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Semi-solid processing of hypereutectic A390 alloys using novel rheoforming process M. TEBIB1, J. B. MORIN1, F. AJERSCH2, X. GRANT CHEN1 1. Université du Québec à Chicoutimi, Chicoutimi, QC, G7H... alloys using a novel rheoforming process was investigated. A combination of the swirl enthalpy equilibration device (SEED) process, isothermal holding using insulation and addition of solid alloy during......
Effects of rheoforming on microstructures and mechanical properties of 7075 wrought aluminum alloy GUO Hong-min(郭洪民)1, YANG Xiang-jie(杨湘杰)1, WANG Jia-xuan(王家宣)2,HU Bin(胡 斌)1, ZHU Guang-lei(朱光磊)1... of the rheoforming with 7075 alloy to improve the competitiveness of this emerging technology in the manufacture of wrought aluminum alloy. High quality semi-solid slurry was produced, in which primary α(Al......
words: 6201 aluminum alloy; semisolid; rheoforming extrusion; extending; tube; temperature 1 Introduction SPENCER et al [1] found rheological behaviors of semisolid metal and established the fundamental theories of rheoforming process. Subsequently, FLEMINGS [2] and KIRKWOOD [3] proposed semisolid metal processing. These findings provide a good guidance for the development of rheoforming process......
electromagnetic stirring; rheoforming 半固态触变成形技术存在工艺流程长, 制坯成本高(坯料成本占零件成本约40%), 重熔能耗高, 坯料表面氧化严重, 加热过程坯料流失严重(流失高达10%), 生产废料无法在生产现场回收等诸多问题[1]. 从20世纪90年代以来, 流变成形技术逐渐成为国内外半固态成形技术的重点发展方向. 目前, 在主要流变成形技...靖林, 李双寿, 等. 半固态合金流变成形技术的研究现状与发展[J]. 铸造, 2004, 53(12): 963-967. FENG Peng-fa, TANG Jing-lin, LI Shuang-shou, et al. Progress and prospect of research and application of semi-solid alloy rheoforming......
Trans. Nonferrous Met. Soc. China 24(2014) 1109-1116 Forced convection rheoforming process for preparation of 7075 aluminum alloy semisolid slurry and its numerical simulation Bing ZHOU1, Yong-lin... convection rheoforming (FCR) machine for the preparation of light alloy semisolid slurry was introduced. The microstructure characteristics of 7075 aluminium alloy semisolid slurry at different stirring......
分布要比流变成形的均匀. 图3 流变成形中的晶间偏析 Fig. 3 Intercrystalline segregation in rheoforming 图4 A356铝合金流变成形晶间偏析的三维空间形貌 Fig. 4 Three dimensional morphologies of intercrystalline segregation in rheoforming A356 alloy 第二种表现形式,晶间偏析的程度随着半固态浆料中固相分数的增加而增加.郭洪民等采用流变成形二步热力学计算方法计算了AZ91,AZ61和AM60B镁合金半固态浆料固相分数(对应于成形温度TP)对β-Mg17Al12相对含量的影响(相对于共晶反应L→α-Mg+β-Mg17Al12+Al11Mn4发生时半固态浆料中的剩余液相)[32].结果表明:随着半固......
fabricated by the VSC-DCT method is improved significantly. Key words: damper cooling tube method; vacuum suction casting; semisolid slurry; rheoforming; microstructure 半固态金属(Semisolid metal, SSM)浆料具有独特的球形晶粒结...合金传统的半固态成形工艺主要分为两种:一是触变成形(Thixoforming)工艺[9-12],即利用预先制备好的非枝晶组织半固态铸坯二次加热至两相区后再模锻成形的方法；二是流变成形(Rheoforming)[13-17]工艺,即先制备半固态浆料,然后将半固态浆料输送到模具或压铸机内直接浇铸或压铸成形,该工艺的最大问题是镁合金半固态金属浆液的保存和输送难度较大,使其应用受到很大限制[18]. 本文......
: The microstructure characteristics and mechanical properties of 2024 wrought aluminum alloy produced by a new rheoforming technique under as-cast and optimized heat treatment conditions were investigated. The present rheoforming combined the independently developed rheocasting process, named as LSPSF (low superheat pouring with a shear field) process, and the existing squeeze casting process......
-solid slurry for rheoforming was proposed. The semi-solid slurry preparation of A356 aluminum alloy was carried out, applying this method of AO. The results show that the limited angular oscillation can......
与传统的成形技术衔接简便. 关键词:A356铝合金；流变成形；浆料制备；工件成形；浆料输送 中图分类号:TG 146.2; TG 115.9 文献标识码:A Rheoforming processing of Al alloys with slurry preparation system and component... and the rheocasting mould, all of which are independently developed, a new rheoforming processing of Al alloy with slurry preparation systems and component shaping systems apart was exploited. The results show......
