摘要
研究了利用超声波检验不合格的毛坯，经过中间β处理，生产出组织和性能符合国军标要求的合格叶片模锻件的方法。结果表明，高倍组织不均匀的毛坯，经β处理、水冷获得α组织，使叶片的缘板或榫头和叶身的锻造变形量控制大于５０％，锻造温度控制为（Ｔβ－５０）℃，第一次退火温度由（Ｔβ－５０）℃提高到（Ｔβ－４０）℃，保温时间取３ｈ，最终获得的叶片模锻件的高、低倍组织可达到国军标评级图１～２级。
A special technique was proposed for producing TC11 alloy blade forgings meeting the GJB requirements from the stocks with non uniform microstructures revealed by ultrasonic inspection. The stocks containing blocky α,grain boundary α or twisted and elongated α packets first were subjected to β treatment followed by water quenching in order to obtain martensitic structures (α).Then the strain of blade body and platform or root positions was controlled more than 50% in die forging process. The forging temperature was lower than β transformed temperature, i.e., T β-50℃. The first annealing temperature was raised from T β-50℃ to T β-40℃. The annealing time was taken as 3 hours. Finally, the macro and microstructures and room temperature mechanical properties of blade die forgings completely meet the requirements of GJB 494 88.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1997年第2期189-195,共7页
Acta Aeronautica et Astronautica Sinica
关键词
钛合金
β处理
显微组织
机械性能
航空材料
Ti alloys, β treatment, microstructure, mechanic property, control
