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    HIGH-STRENGTH WELDED JOINT HAVING IMPROVED HIGH-HEAT-INPUT TOUGHNESS
    1.
    发明公开
    HIGH-STRENGTH WELDED JOINT HAVING IMPROVED HIGH-HEAT-INPUT TOUGHNESS 审中-实审

    公开(公告)号：EP4434669A1

    公开(公告)日：2024-09-25

    申请号：EP22911869.0

    申请日：2022-12-20

    申请人： POSCO Co., Ltd

    发明人： HAN, Kyutae ,  HWANG, Wontaek ,  JEONG, Boyoung

    IPC分类号： B23K35/30 ,  B23K9/16

    CPC分类号： B23K35/30 ,  B23K9/16

    摘要： In the present specification, disclosed is a high-strength welded joint having improved high-heat-input toughness by controlling a microstructure. The high-strength welded joint having improved high-heat-input toughness, according to an embodiment of the present disclosure, may include, in percent by weight (wt%), at least 0.03% but not more than 0.045% of C, at least 1.45% but not more than 1.55% of Mn, at least 0.3% but not more than 0.4% of Si, at least 0.02% but not more than 0.03% of Al, at least 1.55% but not more than 1.70% of Ni, at least 0.05% but not more than 0.07% of Cr, at least 0.05% but not more than 0.08% of Cu, at least 0.14% but not more than 0.2% of Mo, at least 0.06% but not more than 0.07% of Ti, at least 0.004% but not more than 0.005% of Nb, at least 0.035% but not more than 0.05% of O, at least 40 ppm but not more than 180 ppm of N, more than 0 ppm but not more than 80 ppm of P, more than 0 ppm but not more than 90 ppm of S, and the balance being iron (Fe) and other inevitable impurities.

    NICKEL BRAZING MATERIAL HAVING EXCELLENT WET SPREADING PROPERTY
    7.
    发明公开
    NICKEL BRAZING MATERIAL HAVING EXCELLENT WET SPREADING PROPERTY 审中-实审

    公开(公告)号：EP4353857A1

    公开(公告)日：2024-04-17

    申请号：EP22810977.3

    申请日：2022-03-24

    申请人： Fukuda Metal Foil & Powder Co., Ltd.

    发明人： HAMADA, Yukitaka ,  NISHIMURA, Shinichi

    IPC分类号： C22C19/05 ,  B23K35/30

    CPC分类号： B23K35/30 ,  C22C19/05

    摘要： Provided is a nickel brazing filler metal which is capable of brazing and joining various stainless steel members at relatively low temperature, and has excellent corrosion resistance, and is used for brazing of a heat exchanger and the like.
    The nickel brazing filler metal is characterized by having a melting temperature of 1000°C or less, exhibiting excellent Wettability, having corrosion resistance against acid, and containing 8.0 to 19.0 mass% of Cr, 7.0 to 10.5 mass% of P, 0.1 to 1.5 mass% of B, and 2.0 to 8.0 mass% of Cu, wherein a content of Mo is 10.0 mass% or less, a content of Si is 2.5 mass% or less, and the remainders are is Ni and unavoidable impurities. In addition, the nickel brazing filler metal may contain one or more elements selected from the group consisting of Co, Fe and Mn, where the content of Co is 5.0 mass% or less, the content of Fe is 3.0 mass% or less, the content of Mn is 3.0 mass% or less, and the total content of these elements is 8.0 mass% or less.