Influence of a wiper on transport phenomena in direct chill casting of aluminium alloy 7050

被引：12

作者：

Fezi, Kyle ^{[1
]}

Krane, Matthew John M. ^{[1
]}

机构：

[1] Purdue Univ, Sch Mat Engn, Purdue Ctr Met Casting Res, W Lafayette, IN 47907 USA

来源：

INTERNATIONAL JOURNAL OF CAST METALS RESEARCH | 2017年 / 30卷 / 04期

关键词：

Aluminium direct chill casting; macrosegregation; wiper; FREE-FLOATING DENDRITES; AL-CU; THERMOSOLUTAL CONVECTION; MACRO SEGREGATION; MACROSEGREGATION; SOLIDIFICATION; FLOW; TEMPERATURE; SPEED;

D O I：

10.1080/13640461.2017.1286552

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A fully transient model of the direct chill casting process is used to examine the influence of implementing a wiper to divert the free falling water from the ingot surface on transport phenomena and segregation profiles for aluminium alloy 7050. The ingot diameter and casting velocity are varied to determine the proper wiper placement as determined by the predicted composition, temperature, and fraction solid fields. The segregation level was evaluated by comparing steady state radial composition profiles. The wiper alters the dominant radial heat transfer mechanism, causing the surface of the ingot to heat up below the wiper. Placing the wiper too close to the mould causes the surface temperature to increase above the solidus, making the ingot susceptible to bleed outs. The optimal wiper location was found to be near the bottom of the sump for all process conditions examined.

引用

页码：191 / 200

页数：10

共 31 条

[1]

[Anonymous], 3 INT C ADV SOL PROC

[2]

[Anonymous], 3 INT C ADV SOL PROC

[3]

[Anonymous], 1997, THESIS

[4]

[Anonymous], B247 ASTM

[5]

[Anonymous], MAT SCI TECHNOL

[6]

[Anonymous], 1980, Numerical heat transfer and fluid flow

[7]

Dantzig J. A., 2009, SOLIDIFICATION

[8] Influence of a wiper on residual stresses in AA7050 rolling plate ingots [J].

Drezet, J. -M. ;

Pirling, Th. .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2014, 214 (07) :1372-1378

[9] The effect of ramping casting speed and casting temperature on temperature distribution and melt flow patterns in the sump of a DC cast billet [J].

Du, Q ;

Eskin, DG ;

Katgerman, L .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2005, 413 (413-414) :144-150

[10]

Eskin: D.G., 2014, TMS Annu. Meet. Exhib. Light Met, P855

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