Effect of Control Rolling and Cooling on Hardness of Steel 38CrMoAl Coil and Optimization of Process

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Effect of Control Rolling and Cooling on Hardness of Steel 38CrMoAl Coil and Optimization of Process

更新时间：2026-01-21

- Effect of Control Rolling and Cooling on Hardness of Steel 38CrMoAl Coil and Optimization of Process
- Special Steel Vol. 40, Issue 3, Pages: 35-38(2019)
- 作者机构：
  
  江苏永钢集团有限公司技术部,张家港,215628
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：28 November 2019，
  
  Online First：16 May 2022，
  
  Published：16 May 2019
- 稿件说明：
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马志军. Effect of Control Rolling and Cooling on Hardness of Steel 38CrMoAl Coil and Optimization of Process[J]. Special Steel, 2019, 40(3): 35-38.
DOI：

马志军. Effect of Control Rolling and Cooling on Hardness of Steel 38CrMoAl Coil and Optimization of Process[J]. Special Steel, 2019, 40(3): 35-38. DOI：

摘要

Φ8～20 mm 38CrMoAl钢(/%:0.35～0.42C

0.20～0.45Si

0.30～0.60Mn

≤0.035P

≤0.035S

1.35～1.65Cr

0.15～0.25Mo

0.70～1.10Alt)的生产工艺为90 t转炉-LF-VD-150 mm×150 mm方坯连铸-连轧。分析了成分、轧制温度、冷却速度对38CrMoAl钢组织的影响。通过将铸坯加热温度、开轧温度和吐丝温度分别由(1100±40)℃

(1020±20)℃(和(900±15)℃降至(1060±40)℃

(980±20)℃和(840±15)℃

同时降低冷却线辊道速度

盘条HB硬度值由284～353降至221～254

显著降低冷拔过程的断丝率。

Abstract

The production process of Φ8 ~20 mm coil of steel 38CrMoAl (/% : 0.35 ~0.42C

0.20 ~ 0.45Si

0.30 ~0.60Mn

≤ 0.035P

≤ 0.035S

1.35 ~ 1.65Cr

0.15 〜0.25Mo

0.70 〜1.l0Alt) is 90 t converter-LF-VD-150 mm X 150 mm billet casting-continuous rolling. The effect of chemical composition

rolling temperature and cooling speed on structure of steel 38CrMoAl has been analyzed. With decreasing the billet heating temperature

beginning rolling temperature and coil laying-off temperature respectively from (1100±40)℃

(1 020 ± 20 )℃ and ( 900 土 15)℃ to (1 060 ± 40)℃

(980 ±20)℃ and (840 ± 15)℃

the HB hardness scale of coil decreases from 284 〜353 to 221 〜254 obviously to decrease the wire breakage rate in cold drawing process of coil.

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