Measurement and Analysis on Dynamic Continuous Cooling Transformation Curves of Casting Bloom of Alloy  Cold-Heading Steel 10B21

马立国; 郭大勇; 王秉喜; 高航; 张博; 金泽宏

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Measurement and Analysis on Dynamic Continuous Cooling Transformation Curves of Casting Bloom of Alloy Cold-Heading Steel 10B21

更新时间：2026-01-21

- Measurement and Analysis on Dynamic Continuous Cooling Transformation Curves of Casting Bloom of Alloy Cold-Heading Steel 10B21
- Special Steel Vol. 39, Issue 3, Pages: 47-50(2018)
- 作者机构：
  
  1. 鞍钢集团钢铁研究院,
  2. 鞍钢股份公司市场营销中心,鞍山,114009
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：29 December 2017，
  
  Online First：02 June 2022，
  
  Published：02 June 2018
- 稿件说明：
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马立国, 郭大勇, 王秉喜, et al. Measurement and Analysis on Dynamic Continuous Cooling Transformation Curves of Casting Bloom of Alloy Cold-Heading Steel 10B21[J]. Special Steel, 2018, 39(3): 47-50.
DOI：

马立国, 郭大勇, 王秉喜, et al. Measurement and Analysis on Dynamic Continuous Cooling Transformation Curves of Casting Bloom of Alloy Cold-Heading Steel 10B21[J]. Special Steel, 2018, 39(3): 47-50. DOI：

摘要

10B21钢280 mm×380 mm连铸坯(/%:0.19C

0.05Si

0.79Mn

0.017P

0.002S

0.17Cr

0.032Ti

0.002 0B

0.025Als)的冶金工艺流程为100 t BOF-LF-VD-CC。利用Gleeble-3800热模拟试验机

测定了10B21钢冷却速度0.2～50℃/s的膨胀曲线

结合热膨胀法和金相-硬度法

获得了该钢的动态连续冷却转变(CCT)曲线。结果表明

在冷却速度0.2～1℃/s时

该钢组织为铁素体(F)和珠光体(P);5～20℃/s可能是魏氏组织(W)形成的冷却速度范围; >5℃/s时

实验钢开始出现贝氏体(B)组织; >10℃/s时

实验钢的组织出现马氏体(M)组织; >25℃/s实验钢的组织主要由B+M组成; >50℃/s时

得到单一的M组织。

Abstract

The metallurgical process flowsheet of 280 mm x 380 mm casting bloom of steel 10B21 (/% : 0. 19C

0.05Si

0.79Mn

0.017P

0. 002S

0. 17Cr

0.032Ti

0.002 0B

0.025Als) is 100 t BOF-LF-VD-GC. By using Gleeble-3800 thermo-mechanical simulator

the dilatometric curves steel 10B21 with cooling rate 0. 2 〜50 ℃/s has been measured and to combined with thermal dilation method and metallography-hardness method the continuous cooling transformation (CCT) curves are obtained. Results show that with cooling rate 0. 2 〜1 ℃/s the structure of steel is ferrite ( F) and pearlite ( P) ； the cooling rate 5 ~20 ℃/s may be the cooling rate range to form Widmannstatten (W) structure; with >5 ℃，the bainite structure (B) initially occurs in tested steel; with >10 ℃/s

the martensite structure (M) occurs in steel; with > 25 ℃/s the main structure in steel consists of B + M ； and with >50 ℃/s it is obtained M structure in steel.

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