Isao Gokyu1, Keijiro Suzuki1 and Teiji Gotô2
1Department of Metallurgy, Faculty of Engineering, University of Tokyo, Tokyo
Deep drawing of 70/30 and 65/35 brass has been studied by many researchers. But most of these studies have dealt with the ear formation in drawn cups and no attempts have been made to analyse the drawability in terms of the preferred orientation. In brass sheets it is well known that their low-temperature annealing texture is oriented in (225)[73
In the present study the contribution of the crystallographic texture of α-brass toward the deep drawability was investigated, with the results summarized as follows:
(1) There is no marked difference in plastic behavior between 70/30 and 65/35 brasses in regard to the drawability.
(2) Annealing at low temperature (400°C) produces only a (225)[73 ] texture in the sheets cold rolled above 90%, while slight preferrence in (110)[ 12] developes in the sheets cold rolled below 90%.
(3) Annealing at high temperature (700°C) tends to produce a (110)[ 12] texture, but cold-rolling more than 95% before annealing reduces the component remarkably.
(4) Grain coarsening of α-brass is accompanied by the development of (110)[ 12] texture.
(5) (110)[ 12] orientation improves the drawability of α-brass.
(6) (225)[73 ] component makes little contribution to the drawability.
(7) Some correlations were recognized between the drawability and the grain size in α-brass, coarse grained sheets being favorable.
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