摘要
TC21钛合金是新型的高强韧损伤容限型钛合金,其模锻件为网篮组织,锻后热处理工艺采用双重退火工艺。本研究采用金相法、SEM等方法系统研究了TC21钛合金模锻件的锻后热处理工艺和显微组织演变规律。试验分析了TC21钛合金模锻件锻后第1次退火加热温度、第2次退火加热温度和保温时间等工艺参数条件下的初生α相数量、形状以及网篮组织形貌特征的变化规律,为TC21钛合金模锻件获得高强、高韧和损伤容限优良综合性能奠定基础。
TC21 titanium alloy is a new type of titanium alloy of high strength, high toughness and damage tolerance. TC21 titanium alloy forgings with lamellar microstructure will be the right microstructure after dual annealing heat treatment to obtain high fracture toughness and low fatigue crack propagation rate, which are needed by design of excellent damage tolerance and long duration. By means of photographic and SEM techniques, the relationship between heat treatment parameters and microstructures evolvement of TC21 titanium alloy forgings has been studied. The effect-of, first annealing temperature and second annealing temperature and time on the amount and shape of lameUar structure has also been analyzed, which could lay a solid technological foundation for TC21 titanium alloy forgings to achieve high strength, high toughness and damage tolerance properties.
出处
《钛工业进展》
CAS
2006年第6期24-27,共4页
Titanium Industry Progress
关键词
TC21钛合金
网篮组织
双重退火:损伤容限
TC21 titanium alloy
lamellar microstructure
dual annealing heat treatment
damage tolerance
