapan Fine Ceramics CenterState Key Laboratory of Advanced Technology for Materials Synthesis... deposition method,we prepared homogenous alumina coatings.We found that laser irradiation was effective in compensating the surface temperature decrease,and an alpha-alumina coating with dense columnar......
Effect of laser power and deposition environment on the microstructure and properties of direct laser metal-deposited 12CrNi2 steelChangtai Chi22. Institute of Metal Research, Chinese Academy of Sciences摘 要:Direct laser metal deposition was used for preparing blocks of steel 12CrNi2 using four different laser powers under two different deposition......
: A rectangular plate of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si titanium alloy was fabricated by laser melting deposition (LMD) technology. Macrostructure and microstructure were characterized by optical...; tensile properties; laser melting deposition 1 Introduction Laser melting deposition (LMD) manufacturing technology, a newly developed fabrication technology that combines the prototyping and laser......
coating with γ’/γtwo-phase microstructure was deposited by electron beam physical vapor deposition(EB-PVD),which worked as repairing the worn blade tips of single crystal blades.Nb molten pool was used...Improved mechanical properties of Ni-rich Ni3Al coatings produced by EB-PVD for repairing single crystal bladesJing-Yong Sun,Yan-Ling Pei,Shu-Suo Li,Hu Zhang,Sheng-Kai GongSchool of Materials Science......
treatment, chemical vapor deposition, and metallic cementation)[1-2]. Surface heat treatment with laser beam uses the characteristics of self-quenching that cools rapidly into materials without... Laser surface hardening of AISI H13 tool steel Jae-Ho LEE, Jeong-Hwan JANG, Byeong-Don JOO, Young-Myung SON, Young-Hoon MOON School of Mechanical Engineering, Pusan National University, Busan......
Laboratory of Materials Modification by Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116024, China) Abstract: Al62Cu25.5Fe12.5 icosahedral quasicrystal (IQC... diamond grinding agents, the surface seondary scratch is avoided, and easpecially, the new grinding material is found to deliver a ‘repairing’ effect on the marcoscopic surafce defects of pure Al. Key......
-y axis CNC gantry table. Cladding tracks were formed by moving the specimen relative to the beam in the x-direction. During deposition, the substrate displacement speed under the laser beam was 500... Laser engineered net shaping of Co-based superalloys XUE Chun-fang(薛春芳)1, DAI Yao(戴 耀)1, TIAN Xin-li(田欣利)2 1. Department of Mechanical Engineering, Academy of Armored Force Engineering, Beijing......
