|
|
Segregation of Niobium During Electroslag Remelting Process |
DONG Yan��wu1,JIANG Zhou��hua1,LI Zheng��bang2 |
1. School of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China; 2. Central Iron and Steel Research Institute, Beijing 100081, China |
|
|
Abstract Experiment was carried out after the process parameters were calculated by the model previously established. The relationship between interdendritic spacing and local solidification time (LST) mainly determined by process parameters was exposed. Furthermore, the extent of segregation was studied. The results indicate that LST and interdendritic spacing are the largest and the amount of Laves phase as a result of the niobium segregation is the highest in the center of the ingot, whereas the opposite results are obtained at the edge of ingot. The extent of element segregation and the amount of Laves phase can be reduced when appropriate parameters are used. Therefore, the duration of subsequent homogenization treatments for 718 is shortened and the alloy quality is improved.
|
Received: 01 January 1900
|
|
|
|
[1] |
Jia-long Tian,,Wei Wang,,Wei Yan,,Zhou-hua Jiang,Yi-yin Shan,,Ke Yang. Microstructure characteristics of segregation zone in 17-4PH stainless steel piston rod[J]. Chinese Journal of Iron and Steel, 2017, 24(7): 718-723. |
[2] |
Wan-ming Li,Zhou-hua Jiang,,*,Xi-min Zang,Xin Deng. Modeling of flow and temperature distribution in electroslag remelting withdrawal process for fabricating large-scale slab ingots[J]. Chinese Journal of Iron and Steel, 2017, 24(6): 569-578. |
[3] |
Yu Xu,,En-gang Wang,,*,Zhuang Li,,An-yuan Deng,. Effects of vertical electromagnetic stirring on grain refinement and macrosegregation control of bearing steel billet in continuous casting[J]. Chinese Journal of Iron and Steel, 2017, 24(5): 483-489. |
[4] |
Yang Liu,Xin-hua Liu*,Hua-dong Fu,Min-xuan Lou,Jian-xin Xie. Effects of process parameters on surface quality, composition segregation, microstructure and properties of QSn6.5-0.1 alloy slabs fabricated by HCCM horizontal continuous casting[J]. Chinese Journal of Iron and Steel, 2017, 24(3): 273-281. |
[5] |
Hui-hui Xiong,,*,Heng-hua Zhang,Hui-ning Zhang,Yang Zhou. Effects of alloying elements X (X=Zr, V, Cr, Mn, Mo, W, Nb, Y) on ferrite/TiC heterogeneous nucleation interface: first-principles study[J]. Chinese Journal of Iron and Steel, 2017, 24(3): 328-334. |
[6] |
Hai-feng LI,Heng ZHOU,Tao ZHANG,Yang YOU,Zong-shu ZOU,Wan-ren XU. Influence of Screw Design on Burden Descending Velocity and Particle Segregation in COREX Shaft Furnace[J]. Chinese Journal of Iron and Steel, 2016, 23(6): 516-524. |
|
|
|
|