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WU Yidang, ZHANG Bin, YANG Zhipeng, QIAO Mu, ZHANG Maolong. Fracture behavior analysis of inclusions in large forgings of SA508.Gr3 low alloy steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(5): 54-59. DOI: 10.12073/j.hjxb.2019400127
Citation: WU Yidang, ZHANG Bin, YANG Zhipeng, QIAO Mu, ZHANG Maolong. Fracture behavior analysis of inclusions in large forgings of SA508.Gr3 low alloy steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(5): 54-59. DOI: 10.12073/j.hjxb.2019400127
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Fracture behavior analysis of inclusions in large forgings of SA508.Gr3 low alloy steel

  • 1.

    China Nuclear Power Engineering Co., Ltd., Shenzhen 518124, China

  • 2.

    Shanghai Electric Nuclear Power Equipment Co., Ltd., Shanghai 201306, China

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  • Received Date: December 12, 2017
    Graphical Abstract
    • Abstract
  • The fracture behavior of inclusions in large SA508.Gr3 low alloy steel forgings under welding thermal cycling was studied by simulating tensile test. The results show that the large SA508.Gr3 low alloy steel forgings with circular notches still have good plastic deformation ability under welding thermal cycling conditions, and more than 20% elongation is obtained. Cracks are not easy to occur in high temperature tension. When the micro-metallurgy in the forging base metal has sharp angle and the inclusions exceed the critical size, the base metal will have 0.2% strain loss under thermal cycling, and the cracks are easy to induce at the sharp angle area. In actual production, it is necessary to eliminate the deficiency of sharp angle exceeding critical size in base metal.
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