The homogenization heat treatment of aluminum-manganese ingot

Authors: Firth, M.; Williams, W.M.

Source: Canadian Metallurgical Quarterly, Number 4, October-December 1969 , pp. 331-335(5)

Publisher: Maney Publishing

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Abstract:

The distribution of alloying elements in commercial grade Al-Mn ingot was studied using electron probe microanalysis, and the effect of homogenization heat treatment was followed for periods up to 5 days.

In the as-cast material, nearly all the Mn was present in solid solution; heat treatment at 625°C caused the precipitation of most of the Mn within 2 hours, suggesting that industrial heat treatment time could be reduced to similar low values. Recrystallization experiments confirmed that short homogenization times produced the desired objectives of a fine grain size and a reduction in the recrystallization temperature of the final hot- and cold-rolled material.

Résumé

Les auteurs ont étudié la distribution des constituants d'un lingot d'aluminum-manganèse de pureté commerciale au moyen d'une microsonde et en examinant les effets de traitements d'homogénéisation pour des temps atteignant 5 jours.

Dans le lingot brut de coulée, la presque totalité du manganèse est sous forme de solution solide. Cependant en moins de 2 heures a 625°C, il est presque entièrement precipite. Ce fait suggère une réduction du temps des traitements thermiques industriels. Des expériences de recristallisation ont confirmé le fait que de courts maintiens d'homogénéisation permettent d'atteindre les buts fixés: grains fins et diminution de la température de recristallisation des produits laminés à chaud et à froid.

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/000844369795149146

Publication date: 1969-10-01

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