东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (4): 478-482.DOI: 10.12068/j.issn.1005-3026.2019.04.005

• 材料与冶金 • 上一篇    下一篇

冷却工艺参数对海洋工程用H型钢组织性能的影响

董春宇, 赵宪明, 周晓光, 赵景莉   

  1. (东北大学 轧制技术及连轧自动化国家重点实验室, 辽宁 沈阳110819)
  • 收稿日期:2018-02-03 修回日期:2018-02-03 出版日期:2019-04-15 发布日期:2019-04-26
  • 通讯作者: 董春宇
  • 作者简介:董春宇(1993-),男,辽宁铁岭人,东北大学博士研究生; 赵宪明(1965-),男,辽宁桓仁人,东北大学教授,博士生导师.
  • 基金资助:
    国家重点研发计划项目(2016YFB0300603).

Effect of Cooling Process Parameters on Microstructure and Mechanical Properties of Marine Engineering H-Beam Steel

DONG Chun-yu, ZHAO Xian-ming, ZHOU Xiao-guang, ZHAO Jing-li   

  1. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China.
  • Received:2018-02-03 Revised:2018-02-03 Online:2019-04-15 Published:2019-04-26
  • Contact: ZHAO Xian-ming
  • About author:-
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摘要: 通过对SM490YB实验钢进行热轧和超快速冷却实验,研究了不同工艺参数对实验钢厚度方向不同位置的显微组织的影响,分析了SM490YB实验钢的强韧化机理.实验结果表明:随着终冷温度的降低,实验钢厚度方向相同位置的贝氏体和针状铁素体含量逐渐增加,多边形铁素体和珠光体含量减少;实验钢的强度和低温韧性随着终冷温度的降低而增加,终冷温度为480℃、返热温度为554℃时,力学性能最佳.冷却速率的增加可以提高实验钢的强度,但过快的冷却速率会损害材料的韧性.

关键词: 海洋工程用H型钢, 超快冷, 高强度, 大规格, 贝氏体

Abstract: The effect of different process parameters on the microstructure and mechanical properties of marine engineering H-beam steel(SM490YB) were studied through the hot rolling and ultra-fast cooling experiments. The mechanisms of strengthening and toughening of SM490YB steel were analyzed. The results showed that with decreasing temperature of the final cooling, the contents of bainite and acicular ferrite increase at the same position in thickness direction of the tested steel, in contrast to those of polygonal ferrite and pearlite. Moreover, the strength and low-temperature toughness of the steel increase with the decrease of the final cooling temperature. When the final cooling temperature is 480℃ and the heat return temperature is 554℃, the performance of mechanical property is the best. The increase of the cooling rate can improve the strength of the tested steel, however the excessive cooling rate can deteriorate the toughness.

Key words: marine engineering H-beam steel, ultra-fast cooling, high strength, large size, bainite

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