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阻尼冷却管法制备A356铝合金半固态浆料的研究 金俊泽1,杨浩强2,李廷举1,谢水生2,张小立1 (1.大连理工大学,三束材料改性国家重点实验室,辽宁,大连,116024;2.北京有色金属研究总院,北京,100088) 摘要:介绍了阻尼冷却管法制备半固态浆料工艺的实验装置及其原理,采用A356铝合金进行了不同浇注温度的系列实验.铸件微观结构中晶粒尺寸和形状因子测算分析结果表明:由于阻尼冷凝管的冷却和搅拌作用,熔体浇注温度越低,在两相温度区间内生成的游离晶核就越多,浇铸的铸件晶粒尺寸和形状因子数值就越小,晶粒球化程度越高.阻尼冷凝管法制备的合金浆料或铸坯能够应用于下一步半固态成形加工. ......
microstructure in semisolid Al-Cu alloy LIU Zheng1, ZHOU Xiang-yu2 (1. School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China; 2. School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China) Abstract: The semisolid ZL203 alloy slurry was prepared by a self-made electromagnetic stirring unit......
, Bangalore-560012, India摘 要:Present trend of semi-solid processing is directed towards rheocasting route which allows manufacturing of near-net-shape cast......
, i.e., semisolid processing plus Bridgman solidification. Different morphologies, distributions, and volume fractions of the crystalline phases can be achieved by tailoring the withdrawal velocity......
Rheo-diecasting of AZ91D magnesium alloyXU Juna,LIU Guojuna,ZHANG Shaominga,SHI Likaia,and FAN Zhongyunb a General Research Institute for Nonferrous Metals,Beijing100088,China b Brunel Centre for Advanced Solidification Technology,Brunel University,Uxbridge,London,UB8 3PH,UK摘 要:A rheo-diecasting process(RDC) was investigated for semisolid processing......
. Theoretical analysis was given concerning the thermal conductivity and heat capacity of A356 between conventional and semisolid casting microstructures. The experimental results show that the optimized......
with ultrasonic treatment (UST) in Al-Si alloys, a part of semisolid overflows and climbs along the probe. The interesting phenomenon and its influence on the solidification microstructure were investigated in order to better study the mechanism of UST. It is considered that the overflowing phenomenon occurs due to the changes of vibration and flow in the remaining semisolid. Because the overflowed portion......
部位,壳体部位各结果参数变化较小,且分布均匀. 关键词:半固态;AZ91D;触变注射;数值模拟;参数优化 中图分类号:TG 146.2 文献标识码:A Numerical simulation and parameters optimization of thixomolded process for semisolid AZ91D... and properties of products during molding process of thixomolded semisolid slurry, based on the initial and ultimate viscosities and the Carreau viscosity model, a series of thixomolded processes for semisolid......
Development of Deformation-Semisolid-Casting (D-SSC) Process and Applications to Some Aluminum AlloysTatsuo Sato摘 要:<正>Recent advances in the semisolid casting technologies are introduced for aluminum alloys.The advantages of the rheocast and thixocast methods to fabricate alloys with refined spheroidizedα-Al particles are described......
research, semisolid billet of 7005 aluminum alloy was fabricated by using recrystallization and partial remelting(RAP), then thixoformed at different isothermal temperatures, preheating temperatures... aluminum alloy consists of a uniform and spheroidal microstructure suitable for thixoforming.Preheating temperature of the die affected signi?cantly the ?lling status of semisolid billet of 7005......