Fracture of thin cast slabs of Al-Sn alloys during cold rolling

被引:5
作者
Schouwenaars, R. [1 ]
Ramirez, E. I. [1 ]
Romero, J. [1 ]
Jacobo, V. H. [1 ]
Ortiz, A. [1 ]
机构
[1] Univ Nacl Autonoma Mexico, Fac Ingn, Dept Mat & Manufactura, Mexico City 04510, DF, Mexico
关键词
Casting defects; Cold working; Heat treatment; Microstructures; beta-AlFeSi; ALUMINUM-ALLOY; EVOLUTION; GROWTH;
D O I
10.1016/j.engfailanal.2012.05.020
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Al 19%Sn 1%Cu (SAE 783) and Al 12%Sn 2.5%Si (SAE 788) alloys are ductile triboalloys which are produced by thin-slab casting followed by cold rolling. For SAE783, rolling defects are rare and generally associated to gross defects in the cast microstructure. SAE 788 forms the metastable beta-AlFeSi phase, creating a brittle network within the microstructure. Heat treatment of the as-cast slabs allows reducing the effect of this phase by a reduction in its volume fraction and a change of composition, but this is a slow process. Instead, modification of the casting procedures, according to well-established rules for the production of sound aluminium castings, together with the use of base material of higher purity were shown to be equally efficient in the prevention of rolling defects. The heat treatment could then be omitted while rolling defects were eliminated. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:175 / 181
页数:7
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