导管伸出长度对气雾化制备TC4粉末特性的影响

doi:10.12068/j.issn.1005-3026.2018.06.008

东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (6): 797-802.DOI: 10.12068/j.issn.1005-3026.2018.06.008

导管伸出长度对气雾化制备TC4粉末特性的影响

郭快快，刘常升，董欢欢，陈岁元

(东北大学材料科学与工程学院材料各向异性与织构教育部重点实验室，辽宁沈阳110819)

收稿日期:2017-06-27 修回日期:2017-06-27 出版日期:2018-06-15 发布日期:2018-06-22
通讯作者: 郭快快
作者简介:郭快快(1989-)，男，河南平顶山人，东北大学博士研究生；刘常升(1963-)，男，内蒙古奈曼旗人，东北大学教授，博士生导师；陈岁元(1964-)，男，甘肃天水人，东北大学教授，博士生导师.冯明杰(1971-)，男，河南禹州人，东北大学副教授; 王恩刚(1962-)，男，辽宁沈阳人，东北大学教授，博士生导师.
基金资助:
中央高校基本科研业务费专项资金资助项目(N130810001)； NSFC-辽宁联合基金重点项目(U1508213)；广东省前沿与关键技术创新专项资金资助项目(2015B010122001)；国家重点研发计划项目(2017YFB0305801).国家自然科学基金资助项目(51171041).

Effect of Extension Length of Catheter on Properties of TC4 Powder Prepared by Electrode Induction Melting Gas Atomization

GUO Kuai-kuai， LIU Chang-sheng， DONG Huan-huan， CHEN Sui-yuan

Key Laboratory for Anisotropy and Texture of Materials， Ministry of Education， School of Materials Science & Engineering， Northeastern University， Shenyang 110819， China.

Received:2017-06-27 Revised:2017-06-27 Online:2018-06-15 Published:2018-06-22
Contact: LIU Chang-sheng
About author:-
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摘要/Abstract

摘要： 采用电极感应熔炼气雾化法(EIGA)制备TC4钛合金粉末，模拟了雾化流场并研究了环形喷嘴中导管伸出长度对粉末形貌、粒径分布、空心球率、松装密度和流动性等特性的影响.结果表明:随着导管伸出长度的增加，负压区增大，雾化破碎更充分.当导管伸出长度为3mm时，负压区分裂成两个独立的小负压区，制备的粉末中块状粉末和空心球增加.雾化气压为6.0MPa、熔炼功率为60kW、导管伸出长度为2mm时，负压区面积大且呈倒置三角形，充满整个导管下方，液滴雾化破碎更充分;制备的粉末D₍₅₀₎小于90μm，可打印粉末的收得率为51.60%;粉末松装密度为2.870g/cm³，粉末流动性为22.23s/50g，空心球率≤3%，雾化制备的TC4粉末更适合激光直接沉积技术.

关键词: 雾化制粉, TC4钛合金, 环形喷嘴, 雾化模拟, 负压区, 粒径分布

Abstract: TC4 titanium alloy powder was prepared by electrode induction melting gas atomization(EIGA). The atomization flow field was simulated， and the effects of extension length of the catheter on powder morphology， powder size distribution， hollow ball rate， apparent density and flow ability were investigated. The results showed that with the increase of extending length of the catheter， the negative pressure zone increases and the atomization powder is broken more fully.When the extending length is 3mm， negative pressure zone splits into two independent small zones， and the bulk powder and hollow spheres increase. When atomization pressure， the melting power and the extending length are 6.0MPa， 60kW and 2mm， respectively， the negative pressure area， which is large and inverted triangular， fills the lower part of the whole catheter while the atomization is more complete. The printable powder production rate is 51.60%. Apparent density is 2.870g/cm³， flow ability is 22.23s/50g and hollow ball rate is below 3%. TC4 powder prepared by EIGA is more suitable for laser direct deposition.

Key words: atomized powder, TC4 titanium alloy, annular nozzle, atomizing simulation;negative pressure zone, powder size distribution

中图分类号:

TF123.7

郭快快，刘常升，董欢欢，陈岁元. 导管伸出长度对气雾化制备TC4粉末特性的影响[J]. 东北大学学报:自然科学版, 2018, 39(6): 797-802.

GUO Kuai-kuai， LIU Chang-sheng， DONG Huan-huan， CHEN Sui-yuan. Effect of Extension Length of Catheter on Properties of TC4 Powder Prepared by Electrode Induction Melting Gas Atomization[J]. Journal of Northeastern University Natural Science, 2018, 39(6): 797-802.

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导管伸出长度对气雾化制备TC4粉末特性的影响

Effect of Extension Length of Catheter on Properties of TC4 Powder Prepared by Electrode Induction Melting Gas Atomization

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