| 摘要: |
| 分别采用真空感应熔炼惰性气体雾化(VIGA)和无坩埚电极感应熔化气体雾化(EIGA)两种气雾化方式制备增材制造用 12CrNi2 低合金钢粉末。 对比获得粉末的粒径分布、球形度、截面形貌及氧形态,结果表明:两种粉末球形度良好,VIGA 粉末有微量卫星粉存在;对 0~ 53 μm、53 ~ 180 μm 范围内粉末进行粒度分析,发现 EIGA 粉末中值粒径 d50 分别为 34. 8 和 127 μm,VIGA 粉末中值粒径 d50 分别为 40. 7 和 126. 3 μm。 通过 XPS 分析 Fe 2p 与氧元素的结合状态, 结果表明:对比 VIGA 粉末,EIGA 粉末表面氧化膜中金属态 Fe0 的含量更高,氧化态 Fe2+和 Fe3+的含量更低。 此外,对比不同溅射时间下 Fe 2p 氧化态峰的状态,发现氧元素在 VIGA 粉末中渗透更深,并可能生成了氧化物,这一推测通过 XRD 相组织分析得到了验证。 |
| 关键词: 增材制造 气体雾化 金属粉末 粒度分布 氧化 |
| DOI：10.11933/j.issn.1007-9289.20200819001 |
| 分类号:TG156.88;TB114.2 |
| 文章编号:1007-9289(2020)05-0115-08 |
| 文献标识码:A |
| 基金项目:国家重点研发计划(2016YFB1100204) |
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| Preparation of Low-alloy Steel Powders for Additive Manufacturing by VIGA and EIGA Gas Atomization |
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Lv Weiyan1, Yang Fan1,2, Han Guofeng3, Wang Xiaoming3, Yang Baijun1
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1.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Shenyang 110016 , China;2.School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016 , China;3.National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072 , China
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| Abstract: |
| 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 mor- phology and oxygen content of the powders were compared. The results show that the two powders present an approximate sphe- ricity within an trace satellite powder accompanied in the VIGA powders. The median particle size d50 of VIGA and EIGA powder in the range of 0~ 53 μm according to the particle size distribution curve shows that the values are as 40. 7 and 34. 8 μm respec- tively, and the values are as 126. 3 and 127 μm in the range of 53~ 180 μm respectively. The combination state of Fe 2p and ox- ygen element was analyzed by XPS, and the results show that the relative content of metallic Fe0 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. |
| Key words: additive manufacturing gas atomization metal powder particle size distribution oxidation |
