• 中国学术期刊(光盘版)全文收录期刊
  • 中国学术期刊综合评价数据库来源期刊
  • 中国期刊网、万方数据库入编期刊
  • 中文科技期刊数据库(全文版)收录期刊
  • 中国期刊全文数据库全文收录期刊
  • 中国机械工程学会 理化检验分会 失效分析分会 会刊
Advanced Search
GAN Wenwen, XIAO Juan, ZHAO Xianping. Reasons for unqualified elongation after fracture of Q235B steel medium thick plate[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2022, 58(9): 39-41,44. DOI: 10.11973/lhjy-wl202209010
Citation: GAN Wenwen, XIAO Juan, ZHAO Xianping. Reasons for unqualified elongation after fracture of Q235B steel medium thick plate[J]. PHYSICAL TESTING AND CHEMICAL ANALYSIS PART A:PHYSICAL TESTING, 2022, 58(9): 39-41,44. DOI: 10.11973/lhjy-wl202209010

Reasons for unqualified elongation after fracture of Q235B steel medium thick plate

More Information
  • Received Date: January 27, 2022
  • The elongation after fracture of Q235B steel medium thick plate tensile specimen was unqualified in the mechanical property test. The reasons for unqualified elongation after fracture of the sample were analyzed by macroscopic observation, chemical composition analysis, metallographic examination, scanning electron microscope and energy spectrum analysis. The results show that the main reason for the unqualified elongation after fracture of the sample was that during the steelmaking process, the tundish temperature was high, and the speed of the continuous casting slab was slow, resulting in the segregation of S element. The ferrite segregation band was formed by MnS inclusion as nucleation point during rolling cooling. In the tensile test, the stress concentration was generated at the non-metallic inclusion of the sample, resulting in the delamination fracture of the steel plate, which reduced the elongation after fracture.
  • [1]
    马静超, 张琦.低合金中厚板延伸率不合格原因及分析[J].宽厚板,2020,26(5):36-40.
    [2]
    孙齐松,王新华,王国连.中厚板延伸率不合格试样断裂机理研究[J].物理测试,2007,25(1):5-9.
    [3]
    刘卫航.Q235B钢板断后伸长率不合格原因分析[J].理化检验(物理分册),2018,54(9):701-704.
    [4]
    汤海芳,王豹,郑翠军,等.Q345R钢板断后伸长率不合格原因分析[J].理化检验(物理分册),2016,52(4):287-290.
    [5]
    刘士旺,刘强,王文韶.Q235B中厚板伸长率不合格原因分析[J].物理测试,2016,34(1):10-13.
    [6]
    王尖锐.转炉出钢温度控制技术的研究与实践[J].世界钢铁,2013,13(4):46-49.
    [7]
    李艳梅,朱伏先,崔凤平,等.中厚钢板分层缺陷的形成机制分析[J].东北大学学报(自然科学版),2007,28(7):1002-1005.
    [8]
    潘咏忠,廖明,肖彪,等.中厚板延伸率不合格原因分析[J].重钢技术,2013(2):14-19.

Catalog

    Article views (7) PDF downloads (8) Cited by()

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return