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US 2024/0198447 A1Published application
Arc welded joint and arc welding method
AssigneeJfe Steel Corporation
InventorsKyohei KONISHI, Hiroshi MATSUDA, Koichi TANIGUCHI
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Abstract
An arc welded joint and an arc welding method. The arc welded joint has a weld formed by arc welding of an overlap of at least two steel sheets. A slag-covered area ratio is 20% or less. A Vickers hardness of a weld metal and a Vickers hardness of softened portions of a weld heat affected zone in the weld satisfy a specified relationship.
Claims19
An arc welded joint having a weld formed by arc welding of an overlap of at least two steel sheets,
- wherein a slag-covered area ratio SRATIO (%) represented by formula (1) is 20% or less:
- SRATIO=100×SSLAGSBEAD (1)
- where SBEAD is a bead surface area (mm2) of a weld bead in the weld, and SSLAG is part of the bead surface area SBEAD and is a slag surface area (mm2) of a region covered with a slag, and
- a Vickers hardness of a weld metal and a Vickers hardness of softened portions of a weld heat affected zone in the weld satisfy the following relationships;
- Hmax≤550, and
- Hmin≥1.07×HHAZ
- where Hmax is a maximum value of the Vickers hardness of the weld metal, Hmin is a minimum value of the Vickers hardness of the weld metal, and HHAZ is an average value of the Vickers hardness of the softened portions of the weld heat affected zone.
4 more elements
(canceled)
Dependencies are inferred from the claim text.