Influence of Sizing and Cooling Process on Structure and Mechanical Properties of N80-1 Seamless Casing Tube of Steel 40Mn2V

吴乐胜; 方剑; 李明新; 袁泽喜

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Influence of Sizing and Cooling Process on Structure and Mechanical Properties of N80-1 Seamless Casing Tube of Steel 40Mn2V

更新时间：2026-01-21

- Influence of Sizing and Cooling Process on Structure and Mechanical Properties of N80-1 Seamless Casing Tube of Steel 40Mn2V
- Special Steel Vol. 34, Issue 6, Pages: 45-48(2013)
- 作者机构：
  
  1. 衡阳华菱钢管(集团)有限公司技术中心,衡阳,421001
  2. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,武汉,430081
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：13 May 2013，
  
  Online First：07 September 2022，
  
  Published：07 September 2013
- 稿件说明：
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吴乐胜, 方剑, 李明新, et al. Influence of Sizing and Cooling Process on Structure and Mechanical Properties of N80-1 Seamless Casing Tube of Steel 40Mn2V[J]. Special Steel, 2013, 34(6): 45-48.
DOI：

吴乐胜, 方剑, 李明新, et al. Influence of Sizing and Cooling Process on Structure and Mechanical Properties of N80-1 Seamless Casing Tube of Steel 40Mn2V[J]. Special Steel, 2013, 34(6): 45-48. DOI：

摘要

通过热模拟试验

系统分析了定径温度(820~920℃)、应变量(0.18~0.24)和冷却速率(0.2~2.1℃/s)对N80-1无缝套管(Φ139.70~339.72 mm×6.20~22.22 mm)用钢40Mn2V(/%:0.41C、0.22Si、1.65Mn、0.014P、0.005S、0.15V、0.021 Ti、0.008 0N)组织、拉伸强度和冲击功的影响

并建立了数学模型。结果表明

在给定的定径变形温度下

当冷却速率超过某一临界值时

则发生贝氏体转变对低冲击韧性极为不利。40Mn2V钢适合于钢管冷却速率不超过1.1℃/s的钢管规格

当冷却速率低于0.6℃/s时

合适的定径温度为695~870℃

当冷却速率在0.6~1.1℃/s时

定径温度为695~820℃。

Abstract

The influence of sizing deformation temperature (820 ~ 920 °C )

deformation extent (0. 18 ~ 0. 24) and cooling rate (0. 2 ~2. 1 ℃/s) on structure

tensile strength and impact energy of steel 40Mn2V (/% : 0. 41C

0. 22Si

1.65Mn

0.014P

0. 005S

0. 15V

0.021Ti

0.008 0N) for N80-1 seamless casing tube (Φ139. 70 ~ 339. 72 mm x 6. 20 ~22. 22 mm) is systematically analyzed by hot simulation test

and a math model is established. Results show that at defined sizing deformation temperature

as cooling rate of steel is higher than a critical value

the bainite transformation occurs in structure led to poor impact toughness of steel; steel 40Mn2V is available for the tube size with cooling rate less than 1. 1 ℃/s

the suitable process parameters are that as cooling rate less than 0. 6 ℃/s

the sizing temperature is 695 ~870℃

and as cooling rate 0. 6 ~ 1. 1 °C/s

the sizing temperature is 695 ~ 820 ℃.

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