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    Process for manufacturing high-strength parts of an automobile transmission system
    1.
    发明授权
    Process for manufacturing high-strength parts of an automobile transmission system 失效
    制造汽车传动系统的高强度部件的方法

    公开(公告)号：US5098489A

    公开(公告)日：1992-03-24

    申请号：US540127

    申请日：1990-06-19

    申请人： Tsunahiro Yamakawa ,  Satoru Nito ,  Hiroyoshi Yamakawa ,  Ichiro Kokubo ,  Takuo Hosoda ,  Masakatsu Hata

    发明人： Tsunahiro Yamakawa ,  Satoru Nito ,  Hiroyoshi Yamakawa ,  Ichiro Kokubo ,  Takuo Hosoda ,  Masakatsu Hata

    IPC分类号： C21D8/00 ,  C21D6/02 ,  C21D8/02 ,  C22C38/00 ,  C22C38/08 ,  C22C38/16

    CPC分类号： C21D8/0273 ,  C22C38/08 ,  C22C38/16 ,  C21D6/02 ,  C21D8/0226 ,  C21D8/0236

    摘要： Steel containing, on a weight percent basis, 0.01 to 0.15% of carbon, 0.05 to 0.50% of silicon, 0.20 to 1.0% of manganese, 0.01 to 0.1% of aluminum, 0.3 to 2.0% of copper, 0.1 to 2.0% of nickel, 0.015 to 0.1% of niobium and 0.0005 to 0.0050% of calcium, the balance of its composition being iron and unavoidable impurities, is heated to a temperature of 1100.degree. C. to 1250.degree. C., and hot rolled. The hot-rolled steel is coiled at a temperature of 350.degree. C. to 500.degree. C. to prepare a hot-rolled steel sheet having a tensile strength not exceeding 65 kgf/mm.sup.2. The sheet is cold worked until a working strain of at least 15% is set up. The cold-worked product is heated at a temperature of 400.degree. C. to 550.degree. C. for 0.5 to three hours to yield a part having a tensile strength of at least 80 kgf/mm.sup.2 for an automobile, particularly its automatic transmission system.

    摘要翻译： 以重量百分数计，含有0.01〜0.15％的碳，0.05〜0.50％的硅，0.20〜1.0％的锰，0.01〜0.1％的铝，0.3〜2.0％的铜，0.1〜2.0％的镍 ，0.015〜0.1％的铌和0.0005〜0.0050％的钙，其组成为铁和不可避免的杂质，加热至1100〜1250℃的温度，进行热轧。 将该热轧钢卷绕在350〜500℃的温度下，制作拉伸强度不超过65kgf / mm2的热轧钢板。 片材冷加工直到建立至少15％的工作应变为止。 将冷加工品在400℃〜550℃的温度下加热0.5〜3小时，得到汽车，特别是其自动变速箱系统的拉伸强度为80kgf / mm2以上的部分。

    High strength hot rolled steel sheet for wheel rims
    3.
    发明授权
    High strength hot rolled steel sheet for wheel rims 失效
    轮辋高强度热轧钢板

    公开(公告)号：US4880480A

    公开(公告)日：1989-11-14

    申请号：US87967

    申请日：1987-08-17

    申请人： Ichiro Kokubo ,  Kazuhiko Kourida ,  Shunichi Hashimoto ,  Kazuhiro Mimura ,  Zenichi Shibata

    发明人： Ichiro Kokubo ,  Kazuhiko Kourida ,  Shunichi Hashimoto ,  Kazuhiro Mimura ,  Zenichi Shibata

    IPC分类号： C22C38/14

    CPC分类号： C22C38/14

    摘要： A high strength hot rolled steel sheet for wheel rims contains, by weight, from 0.05 to 0.15% of C, from 0.05 to 0.5% of Si, from 1.0 to 1.6% of Mn, from 0.01 to 0.05% of Al, from 0.005 to 0.025% of Ti and from 15 to 60 ppm of N, with the content of P limited to 0.030% or below and the content of S limited to 0.010% or below, the balance being iron and unavoidable impurities. The steel sheet optionally contains, by weight, from 0.01 to 0.06% of Nb or at least one selected from the group consisting of from 0.0005 to 0.01% of Ca and from 0.005 to 0.1% of rare earth metals.

    摘要翻译： 用于轮缘的高强度热轧钢板包含0.05至0.15％的C，0.05至0.5％的Si，1.0至1.6％的Mn，0.01至0.05％的Al，0.005至 Ti的0.025％，N为15〜60ppm，P含量为0.030％以下，S含量为0.010％以下，余量为铁和不可避免的杂质。 钢板任选地含有0.01-0.06％的Nb或选自0.0005至0.01％的Ca和0.005至0.1％的稀土金属的至少一种。