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Article ID: 1003-6326(2005)02-0389-06 Simulation of cooling channel rheocasting process of A356 aluminum alloy using three-phase volume averaging model T. Wang1, 3, B. Pustal1, M. Abondano1, T... on the grain density, grain size and solid fraction is analyzed in detail. Key words: A356 alloy; modeling; cooling channel; three-phase; semi-solid CLC number: TG249.9 Document code: A
Trans. Nonferrous Met. Soc. China 22(2012) 1307-1312 Preparation of semi-solid A356 Al-alloy slurry by introducing grain process CHEN Zheng-zhou Huili Machinery and Electric Co. Ltd., Cixi 315333... on the microstructures of the semi-solid A356 Al-alloy slurries were investigated, and the formation mechanism and morphology controlling of the spherical primary α(Al) grains were discussed. The results......
was modeled as a multi-layered porous medium consisting of fixed columnar dendrites and mobile equiaxed/fragmented grains. The alloy chosen for the study was aluminum alloy A356, for which adequate... and macrosegregation were also studied. Key words: simulation; cooling slope; slurry; solidification; A356 Al alloy; semi-solid 1 Introduction Semisolid metal processing uses solid–liquid slurries......
of the piece and toughness and the second alloy (A356) of low machining costs in the core of the piece can be produced via this melt process. The effect of the second alloy superheat at temperatures...; A356 alloy; functionally graded material; cast-decant-cast process 1 Introduction Many engineering components require contradictory material properties, such as lightweight and wear resistance, wear......
,拉伸测试后取其平均值.最后采用Neuphoto光学显微镜,扫描电镜(SEM)和能谱分析仪(EDS)对样品进行显微组织分析. 图1 旋转永磁体搅拌工艺制备半固态A356铝合金浆料及流变压铸示意图 Fig. 1 Schematic diagram of semisolid A356 aluminum alloy slurry prepared by rotating... properties and fracture behavior of partial squeeze added slow shot die-cast A356 aluminum alloy[J]. Materials and Design, 2010, 31(9): 4237-4243. [2] CHEN Zheng-zhou, MAO Wei-min, WU Zong-chuang......
Influence of additive element on surface oxide film of A356 alloy OUYANG Zhi-ying(欧阳志英), LIANG Hong-yu(梁红玉), MAO Xie-min(毛协民), HONG Mei(红 梅) School of Material Science and Engineering... film of A356 aluminum alloy melt were investigated. The hydrogen content of the melt was measured by reduce pressure test. The phases in the surface oxide film were analyzed by X-ray diffractometry......
45.7 μm, 形状因子降至0.67. 图2 不同磁场频率双向连续电磁搅拌下半固态A356铝合金的初生相形貌 Fig. 2 Morphologies of primary α phase in semisolid A356 aluminum alloy at different magnetic field frequency of two-way continuous... circle diameter and average shape factor of primary α phase in semisolid A356 aluminum alloy at different magnetic field frequencies of two-way continuous electromagnetic stirring 2.2 电磁搅拌方式对合金凝固组织......
整度反而降低.在椭圆长短轴比为1.8:1,旋扭强度为13.5 (°)/cm,凝熔频率为40 μm-1的条件下可制得晶粒直径细小,形状圆整的半固态浆料. 关键词:A356铝合金；椭圆旋钮管；反复凝熔法；半固态；微观组织 中图分类号:TG146.4 文献标志码:A Preparation of semi-solid A356 Al alloy..., Ningbo 315100, China; 2. Beijing General Research Institute for Nonferrous Metals, Beijing 100088, China) Abstract: The semi-solid slurry of A356 aluminum alloy was prepared by the repeated heating......
A356铝合金半固态成形前后组织和性能的实验分析邵玉鹏1,杨弋涛1,尹湘林1,张恒华1,邵光杰1(1.上海市上海大学材料科学与工程学院)摘 要:半固态触变成形过程对保证成形后零件良好的组织和性能起着至关重要的作用,通过观测半固态成形前后组织之间的联系可知,压铸过程中的成形状况和压铸前的组织特征均影响压铸后零件的组织和性能,半固态加热和压铸成形这2个阶段存在一定的联系.这些对于半固态成形的质量控制具有一定的指导意义.关键词:A356铝合金； 半固态； 触变成形； 组织特征； 力学性能......
230 mm,内径190 mm,结晶器材料为紫铜,半径30 mm,高100 mm.模拟参数定义:磁导率(定子铁芯3000,空气和半固态铝合金浆料1),电阻率(通电线圈1.7×10-8 W·m,半固态铝合金2.1×10-7 W·m).实验材料A356铝合金实际成分在Magix(PW2424)X下得出如表2所示. 表2 实验用A356合金成分 Table 2 A356 alloy...流强度为4 A时,初生相形貌达到最佳. 图6 不同电流强度下半固态A356铝合金初生相形貌 Fig. 6 Morphologies of primary phase in semi-solid A356 alloy under different current intensity 图7 不同电磁频率下半固态A356铝合金初生相形貌 Fig. 7 ......
