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 ›› 2020, Vol. 41 ›› Issue (5): 52-54.

• 组织和性能 • 上一篇    下一篇

AISI 410SS钢Φ200 mm锻材轴心晶间裂原因分析与工艺改进

张军1,3, 李造宇1,3, 杨玲2, 郑振宇1,3, 杨娥1,3, 伍伟1,3   

  1. 1大冶特殊钢有限公田,黄G 435001 ;
    2湖北省黄石市产品质量监督检捡所,黄石435000 ;
    3高品质特殊钢湖北省币点实验室,黄石435001;
  • 收稿日期:2020-04-05 出版日期:2020-10-01 发布日期:2022-05-06
  • 作者简介:张军(1983-),男,工程师,2006年太原理工大学(本科)毕业,不锈钢产品研究和开发。

Cause Analysis and Process Improvement of Centre Intergranular Crack of Φ200 mm Forging of Steel AISI 410SS

Zhang Jun1,3, Li Zaoyu1,3 , Yang Ling2, Zheng Zhenyu1,3 , Yang E1,3 ,Wu Wei1,3   

  1. 1 Daye Special Steel Co Ltd,Huangshi 435001 ;
    2 Hubei Huangsh) Product Quality Supervision and Inspection Institute,Huangshi 435000;
    3 Hubei province Key Laboratory for High Quality Special Steel; Huangshi 435001)
  • Received:2020-04-05 Published:2020-10-01 Online:2022-05-06

摘要: 规格Φ200 mm的AISI 410SS钢生产流程为20t电弧炉冶炼→LF→VD→3t铸锭→锻造。通过对轴心晶间裂的微观形貌、形成机理进行综合分析,钢液凝固过程中心部位置冷却慢导致成分偏析而形成的铁素体增加和夹杂物聚集,最终导致锻材轴心晶间裂。通过对成分进行调整,奥氏体形成元素分别由原0.11C-0.16Ni-0.55Mn增加至0.14C-0.45Ni-0.78Mn和铁素体形成元素由原12.84Cr-0.46Si-0.20Mo-0.0022 Nb减少至11.81Cr-0.31Si-0.10Mo-0.005Nb,铁素体由4%降至0.5%,轴心晶间裂由0.5级降至0级

关键词: AISI 410SS钢, 轴心品间裂, 铁素体

Abstract: The production process of Φ200 mm steel AISI 410SS is 20 t EAF-LF-VD-3 t ingot-forging. Through comprehensive analysis on the micro-morphology and formation mechanism of centre intergranular cracks, it is found that slow cooling of the central part of the liquid steel during solidification results in composition segregation, increasing ferrite formation and inclusion clustering finally led to forgings axis intergranular cracks. By adjusting the composition, increasing austenite-forming elements from original 0.11C-0.16Ni~0.55Mn to 0.14C-0.45Ni-0.78Mn and reducing ferrite-forming elements from original 12.84Cr-0.46S1-0.20Mo-0.022Nl)to 11.81Cr-0.31 Si-0.l0Mo-O.005Nb, the ferrite in steel decreases from original 4% to 0. 5% and the axis intergranular crack rating decreases for 0.5 rating to 0.

Key words:  , Steel AISI 410SS, Axial Intergranular Crack, Ferrite ,