(1. 宝鸡钛业股份有限公司，宝鸡 721014；
2. 北京航空材料研究院，北京 100095)
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%。
关键词: Ti3Al基合金板材；微观组织；力学性能；超塑性
（1. Baoji Titanium Industry Co., Ltd., Baoji 721014, China;
2. Beijing Institute of Aeronautical Materials, Beijing 100095, China）
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.
Key words: Ti3Al based alloy sheet; microstructures; mechanical properties; superplasticity
