Effect of Finishing Rolling Process on Structure and Performance of 30 mm X65 Pipeline Steel Heavy Plate

熊玉彰; 李银华; 王世森; 徐进桥; 余宏伟

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Effect of Finishing Rolling Process on Structure and Performance of 30 mm X65 Pipeline Steel Heavy Plate

更新时间：2026-01-21

- Effect of Finishing Rolling Process on Structure and Performance of 30 mm X65 Pipeline Steel Heavy Plate
- Special Steel Vol. 32, Issue 6, Pages: 53-55(2011)
- 作者机构：
  
  1. 武钢集团公司研究院,武汉,430080
  2. 武钢集团鄂钢公司技术中心,鄂州,436000
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：08 June 2011，
  
  Online First：19 October 2022，
  
  Published：19 October 2011
- 稿件说明：
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熊玉彰, 李银华, 王世森, et al. Effect of Finishing Rolling Process on Structure and Performance of 30 mm X65 Pipeline Steel Heavy Plate[J]. Special Steel, 2011, 32(6): 53-55.
DOI：

熊玉彰, 李银华, 王世森, et al. Effect of Finishing Rolling Process on Structure and Performance of 30 mm X65 Pipeline Steel Heavy Plate[J]. Special Steel, 2011, 32(6): 53-55. DOI：

摘要

Nb-Ti微合金化X65管线钢(/%:0.07C、1.60Mn、0.35Mo)的生产工艺流程为130 t顶底复吹转炉-钢包吹氩-LF-RH-250 mm×1500 mm板坯连铸-连轧至30 mm板-控冷工艺。研究了第Ⅱ阶段开轧(890～940℃)轧后冷却温度(780～850℃)和冷却速度(8～20℃/s)对X65钢厚板拉伸、落锤性能和组织的影响。结果表明

Ⅱ阶段开轧温度为940℃

轧后冷却速度为20℃/s可以使X65钢厚板得到以针状铁素体和粒状贝氏体为主的组织

钢板抗拉强度665～695 MPa

屈服强度495～520 MPa

落锤纤维组织率约为92%

满足标准要求。

Abstract

The production flow sheet for Nb-Ti microalloying pipeline steel X65 (/%: 0. 07C

1. 60Mn

0. 35Mo) is 130 t top and bottom combined blown converter-ladle argon blowing-LF-RH-250 mm X 1 500 mm slab casting-continuous rolling to 30mm plate-control cooling process. The effect of beginning rolling temperature (890 ~940 °C) in II rolling passes

cooling temperature (780 ~ 850℃) and cooling speed (8 ~ 20 ℃/s) after rolling on tensile properties

drop-weight tear test (DWTT) performance and structure of X65 steel heavy plate has been studied. Results show that with beginning rolling temperature 940 ℃ in II rolling passes and cooling speed 20 ℃/s after rolling the main structure in X65 steel heavy plate is acicular ferrite and granular bainite

the tensile strength and yield strength of plate are respectively 665 ~ 695 MPa and 495 〜520 MPa and the DWTT fibre structure ratio of plate is about 92% to meet the requirement of standard.

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