Melt Conditioned Direct Chill Casting (MC-DC) of Wrought Al-alloys

被引：16

作者：

Haghayeghi, R. ^{[1
]}

Liu, Y. ^{[1
]}

Fan, Z. ^{[1
]}

机构：

[1] Brunel Univ, BCAST, Uxbridge UB8 3PH, Middx, England

来源：

Semi-Solid Processing of Alloys and Composites X | 2008年 / 141-143卷

关键词：

Melt conditioning; direct chill casting; solidification; aluminium alloy;

D O I：

10.4028/www.scientific.net/SSP.141-143.403

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Melt Conditioned Direct Chill (MC-DC) casting is a new development for producing high-quality billets and slabs. In the MC-DC process, liquid metal is continuously fed into a MCAST (melt conditioning by advanced shear technology) machine, where the liquid metal is subjected to high shear rate and high degree of turbulence provided by a twin screw mechanism at temperatures either above or below the alloy liquidus, and the conditioned liquid metal is then fed continuously into a Direct Chill (DC) caster to produce billets or slabs. The MC-DC process is applicable to both Al- and Mg-alloys. In this paper we present our experimental investigations of the effects of processing parameters on the microstructural and compositional uniformity of 5xxx and 7xxx series Al-alloys. It has been confirmed by our experiments that the MC-DC process can produce billets and slabs with fine and uniform microstructure; uniform chemical compositions and much reduced cast defects, such as porosity and cracks.

引用

页码：403 / 408

页数：6

共 7 条

[1]

*AL ASS, 1990, STAND TEST PROC AL A

[2] Solidification behaviour of AZ91D alloy under intensive forced convection in the RDC process [J].

Fan, Z ;

Liu, G .

ACTA MATERIALIA, 2005, 53 (16) :4345-4357

[3]

FAN Z, 1999, Patent No. 0121343

[4]

GABATHULER JP, 1992, 2 INT C SEM PROC ALL, P33

[5] Modelling of inoculation of metallic melts: Application to grain refinement of aluminium by Al-Ti-B [J].

Greer, AL ;

Bunn, AM ;

Tronche, A ;

Evans, PV ;

Bristow, DJ .

ACTA MATERIALIA, 2000, 48 (11) :2823-2835

[6]

WITULSKI T, 1996, 4 INT C SEM SOL PROC, P242

[7] Direct chill rheocasting (DCRC) of AZ31 Mg alloy [J].

Zhang, S. M. ;

Fan, Z. ;

Zhen, Z. .

MATERIALS SCIENCE AND TECHNOLOGY, 2006, 22 (12) :1489-1498

← 1 →