摘要
研究了轧制温度、变形量以及热处理工艺对Ti-1300合金显微组织的影响,并讨论了热加工工艺与合金组织结构以及形貌之间的联系规律。结果表明:两相区轧制后的加工态Ti-1300合金主要由等轴的β相和球状α相组成,随轧制温度向合金相变点温度的升高,α相逐渐溶解在β基体上,因而β单相区轧制的合金主要由等轴的β相晶粒组成,而合金的晶粒随变形量的增加而破碎越充分,组织也更加细小、均匀。两相区固溶处理后的Ti-1300合金在晶界和晶间析出球状以及条状α相,弥散分布于亚稳定β基体,产生细晶强化效应,而β单相区固溶处理后的合金主要由平均晶粒尺寸为60μm的等轴β相组成。两相区固溶处理后的时效态Ti-1300合金的组织主要由条状初生αp相、针状次生αs相以及β基体组成,热轧温度和变形量对时效态Ti-1300合金中αp相的形貌特征影响较小,但αp相和αs相都随时效温度的升高而不同程度的长大,针状次生αs相弥散分布在β基体上。
The effects of rolling temperature, deformation degree and heat treatment on the microstructure of β-1300 alloy were studied with an emphasis on the relationship between the heat processing technique and microscopic structure. The results show that β-1300 alloy with rolling temperature under β-transus temperature is composed of spherical α phase and equiaxed β phase, and α phase dissolves into β matrix with increasing of the rolling temperature. When the rolling temperature is increased to β-transus temperature or higher, the equiaxed β phase becomes the only dominant phase. The grains of Ti-1300 alloy with large structure becomes homogeneous. After α＋β phase region solution treatment, α phase with boundary and intergranular position and then disperse in metastable β matrix, and lead de sph to formation can be greatly refined, and the ericity or strip shape precipitate in grain dispersion strengthening and fine grain strengthening; however, the alloy after β phase region solution treatment is mainly composed of equiaxed fl phase with the average grain size of about 60 μm. The β-1300 alloy after aging treatment is composed of strip ap phase, acicular as phase and fl matrix. There is few influence of the heat processing technique on the morphology parameters of αp phase in Ti-1300 alloy after aging treatment, but the morphology of αp and αs phase grow up with the aging temperature increasing. Acicular as phase is dispersed on the β matrix.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2014年第6期1441-1446,共6页
Rare Metal Materials and Engineering
基金
陕西省重点科技创新团队计划(2012KCT-23)
陕西省科技统筹创新工程项目(2012KCTG04-04)
