Effects of Ultra-Fast Cooling Process on Mechanical Properties of 14.8 mm Hot-Rolled Strip Coil of X100 Pipeline Steel

Special Steel ›› 2015, Vol. 36 ›› Issue (2): 64-67.

Effects of Ultra-Fast Cooling Process on Mechanical Properties of 14.8 mm Hot-Rolled Strip Coil of X100 Pipeline Steel

Zhou Feng^1,2, Wu Kaiming¹ , Chen Jianxin²

1. Hubei Collaborative Innovation Center for Advanced Steels and its Application, International Research Institute for Steel Technology,Wuhan University of Science and Technology,Wuhan 430081;
2. Hualing Lianyuan Iron and Steel Co Ltd, Loudi 417009;

Received:2014-10-12 Online:2015-04-01 Published:2022-08-24

超快冷工艺对X100管线钢14.8 mm热轧带卷力学性能的影响

周峰^1,2，吴开明¹，陈建新²

1. 高性能钢铁材料及其应用湖北省协同创新中心，武汉科技大学国际钢铁研究院，武汉 430081 ；
2. 华菱涟源钢铁有限公司，娄底 417009；

作者简介:周峰(1977-)，男，博士研究生(武汉科技大学)，首席工程师,2000年武汉科技大学(本科)毕业，钢铁产品开发和工艺研究。

Abstract

Abstract: The structure and mechanical properties of 14.8 mm hot-rolled strip coil of X100 pipeline steel (/% : 0.05C, 0.25Si, 1.97Mn, 0.008P, 0.002S, 0.26Cu, 0.36Cr, 0.38Ni, 0.22Mo, 0.03V, 0.02Ti, 0.09Nb, 0.029Als) with finishing rolling at 790-850 °C , after rolling combined ultra-fast cooling and laminar flow cooling with rate 40-60 °C/s cooling to 580 °C and coiling at 380 °C are tested and studied. Results show that the grain size rating of strip coil is 13.5, the banded structure rating is 0-0.5, the structure is granular bainite + martensite and containing 0.2-0.8 μm martensite/austenite island, the impact energy at -20 °C is 265-277 J and it has better comprehensive mechanical properties to meet the requirement of standard " Technical Specification of Hot Rolled Plate Used for Manufacturing Grade X100 SAWL Pipe for Gas Pipeline ".

Key words: X100 Pipeline Steel, 14.8 mm Hot-Rolled Strip Coil, Ultra-Fast Cooling, Structure, Mechanical Properties

摘要： 试验研究终轧温度790~850℃,轧后用超快冷与层流冷却相结合,40~60℃/s冷令却至580℃,卷取温度380℃时X100管线钢(/%:0.05C,0.25Si,1.97Mn,0.008F,0.002S,0.26Cu,0.36Cr,0.38Ni,0.22Mo,0.03V,0.02Ti,0.09Nb,0.029Als)14.8 mm热轧带卷的组织和力学性能。结果表明,该钢带卷的晶粒度为13.5级,带状组织0~0.5级,组织为粒状贝氏体+马氏体,并含有0.2~0.8 μm马氏体/奥氏体岛,-20℃冲击功265~277 J,具有良好的综合力学性能,满足《天然气输送管道X100螺旋缝埋弧焊管用热轧板卷技术条件》标准要求。

关键词: X100管线钢, 14.8 mm热轧带卷, 超快冷, 组织, 力学性能

Zhou Feng , Wu Kaiming , Chen Jianxin. Effects of Ultra-Fast Cooling Process on Mechanical Properties of 14.8 mm Hot-Rolled Strip Coil of X100 Pipeline Steel[J]. Special Steel, 2015, 36(2): 64-67.

周峰, 吴开明, 陈建新. 超快冷工艺对X100管线钢14.8 mm热轧带卷力学性能的影响[J]. 特殊钢, 2015, 36(2): 64-67.

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