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    AGE-HARDENABLE STEEL, AND METHOD FOR MANUFACTURING COMPONENTS USING AGE-HARDENABLE STEEL
    2.
    发明公开
    AGE-HARDENABLE STEEL, AND METHOD FOR MANUFACTURING COMPONENTS USING AGE-HARDENABLE STEEL 审中-公开
    时效硬化钢及使用时效硬化钢制造元件的方法

    公开(公告)号：EP3272896A1

    公开(公告)日：2018-01-24

    申请号：EP16765035.7

    申请日：2016-03-16

    申请人： Nippon Steel & Sumitomo Metal Corporation ,  DENSO CORPORATION

    发明人： YUYA, Masato ,  TAKASUGA, Motoki ,  MAKINO, Taizo ,  HIGASHIDA, Masashi ,  HASEGAWA, Tatsuya ,  NISHIWAKI, Tadashi ,  MORITA, Kouji ,  ITO, Toshimasa ,  TANIMURA, Yoshiro ,  FUKUOKA, Tomomitsu

    IPC分类号： C22C38/00 ,  C22C38/60 ,  C21D8/00 ,  C21D9/00

    摘要： Age hardenable steel is low in hardness after hot forging, providing a machine part with the desired fatigue strength and yield strength by aging treatment, and high in toughness after aging treatment, comprising C: 0.09 to 0.20%, Si: 0.01 to 0.40%, Mn: 1.5 to 2.5%, S: 0.001 to 0.045%, Cr: over 1.00% to 2.00%, Al: 0.001 to 0.060%, V: 0.22 to 0.55%, N: over 0.0080 to 0.0170%, and a balance of Fe and impurities, where an area rate of bainite structures is 80% or more, an effective V ratio (amount of dissolved V/total amount of V) is 0.9 or more, a P and Ti in the impurities is P: 0.03% or less and Ti: less than 0.005%, and the chemical composition is one where the following F1 is 1.00 or less and the F2 is 0.30 or more: F 1 = C + 0.1 × Si + 0.2 × Mn + 0.15 × Cr + 0.35 × V F 2 = − 4.5 × C + Mn + Cr − 3.5 × V

    摘要翻译： 时效硬化钢在热锻后硬度低，通过时效处理可以提供具有所需疲劳强度和屈服强度的机械部件，并且时效处理后的韧性高，包括C：0.09至0.20％，Si：0.01至0.40％ ，Mn：1.5〜2.5％，S：0.001〜0.045％，Cr：超过1.00％〜2.00％，Al：0.001〜0.060％，V：0.22〜0.55％，N：超过0.0080〜0.0170％ 贝氏体组织的面积率为80％以上，有效V比率（溶解V量/ V总量）为0.9以上的杂质，杂质中的P和Ti为0.03％以下 和Ti：小于0.005％，并且化学组成为以下F1为1.00以下且F2为0.30以上的化学组成：F1 = C + 0.1×Si + 0.2×Mn + 0.15×Cr + 0.35×V F2 = -4.5×C +的Mn + Cr系3.5×V