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THICK STEEL SHEET HAVING SUPERIOR FATIGUE RESISTANCE PROPERTIES IN DIRECTION OF SHEET THICKNESS METHOD FOR PRODUCING SAME AND FILLET WELDED JOINT USING SAID THICK STEEL SHEET
THICK STEEL SHEET HAVING SUPERIOR FATIGUE RESISTANCE PROPERTIES IN DIRECTION OF SHEET THICKNESS METHOD FOR PRODUCING SAME AND FILLET WELDED JOINT USING SAID THICK STEEL SHEET
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机译：沿厚度方向具有优异耐疲劳性能的厚钢板用上述厚钢板生产相同和角焊缝的方法
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摘要
The present invention provides a post-welded steel sheet excellent in an endothelial fatigue characteristic in a thickness direction suitable for a welded steel structure such as a pressure vessel, a method for producing the same, and a fillet welded joint using the steel sheet. Concretely, the compression residual stress perpendicular to the plate thickness direction is 100 MPa or more, preferably in the range of 1 to 4 mm in the thickness direction from both sides or one side of the rolled surface of the steel sheet, 0.001 to 0.05% of Ti, 0.001 to 0.05% of Nb, and 0.1% or less of Al, in addition to 0.03 to 0.15% of Si, 1.0 to 2.0% of Si and 1.0 to 2.0% of Mn, A steel sheet having a composition containing at least one of Cu, Ni, Cr, Mo, V, W, Zr, Ca and B, a method for producing the same, and a fillet welded joint using the steel sheet.
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