발간논문

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Vol.42, No.6, 521 ~ 530, 2004
Title
Hot Rolling Properties of Homogenized AZ31-xCa(x=0~2.0 wt. %) Gravity Cast
임창동 Chang Dong Yim , 유봉선 Bong Sun You , 김수현 Su Hyeon Kim , 이진수 Jin Su Lee , 김완철 Wan Chul Kim
Abstract
The effects of homogenization on hot rolling properties of gravity cast AZ31-xCa (x=0-2.0 wt.%) alloys were evaluated by examination of surfaces and microstructures of sheets. The side cracking during hot rolling was decreased by homogenization through the elimination of local inhomogeneity and solution of brittle precipitate into matrix. The coarse grains in raw materials were changed to fine grains with the average particle size of 5-10 μm by repeated hot rolling through the dynamic recrystallization. A deformation twinning was more favorably formed in the hot-rolled sheets after homogenization. It is considered that the grains grow and the precipitates are solved into the matrix during homogenization heat treatment, which results in the increased possibility of formation of deformation twinning during hot rolling. (Received March 29, 2004)
Key Words
Magnesium alloy, Hot rolling Sheet, Homogenization
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