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Numerical simulation of temperature distribution and heat transfer during solidification of titanium alloy ingots in vacuum arc remelting process YANG Zhi-jun(杨治军), ZHAO Xiao-hua(赵小花), KOU Hong...; accepted 13 June 2010 Abstract: In order to get a better understanding of the vacuum consumable arc remelting (VAR) processes and thus to optimize them, a 3D finite element model was developed......
University of Science and Technology, Qingdao 266950, China; 2. Rizhao Steel Holding Group Co., Ltd., Rizhao 276806, China) Abstract: The plasma-remelting layer on the surface of AZ91D magnesium alloy was obtained by high energy density plasma beam treatment. The microstructure, composition, wear resistance and intensity of the plasma-remelting zone were characterized by X-ray diffractometer (XRD......
RESEARCH AND DEVELOPMENT OF NEW SUPERALLOY REMELTING PROCES W.Xie1 (1.Baosteel Group Shanghai No.5 Steel Co., Ltd., Shanghai 200940, China) Abstract:Shanghai No.5 Steel Co., Ltd.has recently introduced a set of 5-ton protective atmosphere electroslag remelting furnace and a set of 10-ton helium-cooling vacuum arc remelting furnace,both of them are the first one of its kind in China.With......
Plasma Nitriding of Low Alloy Sintered Steels Fakhreddin Ashrafizadeh1,Tom Bell2,Xiao-Ying Li2,Shiva Mansoorzadeh1 (1.Department of Materials Engineering, Isfahan University of Technology Isfahan, Iran;2.School of Engineering, Metallurgy and Materials, The University of Birmingham, Birmingham, UK) 摘要:Fe-3Cr-0.5Mo-0.3C and Fe-3Cr-1.4Mn-0.5Mo-0.367C sintered alloys were plasma nitrided......
Sensing controlled pulse key-holing condition in plasma arc welding JIA Chuan-bao(贾传宝)1, WU Chuan-song(武传松)1, ZHANG Yu-ming(张裕明)2 1. Institute for Materials Joining, Shandong...-holing, a new sensing and control system was developed for monitoring and controlling the keyhole condition during plasma arc welding (PAW). Through sensing and processing the efflux plasma voltage......
PHOTOCATALYTIC PERFORMANCE OF PLASMA SPRAYED TiO2-ZnFe2O4 COATINGS Y.Zeng1,W.J. Qian1,J.H. Gao1,J.T. Liu1 (1.Shanghai Institute of Ceramics, The Chinese Academy of Sciences, Shanghai 200050, China) Abstract:A novel TiO2-ZnFe2O4 coating is prepared by plasma spraying. The effects of spraying parameters and the composition of powders on the microstructure, surface morphology and photo-absorption......
Plasma surface alloying of titanium alloy for enhancing burn-resistant property ZHANG Ping-ze(张平则) 1, XU Zhong(徐 重) 1,2, ZHANG Gao-hui(张高会) 2, HE Zhi-yong(贺志勇) 2,YAO Zheng-jun(姚正军) 1 1.School.... In order to avoid this problem, burn-resistant alloying layers were made on the surface of Ti-6Al-4V and Ti-6.5Al-0.3Mo-1.5Zr-0.25Si titanium alloys by using double glow plasma surface alloying technology......
Numerical Analysis of Powder Properties in Low Power Plasma Torch AN Lian-tong1,GAO Yang1,Yan Zhi-jun1,HEI Zhu-kun1 (1.Marine Engineering Collage, Dalian Maritime University, Dalian Liaoning 116026, China) 摘要:A mathematical model was presented to describe the particle trajectory, velocity and temperature properties in the low power plasma spraying torch (3.6 kW)in which powder particles were......
NUMERICAL SIMULATION OF TEMPERATURE FIELDS IN ELECTROSLAG REMELTING SLAB INGOTS B.Z.Li1,L.Z.Chang1 (1.Department of Metallurgical Technology,Central Iron & Steel Research Institute,Beijing 100081,China) Abstract:The method based on transient heat transfer model is adopted to simulate electro-slag remelting process.The calculated results of the model show that the process is in the quasi-steady......
Precipitate-Accommodated Plasma Nitriding for Aluminum Alloys Patama Visittipitukul1,Hideyuki Kuwahara2,Tatsuhiko Aizawa3 (1.Department of Metallurgical Engineering, Chulalongkorn University... the strength and wear resistance of aluminum alloy parts in automotives. Long duration time as well as long pre-sputtering time are required for plasma nitriding of aluminum or its alloys only......