ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2018, Vol. 39 ›› Issue (5): 44-47.

所属专题: 特种冶炼

• 工艺技术 • 上一篇    下一篇

电磁搅拌对GH4169合金1 t电渣锭凝固组织的影响

吕 达, 张雲飞, 张福利,韩彦光,任帅,崔毅,白丽娟   

  1. 河北钢铁技术研究总院,石家庄050000
  • 收稿日期:2018-06-13 出版日期:2018-10-01 发布日期:2022-05-30
  • 作者简介:吕 达(1987-),男,硕士(2016年华北理工大学),工程师,2010年河北理工大学(本科)毕业,钢铁材料研究。

Effect of Electromagnetic Stirring on Solidification Structure of 1 t Electroslag Remelting Ingot of Alloy GH4169

Lü Da, Zhang Yunfei, Zhang Fuli, Han Yanguang, Ren Shuai, Cui Yi , Bai Lijuan   

  1. Hebei Iron and Steel Technology Research Institute, Shijiazhuang 050000
  • Received:2018-06-13 Published:2018-10-01 Online:2022-05-30

摘要: 研究了 1 t电渣锭重熔过程未加电磁搅拌和6 Hz,50 - 200 A电磁搅拌对GH4169合金(/% :0.04C, 0.21Si,0.05Mn,52. 85Ni,19. 8OCr,5.20Nb,3.05Mo,0.55A1,1.02Ti)凝固组织的影响。结果表明,电磁搅拌可以显 著细化合金晶粒,增大等轴晶比率,降低二次枝晶间距;但当搅拌电流N100 A时,电渣锭的共晶组织增多,降低了 电渣锭的塑性;当电流为50 A,频率为6 Hz时,等轴晶比例最高,二次枝晶间距最小,电渣锭中心位置Laves相含量 最低,合金中共晶组织最少,合金塑性最好。

关键词: GH4169合金, 1t电渣锭, 电磁搅拌, 凝固组织, 二次枝晶间距, Laves相

Abstract: Effect of the non-electromagnetic stirring ( non-EMS) and the EMS with 6 Hz and 50 ~ 200 A in 1 t electroslag remelting (ESR) process on solidification structure o£ alloy GH4169 (/% : 0.04C, 0.21 Si, 0.05Mn, 52. 85Ni, 19. 80Cr, 5.20Nb, 3.05Mo, 0.55Al, 1.02Ti) has been studied. Results show that the EMS may obviously fine grains of alloy, increase ratio of equiaxed crystal and decrease spacing between secondary dentritic arms ; but as stirring electric current intensity is >100 A, the eutectic structure in ESR ingot increases to reduce the plasticity of ingot; as the current intensity is 50 A with frequency 6 Hz, the ratio of equiaxed crystal is max and the spacing between secondary dentritic arms is minimum, the Laves phase content in center of ESR ingot is lowest and the alloy with minor eutectic structure to get excellent plasticity of alloy.