PROBLEM TO BE SOLVED: To provide a crawler bearing bush capable of extending the life thereof and to provide a manufacturing method therefor.SOLUTION: A crawler bearing bush 40 has an annular shape including an inner peripheral surface 41, an outer peripheral surface 42, a first end face 43, and a second end face 44 located opposite the first end face 43 in an axial direction. The crawler bearing bush 40 comprises: an inner-peripheral-surface-side hard layer 41A formed including the inner peripheral surface 41; an outer-peripheral-surface-side hard layer 42A formed including the outer peripheral surface 42; a first-end-face-side hard layer 43A formed including the first end face 43 and having a thickness of 3 mm or greater from the first end face 43 of an area having a hardness of 63HRC or greater; and a non-hard area 49 lower in hardness than the inner-peripheral-surface-side hard layer 41A, outer-peripheral-surface-side hard layer 42A, and first-end-face-side hard layer 43A. The crawler bearing bush is made of steel.SELECTED DRAWING: Figure 5

    【課題】その寿命を延ばすことが可能な履帯用軸受ブシュおよびその製造方法を提供する。【解決手段】履帯用軸受ブシュ40は、内周面41と、外周面42と、第1端面43と、軸方向において第1端面43とは反対側に位置する第2端面44と、を含む円環状の形状を有する。履帯用軸受ブシュ40は、内周面41を含むように形成される内周面側硬化層41Aと、外周面42を含むように形成される外周面側硬化層42Aと、第1端面43を含むように形成され、63HRC以上の硬度を有する領域の第1端面43からの厚みが3mm以上である第1端面側硬化層43Aと、内周面側硬化層41A、外周面側硬化層42Aおよび第1端面側硬化層43Aよりも硬度が低い非硬化領域49と、を備え、鋼からなる。【選択図】図5


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    Title :

    CRAWLER BEARING BUSH AND MANUFACTURING METHOD THEREFOR


    Additional title:

    履帯用軸受ブシュおよびその製造方法


    Contributors:
    KONDO YUSUKE (author) / MAEDA KAZUO (author) / AMADA EIJI (author)

    Publication date :

    2018-07-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / C22C Legierungen , ALLOYS



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