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材料导报  2021, Vol. 35 Issue (8): 8140-8145    https://doi.org/10.11896/cldb.20030200
  金属与金属基复合材料 |
EB炉熔炼TC4钛合金轧制过程中的组织演变与力学性能
王伟1,2, 王萌1, 蔡军1, 张浩泽2,3, 史亚鸣2, 张晓锋2, 黄海广2, 王快社1
1 西安建筑科技大学冶金工程学院,西安 710055
2 云南钛业股份有限公司,楚雄 651209
3 昆明理工大学材料科学与工程学院,昆明 650093
Microstructure Evolution and Mechanical Properties of TC4 Alloy Prepared by Electron Beam Cold Hearth Furnace During Rolling Process
WANG Wei1,2, WANG Meng1, CAI Jun1, ZHANG Haoze2,3, SHI Yaming2, ZHANG Xiaofeng2, HUANG Haiguang2, WANG Kuaishe1
1 School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
2 Yunnan Titanium Industry Co., Ltd, Chuxiong 651209, China
3 School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
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摘要 本实验以电子束冷床熔炼炉(EB炉)熔炼TC4钛合金为研究对象,结合实际生产流程,研究不同变形量和不同温度对TC4钛合金板材显微组织与力学性能的演变规律。结果表明:在相同温度下,随着变形量增加,显微组织中α相的体积分数和尺寸减小而β相体积分数增大,合金的抗拉强度和延伸率均增大;当变形量为30%时,显微组织均表现为片层结构,随着变形温度升高,片层α相长宽比逐渐减小,抗拉强度逐渐升高而延伸率变化不大;当变形量增加到90%时,随着变形温度升高,显微组织由较强的B织构(0002)〈1120〉转化为T织构(1010)〈1120〉和锥面织构(1011)〈1120〉,塑性变形由基面滑移转为柱面滑移,显微组织中α相尺寸减小而β相含量增大,合金的抗拉强度和延伸率均增大。当温度升高到1 000 ℃时,α相完全转变为β相,在随后的冷却过程中细针状次生α相从β晶粒析出,合金的抗拉强度和延伸率均增大。
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王伟
王萌
蔡军
张浩泽
史亚鸣
张晓锋
黄海广
王快社
关键词:  电子束冷床熔炼  TC4钛合金  织构    
Abstract: In this investigation, the effects of the different deformation degree and temperatures on the microstructure evolution and mechanical properties of TC4 titanium alloy fabricated by electron beam cold hearth melting (EBCHM) were investigated. The experimental results showed that as the deformation degree increased at the same temperature, the volume fractions and sizes of α phase were decreased while the volume fractions of β phase were increased, and the ultimate tensile strength (UTS) and ductility of this alloy were both increased. When the deformation degree was 30%, all the microstructures with different temperature were presented lamellar structures. As the deformation temperatures increased, the sizes of lamellar α phases were decreased and the UTS of this alloy were gradually increased while the ductility was changed a little. When the defor-mation degree was 90%, as the deformation temperatures increased the microstructures were changed from strong B textures (0002)〈1120〉 into T texture(1010)〈1120〉 and a small amount of pyramid texture(1011)〈1120〉, the plastic deformation was dominated by the cylindrical slip system and the base slip system. The sizes of α phase were decreased while the volume fractions of β phase were increased in these microstructures, and the UTS and ductility of this alloy were both increased. When the temperature increased to 1 000 ℃, α phases were fully transformed into β phases, the fine-secondary acicular α phases were precipitated from β phase matrix and the UTS and ductility of this alloy were both increased.
Key words:  electron beam cold hearth furnace melting    TC4 titanium alloy    texture
               出版日期:  2021-04-25      发布日期:  2021-05-10
ZTFLH:  TG146.2  
基金资助: 中国博士后基金第65批面上项目(2019M653571)
通讯作者:  gackmol@163.com   
作者简介:  王伟,西安建筑科技大学副教授,博士生导师。2015年9月获得西北工业大学材料加工工程专业博士学位,2018年1月从清华大学机械系博士后流动站出站进入西安建筑科技大学工作至今。他担任多个学术期刊的审稿人,目前发表论文50余篇,主持国家自然基金面上、青年项目等国家级、省部级项目十余项。
引用本文:    
王伟, 王萌, 蔡军, 张浩泽, 史亚鸣, 张晓锋, 黄海广, 王快社. EB炉熔炼TC4钛合金轧制过程中的组织演变与力学性能[J]. 材料导报, 2021, 35(8): 8140-8145.
WANG Wei, WANG Meng, CAI Jun, ZHANG Haoze, SHI Yaming, ZHANG Xiaofeng, HUANG Haiguang, WANG Kuaishe. Microstructure Evolution and Mechanical Properties of TC4 Alloy Prepared by Electron Beam Cold Hearth Furnace During Rolling Process. Materials Reports, 2021, 35(8): 8140-8145.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20030200  或          http://www.mater-rep.com/CN/Y2021/V35/I8/8140
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