热处理对Ti3Al基合金板材微观组织和力学性能的影响

来源期刊:中国有色金属学报2013年第z1期

论文作者:郭佳林 魏寿庸 杨 奇 王 新 曹京霞

文章页码:485 - 490

关键词:Ti3Al基合金板材;微观组织;力学性能;超塑性

Key words:Ti3Al based alloy sheet; microstructures; mechanical properties; superplasticity

摘    要:研究热处理工艺对Ti3Al基合金热轧板材(1.9 mm×900 mm×3 000 mm)组织和性能的影响。结果表明:当板材在900~1 050 ℃退火时,退火温度对微观组织和室温塑性(δ5)影响较为明显,对室温强度的影响则较小;时效时间对板材的室温和高温性能影响不明显,同时固溶时效后的板材具有较好的超塑性,在条件为温度1 020 ℃、变形速率2×10-4 s-1时,其伸长率达到617%。

Abstract: The effect of heat treatment on microstructures and mechanical properties of Ti3Al based hot-rolling alloy sheet (1.9 mm×900 mm×3 000 mm) was studied. The results show that microstructures and plasticity at the room temperature will change obviously while annealing temperature is between 900 and 1 050 ℃. No significant differences of the room and elevated temperature properties are observed after long time aging treatment, but the treated sheet has excellent superplasticity. The elongation rate reaches 617% under the condition of 1 200 ℃ temperature and 2×10-4 s-1 deformation rate.

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