阎相忠,但磊,杨屹,田彦康,黄坤兰.电场升温速率对成型Ti6Al4V钛合金微齿轮的影响[J].稀有金属材料与工程,2020,49(10):3294~3300.[yanxiangzhong,danlei,yangyi,tianyankang,huangkunlan.Effect of Heating Rate on Formability of Ti6Al4V Alloy Micro-gear under an Electric Field[J].Rare Metal Materials and Engineering,2020,49(10):3294~3300.]
电场升温速率对成型Ti6Al4V钛合金微齿轮的影响
投稿时间:2020-02-24  修订日期:2020-03-28
中文关键词:  Ti6Al4V钛合金, 微齿轮,电场,升温速率,成型性
基金项目:National Nature Science Foundation of China (no.51705348), Sichuan science and technology program (no.2019YFG0359) and the Research Funds for the Central University (no.2019SCUH0013)
中文摘要:
      采用电场辅助微塑性模锻成形技术,用于成型高强度、大硬度、低塑性的Ti6Al4V钛合金微齿轮。实验结果表明,在电场作用下,圆柱形Ti6Al4V坯料在石墨模具中可以成型微齿轮。Ti6Al4V材料在加热速率为5℃/s时具有最佳的可成型性,较高的加热速率30℃/s和40℃/s可以有效地缩短材料预变形的时间。经电场辅助成型的样品均具有魏氏结构,但齿顶比齿心的组织更细小。加热速率为5℃/s和10℃/s的试样β相含量略高于原始坯料,但加热速率为20℃/s、30℃/s和40℃/s的试样没有显示出β相。此外,在电场作用下,所有成形样品的维氏硬度均有所增加。
Effect of Heating Rate on Formability of Ti6Al4V Alloy Micro-gear under an Electric Field
英文关键词:Ti6Al4V alloy  hard-to-deform  electric field  micro-gear  formability
英文摘要:
      In this paper, a novel micro plastic forming technology is introduced for the forming of micro-gear using the high strength, toughness, and hard-to-deform Ti6Al4V alloy material. The experimental results showed that the Ti6Al4V alloy micro-gear can be achieved successfully from a cylindrical Ti6Al4V billet with a set of graphite die under an electric field. The Ti6Al4V material exhibits the best formability when the heating rate is 5 ℃/s, however, higher heating rate 30 ℃/s and 40 ℃/s can effectively shorten the time for pre-heating the material for deformation. The microstructure in all the formed samples have the Widmanst?tten structure. but gear center in contradiction to tooth top which exhibit a finer microstructure, and the β phase content of specimens with the heating rates of 5 ℃/s and 10 ℃/s are slightly higher than the original billet but specimens involving in heating rates 20 ℃/s, 30 ℃/s, and 40 ℃/s show nothing of the β phase from XRD analysis. Moreover, Vickers hardness of all formed samples increase than that of the original billet after an electric field, and which is independent on the heating rates.
作者单位E-mail
阎相忠 四川大学 lutxiang@126.com 
但磊 四川大学  
杨屹 四川大学  
田彦康 Strathclyde University  
黄坤兰 四川大学 huangkunlan@scu.edu.cn 
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