|
|
|
| Simulation and experiment investigations on fabrication of Fe-based amorphous powders by a novel atomization process equipped with assisted gas nozzles |
| Jia-qi Liu1, Yan-nan Dong1, Pu Wang1, Huan Zhao2, Jing Pang2, Xiao-yu Li2, Jia-quan Zhang1 |
| 1 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2 Qingdao Yunlu Advanced Materials Technology Co., Ltd., Qingdao 266232, Shandong, China |
|
|
|
|
Abstract Based on computational fluid dynamics method, the effect of atomization gas pressure on the atomization efficiency of Laval nozzle was studied, and then a discrete phase model was established and combined with industrial trials to study the effect of a new type of assisted gas nozzles (AGNs) on powder size distribution and amorphous powder yield. The results show that increasing the atomization pressure can effectively improve the gas velocity for the Laval nozzle; however, it will decrease the aspiration pressure, and the optimal atomization pressure is 2.0 MPa. Compared with this, after the application of AGNs with the inlet velocity of 200 m s-1, assisted gas jet can increase the velocity of overall droplets in the break-up and solidification area by 40 m s-1 and the maximum cooling rate is increased from 1.9×104 to 2.3 ×104 K s-1. The predicted particle behavior is demonstrated by the industrial trails, that is, after the application of AGNs, the median diameter of powders d50 is decreased from 28.42 to 25.56 lm, the sphericity is increased from 0.874 to 0.927, the fraction of amorphous powders is increased from 90.4% to 99.4%, and only the coercivity is increased slightly due to the accumulation of internal stress. It is illustrated that the AGNs can improve the yield of fine amorphous powders, which is beneficial to providing high-performance raw powders for additive manufacturing technology.
|
|
|
|
|
|
| Cite this article: |
|
Jia-qi Liu,Yan-nan Dong,Pu Wang, et al. Simulation and experiment investigations on fabrication of Fe-based amorphous powders by a novel atomization process equipped with assisted gas nozzles[J]. Journal of Iron and Steel Research International, 2023, 30(6): 1142-1155.
|
|
|
|
| [1] |
Chang Liu, Yu-feng Tian, Yong-li Xiao, Yong-qian Li, Yang Li, Guang-qiang Li, Qiang Wang. Numerical investigation of basic oxygen furnace slag modification with gas bottom-blowing and SiO2 modifier[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(7): 1451-1460. |
| [2] |
Yi Wang, Yi-chen Dang, Xiao-qing Chen, Bao Wang, Zhong-qiu Liu, Jian-an Zhou, Chang-yong Chen. Numerical simulation of effect of various parameters on atomization in an annular slit atomizer[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(6): 1128-1141. |
| [3] |
Feng Lu, Hong Zhong, Bo Liu, Jian Xu, Sheng-fu Zhang, Liang-ying Wen. Particle agglomeration behavior in fluidized bed during direct reduction of iron oxide by CO/H2 mixtures[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2023, 30(4): 626-634. |
| [4] |
He-nan Cui, Tao Li, Yu-lin Zhu, Min Tan. Numerical investigation on particles removal by bubble flotation in swirling flow[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2022, 29(6): 961-972. |
| [5] |
Li-li Wang, Yu-zhu Zhang, Yue Long. Numerical investigation of breakup process of molten blast furnace slag through air quenching dry granulation technique[J]. JOURNAL OF IRON AND STEEL RESEARCH,INTERNATIONAL, 2021, 28(1): 10-18. |
| [6] |
Ke-yu Huang, . Ya-qiang Dong . Min Liu . Ji-hang Ren . Shu-han Lu . Zhan-kui Zhao . Chun-tao Chang . Xin-min Wang. Controllable SiO2 coating layer of FeSiBPNb amorphous powder cores with excellent soft magnetic properties[J]. , 2018, 25(6): 624-629. |
|
|
|
|
2023, Vol. 30 
