The present invention relates to a method for preventing cavitation erosion of a stainless steel propeller, the method comprising the steps of: determining a target portion (30) wider than an expected eroded portion (20) on a propeller (10); having raw materials go through stamp forging and rough machining to form the target portion (30) on the propeller (10); and overlay-welding a material having erosion resistance higher than that of stainless steel onto the target portion (30). Since a metal having high erosion resistance is overlay welded to the propeller of an icebreaker for polar expeditions, it is possible to secure cavitation erosion resistance against extreme conditions and thus improve its durability.

    본 발명은 스테인레스강 프로펠러의 캐비테이션으로 유발되는 침식을 방지하는 방법에 있어서: (A) 해당 프로펠러(10)에서 예상된 침식부(20)보다 넓은 대상부(30)를 결정하는 단계; (B) 원재료의 형단조와 황삭 가공을 거쳐 상기 프로펠러(10)에 대상부(30)를 형성하는 단계; 및 (C) 스테인레스강에 비하여 높은 내침식성을 지닌 소재를 대상부(30) 상에 육성 용접으로 형성하는 단계;를 포함하여 이루어지는 것을 특징으로 한다. 이에 따라, 극지운항용 쇄빙 선박에서 침식이 주요하게 발생하는 프로펠러 부위에 내침식성이 우수한 금속으로 육성 용접을 실시하여 극한 조건에 대응한 캐비테이션 침석 저항성과 내구성을 확보하는 효과가 있다.


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    Title :

    Method for preventing cavitation erosion of stainless steel propeller


    Additional title:

    스테인레스강 프로펠러 캐비테이션 침식 방지방법


    Contributors:
    JEONG NAK SHIN (author) / WOO IL GUK (author)

    Publication date :

    2018-06-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B23P Sonstige Metallbearbeitung , OTHER WORKING OF METAL / B23K Löten , SOLDERING OR UNSOLDERING / B24B MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING , Maschinen, Einrichtungen oder Verfahren zum Schleifen oder Polieren / B33Y ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING , Additive (generative) Fertigung, d. h. die Herstellung von dreidimensionalen [3D] Bauteilen durch additive Abscheidung, additive Agglomeration oder additive Schichtung, z. B. durch 3D- Drucken, Stereolithografie oder selektives Lasersintern / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING



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