ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2018, Vol. 39 ›› Issue (1): 61-64.

• 组织和性能 • 上一篇    下一篇

海洋平台用钢EH420耐火性能的研究

刘智良,董瑞峰   

  1. 内蒙古工业大学材料科学与工程学院,呼和浩特 010051
  • 收稿日期:2017-08-03 出版日期:2018-02-01 发布日期:2022-07-01
  • 作者简介:刘智良(1981-),男,硕士研究生,2008年内蒙古科技大学(本科)毕业,高强度钢性能研究。
  • 基金资助:
    内蒙古工业大学基金资助项目(ZD201510)

A Study on Fire-Resistant Performance of Steel EH420 for Off-Shore Drilling Platform

Liu Zhiliang , Dong Ruifeng   

  1. School of Materials and Engineering, Inner Mongolia University of Technology, Huhehaote 010051
  • Received:2017-08-03 Published:2018-02-01 Online:2022-07-01
  • Supported by:
    Projects supported by the Inner Mongolia University of Technology Fund (ZD201510)

摘要: 试验用EH420钢(/%:0.20C,0.38Si,1.63Mn,0.007P,0.001S,0.062V,0.017Nb,0.009Ti,0.021Alt,0.38Ni,0.015Cu)20mm板的生产流程为210t BOF-LF-RH-230mm坯连铸-热轧。分别在室温、450、480、500、600℃对EH420钢进行了拉伸试验,并通过扫描电镜观察了拉伸试样断裂形貌和分析了断裂机理。结果表明,该钢室温屈服强度为443 MPa,480℃屈服强度270 MPa,基本为室温屈服强度2/3,因此EH420钢在480℃以下具有耐火性。

关键词: 海洋平台用钢EH420, 耐火性, 组织, 拉伸断口

Abstract: The production flowsheet of 20mm plate of tested steel EH420 (/% : 0.20C, 0.38Si, 1.63Mn, 0.007P, 0.001S, 0.062V, 0.017Nb, 0.009Ti, 0.021 Alt, 0.38Ni, 0.015Cu) is 210t BOF-LF-RH-230 mm slab casing-rolling. The tensile test of steel EH420 is carried out at ambient temperature, 450 °C , 480 °C , 500 °C and 600 °C, the morphology of fracture of steel tensile specimen is observed by scanning electron microscope and the fracture mechanism of steel is analyzed. Results show that the yield strength of steel at ambient temperature is 443 MPa and the yield strength of the steel at 480°C is 270 MPa which is basically equal to two-thirds of the yield strength of steel at ambient temperature, therefore the steel EH420 has fire resistance at less than 480 °C.

Key words: Steel EH420 for Offshore Drilling Platform, Fire Resistance, Structure, Tensile Fracture