Process Practice on Improvement of 300 mm x 360 mm Casting Bloom Macro-Segregation of 8620 Series Gear Steel

刘勇; 高鹏

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Process Practice on Improvement of 300 mm x 360 mm Casting Bloom Macro-Segregation of 8620 Series Gear Steel

更新时间：2026-01-21

- Process Practice on Improvement of 300 mm x 360 mm Casting Bloom Macro-Segregation of 8620 Series Gear Steel
- Special Steel Vol. 39, Issue 6, Pages: 43-46(2018)
- 作者机构：
  
  河钢集团石钢公司炼钢厂,石家庄,050031
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：19 July 2018，
  
  Online First：26 May 2022，
  
  Published：26 May 2018
- 稿件说明：
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刘勇, 高鹏. Process Practice on Improvement of 300 mm x 360 mm Casting Bloom Macro-Segregation of 8620 Series Gear Steel[J]. Special Steel, 2018, 39(6): 43-46.
DOI：

刘勇, 高鹏. Process Practice on Improvement of 300 mm x 360 mm Casting Bloom Macro-Segregation of 8620 Series Gear Steel[J]. Special Steel, 2018, 39(6): 43-46. DOI：

摘要

8620齿轮钢(/%:0. 18～0.22C

0. 17～0.26Si

0.70～0.90Mn

≤0.025P

0. 15～0.23S

0.40～0.60Cr

0.40～0.70Ni

0.15～0.25Mo)300 mm×360 mm坯连铸的中间包钢水过热度为20～30℃

拉速为0.5～0. 6 m/min

通过钻孔分析、射钉试验、原位分析和铸坯低倍组织分析

研究了电磁搅拌参数[M-EMS(100～200) A

(2.0～2.2)Hz

F-EMS(150～200)A

8 Hz]和二冷水参数(一段28 L/min

二段38～45.6L/min

三段19.2～24L/min)对连铸坯C、S偏析的影响。通过采用优化工艺参数-二冷一段28 L/min

二段45. 6 L/min

三段19. 2 L/min和电磁搅拌M-EMS 150 A

2. 2 Hz

F-EMS 200 A

8 Hz

8620系齿轮钢连铸坯偏析指数0. 98～1.05的比例由原30%提高至92.8%。

Abstract

The superheating extent of liquid of 8620 gear steel (/% : 0. 18 〜0. 22C

0. 17 ~ 0. 26Si

0. 70 ~ 0.90Mn

≤ 0.025P

0.15 ~0.23S

0.40 ~ 0.60Cr

0.40 ~0.70Ni

0.15 〜0.25Mo) for casting 300 mm x 360 mm bloom is 20 ~30 ℃ and the casting speed is 0. 5 ~0. 6 m/min

and by bloom drilling analysis

pin-shooting test

original position analysis and bloom macrostructure analysis the effect of electromagnetic stirring parameters [ M-EMS (100 - 200) A

(2.0 ~ 2.2) Hz

F-EMS ( 150 ~ 200) A

8 Hz] and secondary cooling water parameters (Ⅰ- zone 28 L/min

Ⅱ - zone 38 ~45.6 L/min and Ⅲ- zone 19. 2 ~24 L/min) on C and S segregation in bloom has been studied. With using optimized process parameters- secondary cooling water Ⅰ- zone 28 L/min

Ⅱ - zone 45.6 L/min and Ⅲ- zone 19.2 L/min

and electromagnetic stirring M-EMS 150 A

2. 2 Hz

F-EMS 200 A

8 Hz

the ratio casting bloom of 8620 series gear steel with segregation index 0.98 ~ 1.05 increases to 92.8% from original 30%.

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