Effect of Controlled Rolling and Cooling Process on Microstructures and Mechanical Properties of Low Carbon Bainitic Steel AH80DBD

陈尹泽; 李娜; 宋立伟; 马志强

doi:10.20057/j.1003-8620.2022-00050

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Effect of Controlled Rolling and Cooling Process on Microstructures and Mechanical Properties of Low Carbon Bainitic Steel AH80DBD

更新时间：2026-01-21

- Effect of Controlled Rolling and Cooling Process on Microstructures and Mechanical Properties of Low Carbon Bainitic Steel AH80DBD
- Special Steel Vol. 44, Issue 1, Pages: 97-100(2023)
- 作者机构：
  
  安阳钢铁集团有限责任公司技术中心,安阳,455004
- 作者简介：
- 基金信息：
- DOI：10.20057/j.1003-8620.2022-00050
  CLC：
- Received：17 June 2022，
  
  Online First：31 January 2023，
  
  Published：31 January 2023
- 稿件说明：
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陈尹泽, 李娜, 宋立伟, et al. Effect of Controlled Rolling and Cooling Process on Microstructures and Mechanical Properties of Low Carbon Bainitic Steel AH80DBD[J]. Special Steel, 2023, 44(1): 97-100.
DOI：

陈尹泽, 李娜, 宋立伟, et al. Effect of Controlled Rolling and Cooling Process on Microstructures and Mechanical Properties of Low Carbon Bainitic Steel AH80DBD[J]. Special Steel, 2023, 44(1): 97-100. DOI： 10.20057/j.1003-8620.2022-00050.

摘要

通过宏观断口、扫描断口、金相组织、透射电镜等方法分析了AH80DBD低碳贝氏体钢的组织结构对冲击性能的影响。试验结果表明：该钢轧后冷速22℃/s时，冲击韧性较好(-20℃AKV 204～235 J)

其组织为粒状贝氏体+板条贝氏体+细小的M-A

板条间距200～400 nm

而轧后冷速12℃/s时，板条间距～800 nm

-20℃A

41～57 J

因此，AH80DBD钢在生产过程中冷却速率应≥20℃/s。

Abstract

The effect of microstructure on impact properties of AH80DBD low carbon bainite steel is analyzed by macro-fractography

scanning fractography

metallography and transmission electron microscope. The experimental results show that by cooling rate 22℃/s after rolling

the microstructure with better impact toughness (-20℃ Axy 204-235J) is granular bainite+Lath Bainite+fine M-A. With distance between lath 200-400nm

by cooling rate 12 ℃/s after rolling

the distance between lath is~800nm

and the-20 ℃ A

of steel is only 41-57J. Therefore

the cooling rate of AH8ODB is greater than 20 ℃/s during production.

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