Soft nitriding cam shaft

Abstract

PURPOSE:To improve durability, to reduce the generation of distorsion and to improve the reliability of quality by forming a cam portion and a journal portion by solid casting using soft nitriding steel material having a specified composition, machining same and applying soft nitriding treatment to same. CONSTITUTION:A cam shaft 8 has a cam portion 9 and a journal portion 10 which are formed by solid casting. In this case, the cam portion 9 and the journal portion 10 are formed by solid casting using soft nitriding steel material set in such a manner that C: 0.1-0.6%, Cr: 0.05-2. 5%, Al : 0.2%max, V: 0.03-0.25%, Mo: 0.25% or less). Thus both a cam surface and a rotary shaft are excellent in wear-resistance, seizure-resistance and pitching resistance, and the generation of distorsion after soft nitriding treatment can be reduced so as to obtain stable quality.

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Patent Citations (2)

    Publication numberPublication dateAssigneeTitle
    JP-S5722839-AFebruary 05, 1982Mitsubishi Heavy Ind LtdManufacture of crankshaft and camshaft
    JP-S5950158-AMarch 23, 1984Sanyo Tokushu Seikou KkSoft-nitriding low alloy steel

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Cited By (3)

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    EP-2653671-A4April 06, 2016Kawasaki Heavy Ind LtdDrive cam and valve operating device for engine
    JP-5898092-B2April 06, 2016川崎重工業株式会社駆動カム、その製造方法、及びエンジンの動弁装置
    WO-2012081198-A1June 21, 2012川崎重工業株式会社Came de commande à coeur et dispositif d'actionnement de soupape pour moteur