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越大,轴向电弧吹力越大,焊缝熔深越深;随着丙酮的添加,电弧的氧化性降低,有利于提高焊接质量,丙酮含量为40% (体积分数)时焊接接头性能最好,焊缝组织比较均匀;接头热影响区存在不同程度的硬化和软化区域,这与轴向电弧吹力大小,电弧热量传导速度,热影响区组织中强化相转化以及时效状态密切相关. 关键词:7A52铝合金; 水蒸气等离子弧; 电弧介质; 电弧吹力; 微观组织; 7A52 aluminum alloy; vapor plasma arc; arc medium; arc force; microstructure; [全文内容正在添加中] ......
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Plasma and Gaseous Nitrocarburizing of C60W Steel for Tribological Applications A.Shafyei1,M.Mirjani2,F.Ashrafizadeh3 (1.Dept. of Materials Engineering,, Isfahan University of Technology, Isfahan, Iran;2.Iranian Surface Research & Engineering Centre (ISREC;3.Dept. of Materials Engineering, Isfahan University of Technology, Isfahan, Iran) 摘要:A comparison has been made between plasma and gas......
IMPROVEMENT OF DISPERSION ABILITY OF NANOMETER PARTICLES BY MEANS OF PLASMA POLYMERIZATION Y.M.LIU1,X.G.Guo1,G.Q.Zhang1,Y.J.Ge1 (1.Beijing Institute of Printing, Beijing 102600, China) Abstract... of plasma polymerization has been done. Some physicalbehaviors and chemical constitution of prepared film as well as the influence of poly-merized film on nanometer material were tested. All......
The Study of Plasma Nitriding of AISI304 Stainless Steel WANG Liang1,JI Shi-jun1,GAO Yu-zhou1,SUN Jun-cai1 (1.Institute of Metal and Technology, Dalian Maritime University) 摘要:This paper presents results on the plasma nitriding of AISI 304 stainless steel at different temperatures in NH 3 gas. The working pressure was 100~200 Pa and the discharge voltage was 700~800V. The phase of nitrided......
Trans. Nonferrous Met. Soc. China 26(2016) 806-813 Effects of current density on microstructure and properties of plasma electrolytic oxidation ceramic coatings formed on 6063 aluminum alloy Nan...; accepted 26 August 2015 Abstract: Plasma electrolytic oxidation (PEO) ceramic coatings were fabricated in a silicate-based electrolyte with the addition of potassium fluorozirconate (K2ZrF6) on 6063 aluminum......
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is achieved by vacuum hot extrusion (VHE). Key words: mechanical alloying; aluminum alloy; nanocrystalline alloy; amorphous; spark plasma sintering; hot extrusion 1 Introduction Recently, Al alloys... was consolidated by vacuum hot press sintering and spark plasma sintering (SPS) under different process conditions. The microstructure and morphology of the powder and consolidated bulk sample were examined......
Trans. Nonferrous Met. Soc. China 25(2015) 1944-1949 Effects of Al and N plasma immersion ion implantation on surface microhardness, oxidation resistance and antibacterial characteristics of Cu Quan...., Ltd., Changzhou 213200, China Received 20 June 2014; accepted 4 November 2014 Abstract: Al and N were introduced into copper substrate using plasma immersion ion implantation (PIII) in order......
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