Anneal-hardening Behaviours in α-Brass Sheets in Relation to Rolling Method
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概要
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The effect of rolling method on the hardness due to annealing at 150°and 200℃ was examined with 70/30 brass of different grain sizes by applying three types of cold-rolling, straight-, reverse- and cross-rolling. The hardness change before recrystallization was, in all cases, composed of two hardening stages, between which an intermediate stage of softening was almost constantly inserted. The amount of hardening, in general, seemed to be the largest in the cross-rolled specimen, Upon heat-treatment at 150℃ more pronounced hardening was observed in the second stage of hardening than in the first stage, and the rate of change seemed to be slightly delayed in the fine-grained and straight-rolled specimen. In the case of the heat-treatment at 200℃, the first hardening was more predominant than the second one, and the beginning of recrystallization after the second hardening considerably delayed in the specimen of coarser grain and lower reduction, though the intermediate softening was scarcely influenced by them . The results obtained were discussed by dividing the causes of anneal-hardening into two factors, one of which might contribute to hardening (Suzuki-effect) and the other to softening (recovery).
- 東北大学の論文
- 1965-00-00
著者
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