(西北有色金属研究院，西安 710016)
摘 要: 采用直径为280 mm的 Ti80 R态棒材为坯料，通过讨论不同的穿孔温度、总压缩变形率和顶头等参数，分析穿孔管坯表面质量、尺寸以及不同热处理状态下的组织和性能，研究Ti80大口径无缝管材斜轧穿孔的可行性。结果表明：Ti80材料在穿孔温度为1 020~1 150 °C、斜轧穿孔压下变形率为12%~17%的情况下，采用合理的穿孔参数可以制备大规格管材。将Ti80管材在相变点之上进行穿孔，并通过(960 °C, 30 min, WC)+(600 °C, 4 h, AC)热处理，获得较为理想的综合力学性能。
关键字: Ti80合金；斜轧穿孔；微观组织；热处理
（Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China）
Abstract:The feasibility of roll piercing for fabricating large-diameter tube of Ti80 alloy was introduced with bar diameter of 280 mm. Perforation parameters such as temperature, total compression deformation rate and appearance quality were considered. Size, microstructure and properties of different heat treatment conditions were investigated. The results show that the way that the large-diameter tube of Ti80 alloy are fabricated by roll piercing is feasible within the temperature range of 1 020-1 150 °C, the deformation rate of punch presses should be 12%~17%. Ti80 alloy tube under the heat treatment regime of (960 °C, 30 min, WC)+(600 °C, 4 h, AC) can obtain good comprehensive mechanical properties.
Key words: Ti80 alloy; roll piercing; microstructure; heat treatment
