β钛合金斜轧穿孔试验及热处理

Rotary Piercing Experiment and Heat Treatment of β Titanium Alloy

利用两辊斜轧穿孔机进行了Ti26高强钛合金管坯的斜轧穿孔试验,分析了穿孔过程中应变的分布规律及工艺参数,并研究了氩气保护、感应退火、真空3种不同热处理方式对管坯组织及性能的影响。结果表明:选择合理的穿孔工艺参数,可以获得优质的β钛合金管坯,感应退火处理是穿孔管坯一种有效的均匀化热处理工艺。

A rotary piercing technique is one of the effective methods to fabricate seamless tube of less-deformable alloy. The research on the technique using the rotary piercing method to produce Ti26 high-strength titanium tube was performed. The distribution of strain and parameters during rotary piercing was analyzed. Microstructure, properties and fracture surface of the tube were studied after annealing treatment in argon, induction and vacuum. The results show that the high-quality tube of β titanium alloy can be obtained by the rotary piercing technique, and the induction annealing technique is an efficient heat treatment for the tube.