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

张军; 李造宇; 杨玲; 郑振宇; 杨娥; 伍伟

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

更新时间：2026-01-21

- Cause Analysis and Process Improvement of Centre Intergranular Crack of Φ200 mm Forging of Steel AISI 410SS
- Special Steel Vol. 41, Issue 5, Pages: 52-54(2020)
- 作者机构：
  
  1. 大冶特殊钢有限公田，黄G,435001
  2. 高品质特殊钢湖北省币点实验室,黄石,435001
  3. 湖北省黄石市产品质量监督检捡所,黄石,435000
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：05 April 2020，
  
  Online First：06 May 2022，
  
  Published：06 May 2020
- 稿件说明：
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张军, 李造宇, 杨玲, et al. Cause Analysis and Process Improvement of Centre Intergranular Crack of Φ200 mm Forging of Steel AISI 410SS[J]. Special Steel, 2020, 41(5): 52-54.
DOI：

张军, 李造宇, 杨玲, et al. Cause Analysis and Process Improvement of Centre Intergranular Crack of Φ200 mm Forging of Steel AISI 410SS[J]. Special Steel, 2020, 41(5): 52-54. DOI：

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

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.

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