采用正交试验方法,对交叉轧制AZ31B镁合金进行数控热渐进成型的工艺试验,考察了AZ31B镁合金板在不同温度和成型工艺参数下的热渐进变形规律.结果表明:最佳成型工艺条件为在250℃时采用0.1 mm的进给量和1 800 mm·min-1的进给速度,此时板材成型极限角可达61°;在热渐进成型工艺条件下板材的厚度变化仍遵循余弦法则.
Hot incremental forming technological test of cross-rolled AZ31B magnesium alloy was carried out by using orthogonal experiment method. The hot incremental deformation law of the alloy was investigated at different temperatures and forming parameters. The results show that the optimum conditions were the amount of feed was 0. 1 mm, feed rate was 1 800 mm · min-1 at 250 ℃, the forming limit angle could reach to 61°. It was demonstrated that the thickness distribution along the hot formed part still accorded with the cosine law.
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