Elevated Temperature Performance of Casting Slab of High Strength Weather-Resisting Steel Q450NQR1

黎建全; 杨素波; 高兴健; 陈登福; 宋立伟; 毕艳艳

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Elevated Temperature Performance of Casting Slab of High Strength Weather-Resisting Steel Q450NQR1

更新时间：2026-01-21

- Elevated Temperature Performance of Casting Slab of High Strength Weather-Resisting Steel Q450NQR1
- Special Steel Vol. 31, Issue 3, Pages: 54-56(2010)
- 作者机构：
  
  1. 攀枝花钢钥有限公司,攀枝花,617067
  2. 重庆大学材料科学与工程学院,重庆,400030
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：03 November 2009，
  
  Online First：07 November 2022，
  
  Published：07 November 2010
- 稿件说明：
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黎建全, 杨素波, 高兴健, et al. Elevated Temperature Performance of Casting Slab of High Strength Weather-Resisting Steel Q450NQR1[J]. Special Steel, 2010, 31(3): 54-56.
DOI：

黎建全, 杨素波, 高兴健, et al. Elevated Temperature Performance of Casting Slab of High Strength Weather-Resisting Steel Q450NQR1[J]. Special Steel, 2010, 31(3): 54-56. DOI：

摘要

采用DIL402C热膨胀仪和Gleeble-1500D热模拟试验机

测试了Q450NQR1钢(%:0.05～0.10C、0.30～0.50Si、0.80～1.00Mn、0.20～0.30Cu、0.15～0.35Ni、0.40～0.60Cr)200 mm×1 350 mm铸坯的热膨胀性能和高温力学性能。结果表明

升-降温速率由5℃/min提高至10℃/min时

升温相变温度区间上移

降温相变区间下移;Q450NQR1钢连铸坯二次脆性区为750～1 050℃

铸坯的矫直温度应≥1 050℃。

Abstract

Thermal expansion characteristics and elevated temperature mechanical properties of 200 mm x 1 350 mm casting slab of steel Q450NQR1 (% ： 0. 05 ~0. 10C

0. 30 ~0. 50Si

0. 80 ~ 1. 00Mn

0. 20 ~0. 30Cu

0. 15 ~0. 35Ni

0. 40 - 0. 60Cr) have been examined by using thermal expansion tester DIL402C and thermal simulater Gleeble-1500D. Results show that with increasing heating and cooling rate from 5 ℃/min to 10 ℃/min

the heating phase transformation region moves up and the cooling phase transformation region moves down； the secondary brittleness zone of casting slab of steel Q450NQR1 is 750 ~ 1 050 ℃

therefore the straightening temperature of slab should be ≥1 050 ℃.

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