Effects of Controlled Rolling and Controlled Cooling on Microstructure and Mechanical Properties of Low-Alloy Steel Q355D Heavy Plates

吕晓芳; 孙伟; 杜慧起

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Effects of Controlled Rolling and Controlled Cooling on Microstructure and Mechanical Properties of Low-Alloy Steel Q355D Heavy Plates

更新时间：2026-01-21

- Effects of Controlled Rolling and Controlled Cooling on Microstructure and Mechanical Properties of Low-Alloy Steel Q355D Heavy Plates
- Special Steel Vol. 42, Issue 2, Pages: 68-71(2021)
- 作者机构：
  
  1. 邢台职业技术学院资源与环境工程系,邢台,054000
  2. 2天津中德应用技术大学机械工程学院,天津,300350
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：01 September 2020，
  
  Online First：18 April 2022，
  
  Published：18 April 2021
- 稿件说明：
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吕晓芳, 孙伟, 杜慧起. Effects of Controlled Rolling and Controlled Cooling on Microstructure and Mechanical Properties of Low-Alloy Steel Q355D Heavy Plates[J]. Special Steel, 2021, 42(2): 68-71.
DOI：

吕晓芳, 孙伟, 杜慧起. Effects of Controlled Rolling and Controlled Cooling on Microstructure and Mechanical Properties of Low-Alloy Steel Q355D Heavy Plates[J]. Special Steel, 2021, 42(2): 68-71. DOI：

摘要

采用控制轧制工艺对0.14%～0.18%C

1.40%～1.60%Mn Q355D钢250 mm连铸板坯进行热轧

结果表明

在粗轧温度1050～1130℃、精轧温度920℃、终轧温度880℃控制轧制条件下

终冷温度在670℃以下生产的厚板组织细小均匀

生产70mm和80mm规格厚板性能符合Q355D级别要求

并且Z25断面收缩率(RA)为58%～64%满足Z25方向RA≥25%的要求。

Abstract

The 250 mm casting slab of steel Q355D bearing 0. 14% ~ 0. 18% C and 1.40% ~ 1.60% Mn is hot-rolled by the controlled rolling process. The results show that the microstructure of rolled plate is fine and uniform by rough rolling at 1050 - 1130℃

finishing rolling at 920℃ and final rolling at 880 ℃

and the final cooling below 670℃

the properties of the 70 mm and 80 mm thick plate can meet the requirements of Q355D steel grade and the Z25 reduction of area (RA) is 58% 〜64% to meet the requirement of Z25 directionRA≥25%.

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