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of PFC gas has very low liquefaction temperature with moderate price and its GWP index is only 1/3 that of SF6. But recent research fastened on its arc extinction property [18] or regarded...J. Cent. South Univ. (2017) 24: 861-865 DOI: 10.1007/s11771-017-3488-7 Breakdown characteristics of CF4 and CF4/N2 hybrid gas in refrigeration temperature range HOU Meng-xi(侯孟希)1, LI Wei-guo(李卫国)1......
Materials and methods The study objects were regenerative hardfacing coatings, obtained by the method of tungsten inert gas. It is a method of (pad) welding with use of a non-fusible electrode... the use of computed tomography for the evaluation of hardfacing. The method used in this research is hardfacing by tungsten inert gas using alloy wires of wear resistant layers. This paper discusses......
properties and were less susceptible to corrosion than the arc welding counterparts. Recently, LIU et al [17-18] studied the underwater friction stir welding of 2219 aluminum alloy. The results showed...J. Cent. South Univ. (2012) 19: 2081-2085 DOI: 10.1007/s11771-012-1248-2 Underwater friction stir welding of ultrafine grained 2017 aluminum alloy WANG Kuai-she(王快社), WU Jia-lei(武佳蕾), WANG Wen(王文......
Microstructure and mechanical properties of TiN/TiAlN multilayer coatings deposited by arc ion plating with separate targets WEI Yong-qiang, LI Chun-wei, GONG Chun-zhi, TIAN Xiu-bo, YANG Shi-qin State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China Received 9 August 2010; accepted 14 January 2011 Abstract: TiN/TiAlN multilayer coatings......
was prepared by immersing a porous graphite in the molten aluminum above the liquidus temperature and introduced fine inert gas bubbles in the melt. The schematic diagram of the GISS process is shown... Trans. Nonferrous Met. Soc. China 20(2010) s981-s987 Semi-solid gravity sand casting using gas induced semi-solid process T. CHUCHEEP1, R. BURAPA3, S. JANUDOM1, S. WISUTMETHANGOON2, J......
热丝脉冲TIG堆焊Inconel 625成型质量优化与耐腐蚀性能研究(英文)郭龙龙1,郑华林1,刘少胡2,李悦钦1,徐小东1,冯春宇11. 西南石油大学2. 长江大学摘 要:基于中心复合试验设计方法,采用热丝脉冲TIG(tungsten inert gas arc welding)工艺,在AISI 4130基体上堆焊Inconel 625合金层.借助响应面法建立了焊缝几何特征与工艺参数之间的数学模型.根据优化后的工艺参数,获得了平坦,连续,无缺陷的多道两层堆焊层.堆焊层微观组织主要由柱状晶组成,在融合界面附近存在少量的平面晶与胞状晶,其顶部组织为等轴晶与转向晶.利用动态极化曲线法对基体与堆焊层的耐腐蚀性能进行了评价.结果表明:堆焊层的耐腐蚀性随着Fe含量的增加而降低,但增加堆焊层的层数可以显著提高耐腐......
by analytical electron microscopy [J]. Metallurgical and Materials Transactions A, 1984, 15: 783-792. [19] SHARMA S, TAIWADE R V, VASHISHTHA H. Effect of continuous and pulsed current gas tungsten arc welding... M. Improvement of microstructure and mechanical behavior of gas tungsten arc weldments of Alloy C-276 by current pulsing [J]. Acta Metallurgica Sinica (English Letters), 2015, 28: 208-215. [11] AKHTRP......
casting for predicting gas porosity [C]//STEFANESCU D, WARREN J, JOLLY M, KRANE M, ed. Modeling of Casting, Welding and Advanced Solidification Processes. Danvers, USA: TMS, 2003: 335-342. [10... Simulation of mold filling and prediction of gas entrapment on practical high pressure die castings ZHAO Hai-dong(赵海东), BAI Yan-fei(白砚飞), OUYANG Xiao-xian(欧阳晓贤), DONG Pu-yun(董普云) State......
Influence of La2O3 addition on microstructure and wear resistance of Fe-Cr-C cladding formed by arc surface welding周野飞1,杨育林1,齐效文1,姜永文1,杨健1,任学军2,杨庆祥11. State Key Laboratory of Metastable Materials Science & Technology, Yanshan University2. School of Engineering, Liverpool John Moores University摘 要:The Fe-Cr-C claddings formed by arc surface welding......
Microstructure and Wear Performance of High Volume Fraction Carbide M7C3 Reinforced Fe-based Composite Coating Fabricated by Plasma Transferred Arc Welding袁有录1,2,李铸国21. School of Materials Science... arc(PTA) welding was studied. The results showed that the volume fraction of carbide M7C3 was more than sixty percent, and the relative wear resistance of the coating tested on a block-on-ring dry......
