웹(1)과 플랜지(2)의 맞댐 부분에 보강 부재(10)를 구비한 용접 구조체로 한다. 보강 부재 표면에 웹 단면을 맞대고, 필릿 용접에 의해 웹과 보강 부재를 접합하고, 플랜지 표면과 보강 부재 표면을 중첩하고, 필릿 용접에 의해 보강 부재를 접합한다. 그 때, 필릿 용접 이음매의 이음매 단면에 있어서의 중첩면의 미용착부의 폭과, 보강 부재의 판 폭과 좌우의 필릿 용접부의 다리 길이의 합의 비율 Y(%)와, 공용 온도 T(℃)에 있어서의 보강 부재의 취성 균열 전파 정지 인성(Kca)T(N/㎜3/2)의 관계가 Y(%)≥{6900-Kca}/85를 만족시키도록 조정한다. 이것에 의해, 플랜지로부터 발생한 취성 균열의 전파를 보강 부재에서 저지 내지 정지할 수 있다.

    This welded structure is provided with a doubler member (10) disposed at the abutment of a web (1) and a flange (2). The web end surface is abutted against the doubler member surface, the web and the doubler member are joined by fillet welding; the flange surface and doubler member surface are placed overlapping each other and the doubler member is joined with fillet welding. At that time, the relation between the width, in the joint cross section, of the unwelded portion of the overlapping surface of the fillet welded joint, the ratio Y(%) of the doubler member plate width and the sum of the leg lengths of the left and right fillet welded portions, and the brittle crack arrest toughness (Kca)T(N/mm3/2) of the doubler member at the service temperature (°C) is adjusted to satisfy Y(%) ≧ {6900-Kca}/85. Thusly, it is possible to prevent and stop propagation of brittle cracks occurring from the flange by means of the doubler member.


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    Title :

    WELDED STRUCTURE HAVING EXCELLENT BRITTLE CRACK ARRESTABILITY


    Additional title:

    취성 균열 전파 정지 특성이 우수한 용접 구조체


    Publication date :

    2021-06-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B23K Löten , SOLDERING OR UNSOLDERING / B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS



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