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of Technology, Lanzhou 730050, China) Abstract: Partial remelting is the important part of semi-solid metal (SSM) ingots forming technology. The non-dendritic microstructure evolution process and mechanism of Mg-6Zn-1Cu-0.5Ce magnesium alloy during partial remelting were investigated by isothermal heat-treatment. The results indicate that the eutectic phases of Mg-6Zn-1Cu-0.5Ce alloy initial......
; accepted 28 July 2014 Abstract: A novel process that combines squeeze casting with partial remelting to obtain AZ61 magnesium alloy with semi-solid microstructures was proposed. In this route, the squeeze casting was used to predeform the magnesium alloy billets to obtain small dendritic structures. During subsequent partial remelting, small dendritic structures transform into globular grains......
of Technology, Lanzhou 730050, China)Abstract:The non-dendritic microstructure evolution process and mechanism analysis of ZA74 magnesium alloy during partial remelting were investigated by isothermal... mechanisms are the eutectic microstructure solution, solute diffusion, coarsening, dendrite separation, spheroidization and final coarsening during partial remelting. Furthermore, the appearance......
Trans. Nonferrous Met. Soc. China 26(2016) 1564-1573 Microstructural evolution and phase transformation during partial remelting of in-situ Mg2Sip/AM60B composite Su-qing ZHANG, Ti-jun CHEN, Fa-liang... September 2015 Abstract: The microstructural evolution and phase transformations during partial remelting of in-situ Mg2Sip/AM60B composite modified by SiC and Sr were investigated. The results indicate......
响,适当降低铸造冷却速率,即采用石墨模能提高二次重熔组织的均匀性和稳定性. 关键词:ZK60镁合金;近液相线铸造;部分重熔;微观组织 中图分类号:TG146.2;TG292 文献标志码:A Partial remelting of semi-solid metal ingots of ZK60-2Ca magnesium alloy CAO...: Partial remelting is the important part of semi-solid metal (SSM) ingots forming technology. In order to obtain small and round grain organization microstructure, the microstructure evolution of ZK60......
基于虚拟力弹簧方法的Partial Finger动力学建模与仿真杨会生1,姜力21. 中国科学院长春光学精密机械与物理研究所2. 哈尔滨工业大学摘 要:为了掌握Partial Finger的运动学规律和动力学特性,判断其结构参数对Partial Finger使用性能的影响,准确评价其真实的工作状态,根据Partial Finger的机械结构,建立了基于虚拟力弹簧方法的Partial Finger动力学模型,并利用Matlab软件对所建立的动力学模型进行数值求解,通过对比相同工作状态下的动力学模型以及Adams仿真结果,初步确定虚拟力弹簧的弹性系数量级取104N/mm时,动力学模型和Adams仿真所得结果一致,证明动力学模型正确,并为Partial Finger机械结构的进一步设计,完善提供了理论依据......
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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......
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......
states were investigated. A new method, cyclic closed-die forging (CCDF), was employed to deformation of AZ80 as a recrystallization and partial melting (RAP) process. During partial remelting, finer... temperature. Fig. 1 Schematic of cyclic closed-die forging (CCDF) The microstructure evolution during partial remelting in the semi-solid state was investigated on as-cast and four-pass CCDF-formed AZ80......