电子束冷床(EB)炉熔炼TC4合金组织与性能研究  

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

作　　者：唐增辉 辛社伟[2] 洪权[2] 毛小南[2] 张志斌 周伟[2] 李倩[2] 杜彬 周武 TANG Zenghui;XIN Shewei;HONG Quan;MAO Xiaonan;ZHANG Zhibin;ZHOU Wei;LI Qian;DU Bin;ZHOU Wu(Qinghai Supower Titanium Co., Ltd., Xining 810007, China;Northwest Institute for Nonferrous Metal Research, Xi＇ an 710016, China)

机构地区：[1]青海聚能钛业股份有限公司,青海西宁810007 [2]西北有色金属研究院,陕西西安710016

出　　处：《中国材料进展》2018年第3期204-209,共6页Materials China

基　　金：国家强基工程项目(TC150B5C0-2);青海省重点企业技术创新项目(2015-JC-H05)

摘　　要：在前期大量试验基础上,应用电子束冷床(EB)炉一次制备工业化TC4合金扁锭,通过多点取样进行合金扁锭的成分分析,表明所制备的合金铸锭满足国家标准对TC4合金成分均匀性的要求,证明国内已经完全掌握TC4合金EB炉熔炼过程中的元素挥发和控制技术,可以一次熔炼制备TC4合金。应用该铸锭,进行不同变形方式、变形量的加工试验,并对加工的样品进行典型热处理,结果表明在加工的初期和中期,不同变形方式和变形量对本实验EB炉制备的TC4合金扁锭组织影响显著,但不同组织状态下合金力学性能差别不大。随着变形的继续深入,组织差异性逐渐减小,但性能差异性增大。这种不同于常规用电弧炉制备TC4钛合金的规律,可能与EB炉熔炼方法所特有的性质有关,需要进一步研究。On the basis of earlier test results,TC4 industrial ingot was prepared using electron beam cold hearth single melting. The multiple-point 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-step. 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.

关 键 词：电子束冷床炉 TC4合金 加工 显微组织 力学性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程] TF134[金属学及工艺—金属材料]