Numerical Simulation on Temperature Change of 325 mm x 280 mm Bloom of Bearing Steel during Casting-Breakdown Process Flowsheet

党爱国; 崔娟; 李永超; 冯艳

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Numerical Simulation on Temperature Change of 325 mm x 280 mm Bloom of Bearing Steel during Casting-Breakdown Process Flowsheet

更新时间：2026-01-21

- Numerical Simulation on Temperature Change of 325 mm x 280 mm Bloom of Bearing Steel during Casting-Breakdown Process Flowsheet
- Special Steel Vol. 36, Issue 2, Pages: 17-20(2015)
- 作者机构：
  
  1. 邢台钢铁有限责任公司,邢台,054027
  2. 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：20 October 2014，
  
  Online First：22 August 2022，
  
  Published：22 August 2015
- 稿件说明：
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党爱国, 崔娟, 李永超, et al. Numerical Simulation on Temperature Change of 325 mm x 280 mm Bloom of Bearing Steel during Casting-Breakdown Process Flowsheet[J]. Special Steel, 2015, 36(2): 17-20.
DOI：

党爱国, 崔娟, 李永超, et al. Numerical Simulation on Temperature Change of 325 mm x 280 mm Bloom of Bearing Steel during Casting-Breakdown Process Flowsheet[J]. Special Steel, 2015, 36(2): 17-20. DOI：

摘要

通过数值模拟和现场实测的方法研究了在连铸、保温输送、堆垛冷却、加热炉加热等工艺过程中325 mm ×280 mm GCr15轴承钢连铸坯温度的变化。结果表明

铸坯在出拉矫机后的单辊道输送过程不同部位的冷却速率差异较大(角部10℃/min、表面7.1℃/min、芯部4.6℃/min)

而在保温车输送过程(角部4℃/min、表面2.9℃/min、芯部1.67℃/min)及堆垛冷却期间不同部位的冷却速率差异较小

因此缩短在连铸机尾部的停留时间有利于防止因冷却不均产生微小裂纹。热送热装较冷装工艺可使铸坯的加热时间减少20 min。

Abstract

The temperature change of 325 mm X 280 mm casting bloom of bearing steel GCr15 during process including casting

holding conveying

stacking cooling and heating in heating furnace has been studied by using numerical simulation method and temperature-measuring in situ. Results show that with bloom out of withdrawal and straightening device during conveying process by single roller way

the difference of cooling rate at different parts of casting bloom is larger i. e. the cooling rate at comer 10 ℃/min

surface 7.1 ℃/min and core of bloom 4.6 ℃/min

while the difference of cooling rate at different parts of casting bloom is smaller during conveying process with holding pot ( comer 4 °C /min

surface 2.9 ℃/min and core 1.67 ℃/min) and during stacking cooling period

therefore to shorten the remaining time at tail of caster is available to avoid tiny cracks caused by uneven cooling. As compared by cold charging

the heating time of bloom shall be decreased by 20 min by hot charging process.

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