LOW-CARBON IRON-BASED ALLOY USEFUL FOR VALVE SEAT INSERTS

    公开(公告)号:EP4123048A1

    公开(公告)日:2023-01-25

    申请号:EP22183028.4

    申请日:2022-07-05

    Inventor: QIAO, Cong Yue

    Abstract: A low-carbon iron-chromium-molybdenum alloy comprises, in weight percent: carbon from about 0.1 to about 0.8 percent; manganese from about 0.1 to about 4 percent; silicon from about 0.1 to about 0.5 percent; chromium from 14 to about 16 percent; nickel up to about 8 percent; vanadium up to about 0.1 percent; molybdenum from 14 to about 16 percent; tungsten up to about 6 percent; niobium from about 0.1 to about 0.8 percent; cobalt up to about 0.2 percent; boron up to 0.1 percent; nitrogen up to about 0.1 percent; copper up to about 1.5 percent; sulfur up to about 0.05 percent; phosphorus up to about 0.05 percent; balance iron from about 50 to about 65 percent; and incidental impurities wherein the alloy contains a ratio of Cr/Mo of about 0.9 to about 1.1. The alloy can be used as a valve seat insert for combustion engines.

    ACIER INOXYDABLE DUR PARAMAGNETIQUE ET SON PROCEDE DE FABRICATION

    公开(公告)号:EP3995600A1

    公开(公告)日:2022-05-11

    申请号:EP20206523.1

    申请日:2020-11-09

    Inventor: PORRET, Joël

    Abstract: La présente invention se rapporte à un acier inoxydable paramagnétique avec une composition chimique comprenant en poids :
    - 20 ≤ Cr ≤ 40%,
    - 3 ≤ Ni ≤ 20%,
    - 0 ≤ Mn ≤ 15%,
    - 0 ≤ Al ≤ 5%,
    - 3
    - 0 ≤ W ≤ 5%,
    - 0 ≤ Cu ≤ 2%,
    - 0 ≤ Si ≤ 5%,
    - 0 ≤ Ti ≤ 1%,
    - 0 ≤ Nb ≤ 1%,
    - 0 ≤ C ≤ 0.1%,
    - 0 ≤ N ≤ 0.5%,
    - 0 ≤ S ≤ 0.5%,
    - 0 ≤ P ≤ 0.1%,
    le solde étant constitué par du fer et des impuretés éventuelles ayant chacune une teneur inférieure ou égale à 0.5%,
    ledit acier ayant une dureté comprise entre 575 et 900 HV10.
    Elle se rapporte également à une pièce notamment un composant horloger réalisé dans cet acier et au procédé de fabrication de la pièce.

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