Effect of boron addition on the toughness and the microstructure of high strength linepipe seam weld metal(Materials, Metallurgy & Weldability)

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概要

• 論文の詳細を見る

• The effect of boron addition on the toughness and microstructure of seam weld metal was investigated in tensile strength range from 700 to 1100MPa. Two types of weld metal were produced in this study. Type A weld metal was produced with boron added through the flux. Type B weld metal was produced by boron free flux. In the tensile strength range less than 800MPa, type B weld metal showed lower absorbed energies than type A because of grain boundary ferrite formation. In the tensile strength range of 800MPa or more, type B weld metal showed greater absorbed energies than type A. In this tensile strength range, some acicular ferrite is replaced with bainite or bainite/martensite and the absorbed energy decreases with increasing tensile strength. The type B weld metal had more acicular ferrite and greater absorbed energy than type A in this tensile strength range.

• 大阪大学の論文

著者

• Komizo Yu-ichi

  Osaka University

• Hamada Masahiko

  Corporate R&d Lab. Sumitomo Metal Industries

• OKAGUCHI Shuji

  Corporate R&D lab., Sumitomo metal industries

• Okaguchi Shuji

  Corporate R&d Lab. Sumitomo Metal Industries

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• Nucleation of Bainite at Small Angle Dislocation Network in Austenite and Its Effects on Mechanical Properties in Steels
• Effect of boron addition on the toughness and the microstructure of high strength linepipe seam weld metal(Materials, Metallurgy & Weldability)

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