文章信息/Info

Title:

Investigation of Microstructure and Properties of TC4 Alloy Using Electron Beam Cold Hearth Melting

作者:

唐增輝1; 辛社偉2; 洪權2; 毛小南2; 張志斌1; 周偉2; 李倩2; 杜彬1; 周武1

1.青海聚能鈦業股份有限公司，青海 西寧 810007 ?2.西北有色金屬研究院，陜西 西安 710016

Author(s):

TANG Zenghui1;  XIN Shewei2;  HONG Quan2;  MAO Xiaonan2;  ZHANG Zhibin1; ZHOU Wei2;  LI Qian2;  DU Bin1;  ZHOU Wu1

1.Qinghai Supower Titanium Co., Ltd., Xining 810007, China ?2.Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China

關鍵詞:

電子束冷床爐; TC4合金; 加工; 顯微組織; 力學性能

Keywords:

electron beam cold hearth melting;  TC4 alloy;  hot working;  microstructure;  mechanical properties

DOI:

10.7502/j.issn.1674-3962.2018.03.07

文獻標志碼:

A

摘要:

在前期大量試驗基礎上，應用電子束冷床（EB）爐一次制備工業化TC4合金扁錠，通過多點取樣進行合金扁錠的成分分析，表明所制備的合金鑄錠滿足國家標準對TC4合金成分均勻性的要求，證明國內已經完全掌握TC4合金EB爐熔煉過程中的元素揮發和控制技術，可以一次熔煉制備TC4合金。應用該鑄錠，進行不同變形方式、變形量的加工試驗，并對加工的樣品進行典型熱處理，結果表明在加工的初期和中期，不同變形方式和變形量對本實驗EB爐制備的TC4合金扁錠組織影響顯著，但不同組織狀態下合金力學性能差別不大。隨著變形的繼續深入，組織差異性逐漸減小，但性能差異性增大。這種不同于常規用電弧爐制備TC4鈦合金的規律，可能與EB爐熔煉方法所特有的性質有關，需要進一步研究。

Abstract:

On the basis of earlier test results, TC4 industrial ingot was prepared using electron beam cold hearth single melting. The multiple�瞤oint element analysis showed the composition uniformity of TC4 alloy met the demand of national standard, indicating that the domestic technology of controlling TC4 element volatilization and alloying during EB melting process had become mature, which enables us to possibly fabricate TC4 alloy via one�瞫tep. Using this TC4 ingot, the experiments of various working modes and deformation amounts were carried out. The results indicated that the deformation mode and deformation amount produced obvious effect on the TC4 ingot’s microstructure, but little effect on properties, and properties with different microstructure showed little difference during processing primary stages and mid stages. As the processing continued, the microstructure difference of the samples decreased but the property difference increased. This tendency is different from the conventional TC4 alloy using consumable electrode vacuum furnace, which may result from its melting method. Further research should be widely carried out.