摘要
研究了普通退火和简单双重退火两种热处理工艺对TC18钛合金板材性能和组织的影响,旨在寻找可替代GJB 3763A—2004推荐的复杂双重退火(含中间缓冷工艺)的简化方案。普通退火工艺设定在795~875℃保温2h后空冷(AC);简单双重退火采用两阶段热处理制度:第一阶段795~875℃保温2h后空冷(AC),第二阶段550~650℃保温4h后炉冷(FC)。热处理后对板材进行了室温拉伸试验和显微组织分析。结果表明:经普通退火处理的板材强度较低且塑性较差,不具备替代价值;而经简单双重退火处理后,筛选出3组工艺参数(795℃×2h/AC+600℃×4h/FC、795℃×2h/AC+650℃×4h/FC、835℃×2h/AC+650℃×4h/FC),其强度和塑性综合性能与GJB 3763A—2004推荐的复杂双重退火工艺相当。
This study primarily investigates the effects of two heat treatment processes,common annealing and simple double annealing,on the properties and microstructure of TC18 titanium alloy plate.The aim is to find a simplified alternative to the complex double annealing process(including intermediate slow cooling)recommended by GJB 3763A-2024.The common annealing process involved holding within the temperature range of 795~875℃for 2 hours followed by air cooling(AC).The simple double annealing employed a two-stage heat treatment:the first stage involved holding at 795~875℃for 2h followed by AC,and the second stage involved holding at 550~650℃for 4h followed by furnace cooling(FC).After heat treatment,room temperature tensile tests and microstructural analysis were performed on the plate.The results indicate that the plate treated with common annealing exhibited lower strength and poorer plasticity,rendering it unsuitable as a replacement.However,after simple double annealing treatment,three sets of process parameters were identified(795℃×2h/AC+600℃×4h/FC,795℃×2h/AC+650℃×4h/FC,835℃×2h/AC+650℃×4h/FC)whose comprehensive strength-plasticity properties were equivalent to those achieved with the complex double annealing process recommended by GJB 3763A.
作者
周雪红
贾云云
李伟基
王瑞苗
ZHOU Xuehong;JIA Yunyun;LI Weiji;WANG Ruimiao(Xinjiang Xiangrun New Materials Technology Co.,Ltd.,Hami 839000,Xinjiang,China)
出处
《金属加工(热加工)》
2025年第8期111-115,123,共6页
MW Metal Forming
基金
新疆维吾尔自治区重点研发任务专项(2022B01029)。
关键词
TC18钛合金
普通退火
双重退火
强塑积
显微组织
TC18 titanium alloy
conventional annealing
double annealing
strength-ductility product
microstructure
