(北京航空材料研究院,北京 100095)
摘 要: Ti-1023钛合金通过适当的变形,可达到组织性能的良好匹配。设计了3种改锻工艺方案,试样经过改锻后测试其宏观/微观组织、拉伸性能和断裂韧性。结果表明:第1、2种工艺方案由于原始β晶粒尺寸偏大、晶界破碎不充分塑性很低;综合前2种方案的第3种方案获得的钛合金的显微组织和力学性能都比较理想,而且该工艺重复性较好,可作为实际生产工艺。
关键字: Ti-1023钛合金;锻造;力学性能
(Beijing Institute of Aeronautic Materials, Beijing 100095, China)
Abstract:The excellent combined properties could be achieved by means of proper deforming process for Ti-1023 titanium alloy. Three deforming schemes were designed, named schemes 1, 2 and 3, respectively. The micro/macro-structures were checked and mechanical properties were tested. It is shown that Ti-1023 titanium alloy deformed by schemes 1 and 2 have poor ductility for large original β grain sizes and insufficient breakage of grain boundary. Ti-1023 titanium alloy deformed by schemes 3 shows better micro/macro-structures and mechanical properties, and the process is of good repeatability. So, the process using case 3 can act as factory process.
Key words: Ti-1023 titanium alloy; forging; mechanical properties