Continuous Cooling Transformation Curves of Steel 30CrMo Produced by Thin Slab Casting and Rolling Process and Its Application

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Continuous Cooling Transformation Curves of Steel 30CrMo Produced by Thin Slab Casting and Rolling Process and Its Application

更新时间：2026-01-21

- Continuous Cooling Transformation Curves of Steel 30CrMo Produced by Thin Slab Casting and Rolling Process and Its Application
- Special Steel Vol. 33, Issue 3, Pages: 44-46(2012)
- 作者机构：
  
  1. 广州珠江钢铁有限责任公司,广州,510730
  2. 武汉科技大学材料科学与冶金工程学院,武汉,430081
  3. 广钢集团技术中心薄板坯连铸连轧技术研究所,广州,510730
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：26 November 2011，
  
  Online First：13 October 2022，
  
  Published：13 October 2012
- 稿件说明：
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毛新平, 谢利群. Continuous Cooling Transformation Curves of Steel 30CrMo Produced by Thin Slab Casting and Rolling Process and Its Application[J]. Special Steel, 2012, 33(3): 44-46.
DOI：

毛新平, 谢利群. Continuous Cooling Transformation Curves of Steel 30CrMo Produced by Thin Slab Casting and Rolling Process and Its Application[J]. Special Steel, 2012, 33(3): 44-46. DOI：

摘要

采用膨胀法测定了56 mm薄板坯连轧成6 mm板的30CrMo钢(/%:0.32C、0.20Si、0.60Mn、0.20Ni、0.97Cr、0.18Mo)在0.03～15.60℃/s冷却速率下的连续冷却转变(CCT)曲线并观察了各冷却速率下的显微组织。得出30CrMo钢的相变临界点Ac3=800℃

Ac1=735℃

Bs=510℃

Ms=340℃

Mf=220℃。应用结果表明

30CrMo钢6 mm板卷取后的空冷的冷却速率≤0.06℃/s

当卷取温度为610～640℃时获得铁素体+珠光体组织

避免贝氏体形成导致强度显著升高和塑性变差。

Abstract

The continuous cooling transformation ( CCT) curves with cooling rate 0. 03 ~ 15. 60 T/s of Steel 30CrMo (/% : 0. 32C

0. 20Si

0. 60Mn

0. 20Ni

0. 97Cr

0. 18Mo) 6 mm plate continuous-rolled by 56 mm thin slab are measured by using dilatation method and the microstructure of steel with different cooling rate is observed to get the phase transformation point of steel 30CrMo- Ac3 = 800 ℃

Act =735 °C

Bs =510 ℃

Ms = 340 °C and Mf = 220 ℃. Application results show that the cooling rate of 6 mm plate after coiling is ≤0. 06 ℃

as coiling temperature is 610 ~640 ℃，the structure of steel 30CrMo is ferrite + pearlite

it is available to avoid forming bainite structure that leads to obvious increase of strength of steel and deterioration of plasticity of steel.

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