High strength steel (600-900 MPa) deposited metals: microstructure and mechanical properties

被引：29
作者：
Zhang, T. [1 ,2 ,3 ]
Li, Z. [2 ]
Ma, S. [2 ]
Kou, S. [3 ]
Jing, H. [1 ]
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China
[2] Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
[3] Univ Wisconsin, Dept Mat Sci & Engn, 1509 Univ Ave, Madison, WI 53706 USA
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2016年 / 21卷 / 03期
基金：
中国国家自然科学基金; 北京市自然科学基金;
关键词：
Ultralow carbon bainitic steels; Metal cored wires; Deposited metals; Microstructure; Mechanical properties; HEAT-AFFECTED ZONE; ACICULAR FERRITE; BAINITIC MICROSTRUCTURES; INCLUSIONS; TOUGHNESS;
D O I：
10.1179/1362171815Y.0000000079
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and mechanical properties of the deposited metals of five metal cored wires for welding 600-900 MPa ultralow carbon bainitic steels were investigated. It was found that lowering the C content and optimising the Mn, Ni, Mo and Cr contents of the deposited metal significantly improved the strength and toughness. At the lowest strength level (627 MPa), ferrite dominated, mainly acicular ferrite and proeutectoid ferrite. However, at the highest strength level (>800 MPa), bainite dominated, mainly degenerate upper bainite and granular bainite. Good strength toughness match was achieved by a deposited metal having an interlaced multiphase microstructure with degenerate upper bainite and martensite acting as main strengthening phases, and granular bainite and acicular ferrite acting as toughening phases.
引用
收藏
页码：186 / 193
页数：8
相关论文
共 25 条
  • [1] [Anonymous], B40 AWS
  • [2] [Anonymous], 1991, 13298 GBT
  • [3] AWS A5.28/A5.28M, 2005, A528A528M AWS
  • [4] Bhadeshia H., 2001, Bainite in Steels: Transformation, Microstructure and Properties
  • [5] Easterling K., 1992, INTRO PHYS METALLURG
  • [6] Fairchild D., 2005, P 7 INT C TRENDS WEL, P749
  • [7] Ito Y., 1968, J Jpn Weld Soc, V37, P983, DOI [DOI 10.2207/QJJWS1943.37.983, 10.2207/qjjws1943.37.983]
  • [8] Three-dimensional characterization of bainitic microstructures in low-carbon high-strength low-alloy steel studied by electron backscatter diffraction
    Kang, J. S.
    Seol, Jae-Bok
    Park, C. G.
    [J]. MATERIALS CHARACTERIZATION, 2013, 79 : 110 - 121
  • [9] Kou S., 2003, WELDING METALLURGY, P431
  • [10] Austenite to bainite phase transformation in the heat-affected zone of a high strength low alloy steel
    Lambert-Perlade, A
    Gourgues, AF
    Pineau, A
    [J]. ACTA MATERIALIA, 2004, 52 (08) : 2337 - 2348
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