Preparation of Low-alloy Steel Powders for Additive Manufacturing by VIGA and EIGA Gas Atomization

被引：0

作者：

Lyu Weiyan ^{[1
]}

Yang Fan ^{[1
,2
]}

Han Guofeng ^{[3
]}

Wang Xiaoming ^{[3
]}

Yang Baijun ^{[1
]}

机构：

[1] Inst Met Sci & Technol, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China

[3] Army Acad Armored Forces, Natl Key Lab Remfg, Beijing 100072, Peoples R China

来源：

CHINA SURFACE ENGINEERING | 2020年 / 33卷 / 05期

关键词：

additive manufacturing; gas atomization; metal powder; particle size distribution; oxidation; MECHANICAL-PROPERTIES; LASER; MICROSTRUCTURE; DEPOSITION; OXIDATION;

D O I：

10.11933/j.issn.1007-9289.20200819001

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Vacuum induction gas atomization ( VIGA) and electrode induction gas atomization (EIGA) methods were used to prepare low alloy steel powder 12CrNi2 for additive manufacturing. The particle size distribution, sphericity, cross-sectional morphology and oxygen content of the powders were compared. The results show that the two powders present an approximate sphericity within an trace satellite powder accompanied in the VIGA powders. The median particle size d(50) of VIGA and EIGA powder in the range of 0 similar to 53 mu m according to the particle size distribution curve shows that the values are as 40. 7 and 34. 8 mu m respectively, and the values are as 126. 3 and 127 mu m in the range of 53 similar to 180 mu m respectively. The combination state of Fe 2p and oxygen element was analyzed by XPS, and the results show that the relative content of metallic Fe-0 in surface oxide film of EIGA powder is higher than that of VIGA powder, and the relative content of Fe2+ and Fe3+ in oxidation state is lower. In addition, comparison of the oxidation peaks of Fe 2p at different sputtering times indicating that oxygen element penetrates deeper in VIGA powder and may have formed oxide compounds and is confirmed by the subsequent phase structure analysis of XRD.

引用

页码：115 / 122

页数：8

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