摘要
用X射线衍射仪（XRD）、扫描电镜（SEM）、透射电镜（TEM）等研究Ti80合金在3种热处理工艺下的显微组织与硬度。结果表明：当热处理工艺由900℃×1 h/AC改变至980℃×1 h/AC时,合金由等轴组织转变为双态组织,并伴随着初生α相的减少和球化、β相的增多、次生α相与α＇马氏体形态的转变,但合金元素固溶规律无变化;经1020℃×1 h/AC热处理后,合金形成片层组织,初生α相消失、次生α相呈长针丛状在粗大的原始β晶粒内平行分布,此时α＇板条马氏体与α＇孪晶马氏体共存且合金元素分布较均匀;随热处理温度的升高,合金硬度先降低后升高。
Microstructure and hardness of Ti80 alloy after three kinds of heat treatments were investigated by means of X-ray diffraction,scanning electron microscopy and transmission electron microscopy. The results show that when the heat treatment process changes from900 ℃ × 1 h/AC to 980 ℃ × 1 h/AC,the alloy changes from equiaxed structure to double structure,with the decrease and spheroidization of primary α phase,the increase of β phase content and the transformation of the morphology of secondary α phase and α＇ martensite.However,the rule of solid solution of alloy elements does not change. After heat treatment at 1020 ℃ for 1 h then air cooling,the alloy forms lamellar structure,the primary α phase disappears,and the secondary α phase is distributed parallel to the coarse primary β grain in the shape of a long needle cluster. In this case,α＇ lath martensite coexists with α＇ twin martensite,and the alloying elements distribute uniformly,and the hardness of the alloy decreases first and then increases with the increase of heat treatment temperature.
作者
权思佳
宋克兴
张斌斌
王启
郑开宏
张丹丹
QUAN Si-jia;SONG Ke-xing;ZHANG Bin-bin;WANG Qi;ZHENG Kai-hong;ZHANG Dan-dan(Institute of Materials and Engineering, Henan University of Science and Technology, Luoyang 471023, China;Henan Key Laboratory of Advanced Non-ferrous Metals, Luoyang 471023, China;Luoyang Ship Material Research Institute, Luoyang 471039, China;Institute of Metals Processing and Forming Technology, Guangdong General Research Institute of Industrial Technology, Guangzhou 510650, China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2018年第5期44-52,共9页
Transactions of Materials and Heat Treatment
基金
河南省科技攻关计划(国际科技合作)项目(162102410025)
河南省自然科学基金培育项目(162300410085)
关键词
Ti80合金
热处理
显微组织
Ti80 alloy
heat treatment
microscopic structure
