PROBLEM TO BE SOLVED: To provide a manufacturing method of a spring for a suspension device for manufacturing the spring for the suspension device having good mechanical strength and toughness in a compact production line with high productivity, and the spring for the suspension device manufactured by the manufacturing method.SOLUTION: There is provided a manufacturing method of a spring for a suspension device including: a forming process S10 for forming a steel material containing, by mass%, C:0.10 to 0.39%, Mn:1.00 to 1.50% and B:0.0005 to 0.003% into a spring shape in a hot or cold state; and a hardening process S20 for applying hardening to the formed steel material by a medium having a heat transfer coefficient equal to or close to water, and manufacturing the spring for the suspension device without tempering the hardened steel material to 400°C or more.SELECTED DRAWING: Figure 3

    【課題】良好な機械的強度と靭性とを有する懸架装置用ばねを、コンパクトな生産ラインで生産性高く製造する懸架装置用ばねの製造方法及びその製造方法により製造される懸架装置用ばねの提供。【解決手段】質量%で、C:0.10〜0.39%、Mn:1.00〜1.50%、B:0.0005〜0.003%を含む鋼材を熱間又は冷間においてばね形状に成形する成形工程S10と、成形された前記鋼材に水と同等以上又は水に近い熱伝達率を有する媒体による焼入れを施す焼入れ工程S20とを含み、焼入れが施された前記鋼材を400℃以上に焼戻すこと無く懸架装置用ばねを製造する懸架装置用ばねの製造方法。【選択図】図3


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    Title :

    MANUFACTURING METHOD OF SPRING FOR SUSPENSION DEVICE AND SPRING FOR SUSPENSION DEVICE


    Additional title:

    懸架装置用ばねの製造方法及び懸架装置用ばね


    Contributors:

    Publication date :

    2016-11-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge / C22C Legierungen , ALLOYS / F16F SPRINGS , Federn



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