Effects of Beta Phase and Thickness of Sheet on the Grain Growth of 65/35 Brass Sheets

摘要

Studying on the effect of beta phase on the growth of recrystallized grain in 65/35 brass sheets, following results were obtaind.b When the 65/35 brass sheet with the residual beta was annealed, the grain growth rate of alpha phase was larger in comparison with the sample of the only alpha phase. But it seemed that the grain growth of alpha phase was suppressed to laminated beta. The residual beta particle was dissolved in alpha phase by annealing for a long time. As a result the mixed grains were formed around the beta phase. The fine grains within mixed grains were absorbed into the coarse grains. And it is observable that the recrystallized grain size was larger on the sample with the beta after the beta phase had dissolved into the alpha phase. Moreover the grain growth was made more easily on the thin sheet.