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对热轧开坯后的铜锰合金板材在不同温度进行退火,分别采用淬火和炉冷方式进行冷却,研究退火温度和冷却方式对该合金组织和性能的影响。结果表明:合金热轧组织为回复状态,存在大量絮状组织。随着淬火温度的增加,合金的再结晶率逐渐增加,絮状组织逐渐减少。不同温度炉冷后,该合金组织中存在大量沿轧制方向分布的絮状组织,随温度升高,絮状组织逐渐粗化。合金热轧、850℃退火后为γ单相组织;650℃退火后,组织中出现α-Mn相。铜锰合金随淬火温度升高,强度逐渐降低,伸长率显著升高;炉冷处理后,合金强度高,伸长率较低。采用700~850℃淬火处理时,锰铜合金具有优异的塑形成型性能。
The hot rolled billets were annealed at different temperatures and then cooled by quenching and furnace cooling respectively. The effects of annealing temperature and cooling mode on microstructure and properties of the alloy were studied. The results show that the hot rolled microstructure of the alloy is in a state of recovery with a large amount of flocculent structure. With the increase of quenching temperature, the recrystallization rate of the alloy gradually increases and the flocculent structure decreases gradually. After cooling in different temperature furnaces, there existed a large amount of flocculent tissue distributed along the rolling direction in the alloy. With the temperature increasing, flocculent tissues gradually roughened. The alloy was hot-rolled and annealed at 850 ℃. The alloy was γ-phase. After annealing at 650 ℃, α-Mn phase appeared in the microstructure. With the increase of quenching temperature, the strength of copper-manganese alloy gradually decreased and the elongation increased significantly. After the furnace cooling, the strength of the alloy was high and the elongation was low. With 700 ~ 850 ℃ quenching, manganese-copper alloy has excellent forming properties.