摘要:
A welding joint comprises a pair of steel materials, and a welding metal that is formed with a high-energy density beam at a butt welding portion between the pair of steel materials, wherein a transformation starting temperature Ms that is calculated by a following formula: Ms(° C.)=371−353C−22Si−24.3Mn−7.7Cu−17.3Ni−17.7Cr−25.8Mo, using a composition of mass % of the welding metal is 250° C. or less.
摘要:
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 side of a first surface of the butt-welded joint to a side of a second surface opposite the first surface by irradiation of a first high-energy density beam from the side of the first surface, 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 weld metal at the side of the first surface side of the first weld metal. 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 an equation 1.2≦W2/W1≦3.5, and a depth of the second weld metal from the first surface is 2.0 mm to 10.0 mm.
摘要:
A steel for electron-beam welding according to the present invention includes at least C: 0.02% to 0.10%, Si: 0.03% to 0.30%, Mn: 1.5% to 2.5%, Ti: 0.005% to 0.015%, N: 0.0020% to 0.0060%, and O: 0.0010% to 0.0035%, further includes S: limited to 0.010% or less, P: limited to 0.015% or less, and Al: limited to 0.004% or less, with a balance including iron and inevitable impurities. An index value CeEBB obtained by substituting composition of the steel into following Formula 1 falls in the range of 0.42 to 0.65%, the number of oxide having an equivalent circle diameter of 1.0 μm or more is 20 pieces/mm2 or less at a thickness center portion in cross section along the thickness direction of the steel, and the number of oxide containing Ti of 10% or more and having an equivalent circle diameter of not less than 0.05 μm or more and less than 0.5 μm falls in the range of 1×103 to 1×105 pieces/mm2 at the thickness center portion. CeEBB=C+¼Mn+ 1/15Cu+ 1/15Ni+⅕Cr+⅕Mo+⅕V (Formula 1)
摘要:
A welding joint comprises a pair of steel materials, and a welding metal that is formed with a high-energy density beam at a butt welding portion between the pair of steel materials, wherein a transformation starting temperature Ms that is calculated by a following formula: Ms(° C.)=371−353C−22Si−24.3Mn−7.7Cu−17.3Ni−17.7Cr−25.8Mo, using a composition of mass % of the welding metal is 250° C. or less.
摘要:
An electron-beam welded joint including, by mass %, C: 0.02% to 0.1%, Si: 0.03% to 0.30%, Mn: 1.5% to 2.5%, Ti: 0.005 to 0.015%, N: 0.0020 to 0.0060%, O: 0.0010% to 0.0035%, Nb: 0% to 0.020%, V: 0% to 0.030%, Cr: 0% to 0.50%, Mo: 0% to 0.50%, Cu: 0% to 0.25%, Ni: 0% to 0.50%, B: 0% to 0.0030%, S: limited to 0.010% or less, P: limited to 0.015% or less, Al: limited to 0.004% or less, and a balance consisting of iron and unavoidable impurities, wherein an index value CeEB is 0.49% to 0.60%, a number of oxides having an equivalent circle diameter of 1.0 μm or more is 20 pieces/mm2 or less, and a number of oxides having an equivalent circle diameter of 0.05 μm or more and less than 0.5 μm is 1×103 pieces/mm2 to 1×105 pieces/mm2 at a thickness center portion.
摘要翻译:1.一种电子束焊接接头,以质量%计含有C:0.02〜0.1%,Si:0.03〜0.30%,Mn:1.5〜2.5%,Ti:0.005〜0.015%,N:0.0020〜0.0060% O:0.0010〜0.0035%,Nb:0〜0.020%,V:0%〜0.030%,Cr:0〜0.50%,Mo:0〜0.50%,Cu:0〜0.25% 0%〜0.50%,B:0%〜0.0030%,S:限制在0.010%以下,P:0.015%以下,Al:0.004%以下,余量由铁和不可避免的杂质 其中,指数值CeEB为0.49〜0.60%,当量圆直径为1.0μm以上的氧化物数为20个/ mm 2以下,当量圆直径为0.05μm以上的氧化物数 在厚度中心部分,小于0.5μm为1×103个/ mm 2〜1×105个/ mm 2。
摘要:
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)
摘要:
To form a welded joint having a sufficiently high fracture toughness value δc by butting welding high strength steel plates having a yield strength of the 355 MPa class or more and a plate thickness of over 50 mm by electron beam welding, the butt welded joint is made one where the hardness of the weld metal is 110% to 220% of the hardness of the base material and where the width of the weld metal is 20% A or less of the base material plate thickness.
摘要:
An electron-beam welded joint including, by mass %, C: 0.02% to 0.1%, Si: 0.03% to 0.30%, Mn: 1.5% to 2.5%, Ti: 0.005 to 0.015%, N: 0.0020 to 0.0060%, O: 0.0010% to 0.0035%, Nb: 0% to 0.020%, V: 0% to 0.030%, Cr: 0% to 0.50%, Mo: 0% to 0.50%, Cu: 0% to 0.25%, Ni: 0% to 0.50%, B: 0% to 0.0030%, S: limited to 0.010% or less, P: limited to 0.015% or less, Al: limited to 0.004% or less, and a balance consisting of iron and unavoidable impurities, wherein an index value CeEB is 0.49% to 0.60%, a number of oxides having an equivalent circle diameter of 1.0 μm or more is 20 pieces/mm2 or less, and a number of oxides having an equivalent circle diameter of 0.05 μm or more and less than 0.5 μm is 1×103 pieces/mm2 to 1×105 pieces/mm2 at a thickness center portion.
摘要翻译:1.一种电子束焊接接头,以质量%计含有C:0.02〜0.1%,Si:0.03〜0.30%,Mn:1.5〜2.5%,Ti:0.005〜0.015%,N:0.0020〜0.0060% O:0.0010〜0.0035%,Nb:0〜0.020%,V:0%〜0.030%,Cr:0〜0.50%,Mo:0〜0.50%,Cu:0〜0.25% 0%〜0.50%,B:0%〜0.0030%,S:限制在0.010%以下,P:0.015%以下,Al:0.004%以下,余量由铁和不可避免的杂质 其中,指数值CeEB为0.49〜0.60%,当量圆直径为1.0μm以上的氧化物数为20个/ mm 2以下,当量圆直径为0.05μm以上的氧化物数 在厚度中心部分,小于0.5μm为1×103个/ mm 2〜1×105个/ mm 2。
摘要:
A butt-welded joint of a welded structure which includes a pair of target metals; a weld bead formed by irradiating a high-energy density beam to a butt portion between the pair of the target metals and has a width W on the irradiated side surface; and a pair of altered zones consisting of heat-affected zones formed by irradiating another high-energy density beam to both sides of the center of the weld bead in the weld bead width direction such that the pair of the altered zones are located on respective sides of the center of the weld bead and each has a band shape extending in the weld bead length direction and a method for manufacturing the butt-welded joint of the welded structure.
摘要:
The present invention provides a butt-welded joint of a welded structure, including: a pair of target metals; a weld bead formed by irradiating a first high-energy density beam to a butt portion between the pair of the target metals, the weld bead having a width W on an irradiated side surface; and a pair of altered zones formed, on a surface of the butt-welded joint having the first high-energy density beam irradiated thereto, by irradiating a second high-energy density beam to the surface, the pair of the altered zones having a band shape extending in parallel to the weld bead, and the pair of the altered zones consisting of a pair of heat-affected portions and molten and solidified metals located on a right side and a left side relative to the center of the weld bead in the width direction.