Microstructure of nearby liquidus semicontinuous casting aluminum alloy A356

被引：0

作者：

Wang, P ^{[1
]}

Lu, GM ^{[1
]}

Cui, JZ ^{[1
]}

机构：

[1] Northeastern Univ, Minist Educ, Key Lab Electromagnet Proc Mat, Shenyang 110004, Peoples R China

来源：

ACTA METALLURGICA SINICA | 2002年 / 38卷 / 04期

关键词：

A356 aluminum alloy; nearby liquidus casting; semi-solid slurry; microstructure;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The microstructure of aluminum alloy A356 with fine equiaxed nondendritic grains was obtained by means of nearby liquidus semi-continuous casting method, which is needed by semisolid metal process. The influences of casting temperature, heat preservation time and cooling rate on nearby liquidus casting microstructure are investigated. The results show that in the nearby of liquidus, the grains size becomes tiny with reducing of casting temperature, the least average equal-area-circle grain diameter is 42.6 mum, and the original solid fraction may reach 98.4%. Prolonging the heat preservation time makes grain size coarse at the same temperature, and increasing the cooling rate makes grain size fine. The microstructure of ingot cast in the Fe-mould is finer than that in the graphite-mould, The grains size of ingot middle is coarser, more even and equiaxed than that at the edge of ingot in the same ingot cast.

引用

页码：389 / 392

页数：4

共 9 条

[1] RESPONSE OF SPRAY-DEPOSITED, STIRRED-CAST AND CONVENTIONAL CAST PB-SN ALLOYS TO DEFORMATION IN THE SEMISOLID STATE [J].

CHEN, CP ;

TSAO, CYA .

JOURNAL OF MATERIALS SCIENCE, 1995, 30 (16) :4019-4026

[2]

Chiarmetta, 1996, P 4 INT C SEM PROC A, P204

[3]

Cui Jianzhong, 2000, J HARBIN I TECHNOL, V32, P110

[4] BEHAVIOR OF METAL-ALLOYS IN THE SEMISOLID STATE [J].

FLEMINGS, MC .

METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY, 1991, 22 (03) :269-293

[5]

Kenney M. P., 1998, METALS HDB, V15, P327

[6]

KIUCHI M, 1990, J MAT SHAPING TECH, V8, P39

[7]

LU GM, 2000, C SEM SOL PROC ALL C, P373

[8]

Lu Guimin, 2001, CHIN J NONFERROUS ME, V11, P211

[9] MODIFICATION OF SOLIDIFICATION STRUCTURES BY PULSE ELECTRIC DISCHARGING [J].

NAKADA, M ;

SHIOHARA, Y ;

FLEMINGS, MC .

ISIJ INTERNATIONAL, 1990, 30 (01) :27-33

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