Effect of Carbon and Boron Content on Mechanical Properties of Casting Bloom of Low Carbon Cold Heading Steel at Elevated Temperature

段路昭; 苏玉辉; 崔娟; 李永超; 刘超

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Effect of Carbon and Boron Content on Mechanical Properties of Casting Bloom of Low Carbon Cold Heading Steel at Elevated Temperature

更新时间：2026-01-21

- Effect of Carbon and Boron Content on Mechanical Properties of Casting Bloom of Low Carbon Cold Heading Steel at Elevated Temperature
- Special Steel Vol. 36, Issue 4, Pages: 63-65(2015)
- 作者机构：
  
  邢台钢铁有限责任公司，河北省线材工程技术研究中心,邢台,054027
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：15 February 2015，
  
  Online First：26 August 2022，
  
  Published：26 August 2015
- 稿件说明：
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段路昭, 苏玉辉, 崔娟, et al. Effect of Carbon and Boron Content on Mechanical Properties of Casting Bloom of Low Carbon Cold Heading Steel at Elevated Temperature[J]. Special Steel, 2015, 36(4): 63-65.
DOI：

段路昭, 苏玉辉, 崔娟, et al. Effect of Carbon and Boron Content on Mechanical Properties of Casting Bloom of Low Carbon Cold Heading Steel at Elevated Temperature[J]. Special Steel, 2015, 36(4): 63-65. DOI：

摘要

试验的低碳冷镦钢(/%:0.14~0.20C

≤0.20Si

0.3~1.0Mn

≤0.030P

≤0.035S

0~0.001 9B)连铸坯的生产流程为80 t BOF-LF-280 mm×325 mm坯连铸工艺。通过Gleeble-3500热模拟机研究了0.14%~0.20%C和0~0.001 9%B对该冷镦钢600~1 200℃力学性能的影响。结果表明

该钢第Ⅲ脆性区为700~900℃

当钢中C含量较高时

最低塑性的温度较低

硼促使该钢700~950℃脆性区出现两个低谷

但当硼含量增加到0.001 9%时

该钢的高温塑性得到改善。在850~1 200℃

各试验钢的塑性良好

适合较大程度的变形

矫直温度和热加工温度宜控制在850℃以上。

Abstract

The production flowsheet for casting bloom of test low carbon cold heading steel (/% :. 0.14 ~0.20C

≤0.20Si

0.3 ~ 1.0Mn

≤0.030P

≤0.035S

0 ~0.001 9B) is 80 t BOF-LF-280 mm x 325 mm bloom casting process. The effect of 0. 14% 〜0. 20% C and 0 ~ 0. 001 9% B on mechanical properties of the cold heading steel at 600 ~ 1 200 °C has been studied by using Gleeble-3500 thermal simulation machine. Results show that the III brittle zone of the steel is 700 ~ 900 ℃

as the C content in steel is higher the temperature of minimum plasticity of steel is lower； the boron promotes to occur of two valleys in 700 ~ 950℃ brittle zone

but as the B content in steel is up to 0. 001 9%

the elevated temperature plasticity of steel is improved. At 850 ~ 1 200 ℃ each test steel has better plasticity to be suit for larger deformation

therefore straightening and hot-working temperature should be controlled at more than 850 °C.

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