(宝鸡钛业股份有限公司，宝鸡 721014)
摘 要: 研究Ti80合金挤压管材在800~1 020 ℃范围内不同温度退火处理对挤压管材组织与性能的影响。研究发现：随着退火温度从800 ℃升高到1 020 ℃，Rm从910 MPa提高到935 MPa，A从15%升至17%再降至12%，抗拉强度变化不大，但塑性变化较明显。在800~900 ℃退火可消除管材内应力并发生部分再结晶。温度升高到950 ℃时，再结晶进行得较充分，组织得到细化和球化，管材的室温力学性能良好。退火温度继续升至1 020 ℃时，获得魏氏组织，导致塑性降低。
关键字: Ti80钛合金管材；组织；性能
properties of Ti80 alloy extrusion tube
（Baoji Titanium Industry Co., Ltd., Baoji 721014, China）
Abstract:The effect of annealing process on microstructure and properties of Ti80 alloy extruded tube at 800−1 020 ℃ was studied. The results show that the Rm of Ti80 tube increases from 910 MPa to 935 MPa when the annealing temperature rises from 800 ℃ to 1 020 ℃, meanwhile the elongation increases from 15% to 17% and then goes down to 12%. Tensile strengh is nealy the same, but the ductility change is obvious. The annealing between 800 ℃ and 900 ℃ can remove the internal stress and creat the partial recrystallization. When the temperature goes up to 950 ℃, the recrystalization is sufficient, the microstructure is refined and spheroidized, and the mechanical properties of the tube are improved. When the annealing temperature continously goes up to 1 020 ℃, the microstructure changes to Widmanstaten structure and the ductility decreases.
Key words: Ti80 alloy tube; microstructure; properties
