Butt-welded joint and method for manufacturing same
AssigneeNippon Steel & Sumitomo Metal Corporation
InventorsRyuichi Honma, Tadashi Ishikawa
Life of this patent
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Abstract
A butt-welded joint includes a pair of steel plates, a first weld metal that is formed at a butting portion of the pair of steel plates from a first surface side of the pair of steel plates to a second surface side opposite the first surface side by irradiation of a first high-energy density beam from the first surface side, and a second weld metal that is formed by a second high-energy density beam to cover an end surface of the first surface side of the first weld metal. Here, a width W1 of the first weld metal on the first surface and a width W2 of the second weld metal on the first surface satisfy a following equation (1), and a depth from the first surface of the second weld metal is 2.0 mm to 10.0 mm. 1.2≦W2/W1≦3.5 (1)
Claims16
A butt-welded joint, comprising:
- a pair of steel plates;
- a first weld metal that is formed at a butting portion of the pair of steel plates, from a first surface side of the pair of steel plates to a second surface side opposite the first surface side by irradiation of a first high-energy density beam from the first surface side;
- and
- a second weld metal that is formed by irradiation of a second high-energy density beam to cover an end surface of the first surface side of the first weld metal,
- wherein a width W1 of the first weld metal on the first surface and a width W2 of the second weld metal on the first surface satisfy a following equation (1), and a depth from the first surface of the second weld metal is 2.0 mm to 10.0 mm.
- 1.2≦W2/W1≦3.5 (1)
A manufacturing method of a butt-welded joint, comprising:
- irradiating a butting portion of a pair of steel plates with a first high-energy density beam to form a first weld metal with a width W1 on a first surface that is in an irradiation side of the first high-energy density beam of the pair of steel plates;
- and irradiating the first weld metal with a second high-energy density beam having an energy density lower than that of the first high-energy density beam to form a second weld metal with a width W2 on the first surface of the steel plate,
- wherein the width W1 and the width W2 satisfy a following equation (3), and a depth from the first surface of the second weld metal is 2.0 mm to 10.0 mm
- 1.2≦W2/W1≦3.5 (3)
Dependencies are inferred from the claim text.