본 발명은 탄소(C), 실리콘(Si), 망간(Mn), 니켈(Ni), 크롬(Cr) 및 마그네슘(Mg)을 각각 특정 함량 범위로 조절하되, 니켈 당량이 특정 범위가 되도록 제어한 화학 조성을 갖는 구상 흑연 주철, 및 이로 이루어진 엔진 배기계 부품에 대한 것이다.

    The present invention relates to a spheroidal graphite cast iron and an engine exhaust system component formed from the same, the spheroidal graphite cast iron comprising, based on the total weight, 2.5 to 3.0 wt% of carbon (C), 4.1 to 5.5 wt% of silicon (Si), 0.8 to 1.0 wt% of manganese (Mn), 21.0 to 25.0 wt% of nickel (Ni), 1.4 to 1.6 wt% of chromium (Cr), 0.03 to 0.10 wt% of magnesium (Mg), and a remainder of iron (Fe) for satisfying 100 wt%, the nickel equivalent Nieq being in the range of 24 to 30. The spheroidal graphite cast iron not only has excellent castability, fluidity, mechanical properties at normal temperature and high temperature, phase stability and heat resistance at different temperatures, but also has excellent cost competitiveness. Thus, the present invention can manufacture in an economical manner engine exhaust system components exposed to exhaust gas of about 810 DEG C or more.


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    Title :

    SPEROIDAL GRAPHITE CAST-IRON AND ENGINE EXHAUST SYSTEM COMPONENTS THEREFROM


    Additional title:

    구상 흑연 주철 및 이로 이루어진 엔진 배기계 부품


    Contributors:
    OH JEONGHYEOK (author) / CHUNG JONGKWON (author) / JUNG KIHWAN (author) / KIM JUNGYEUP (author) / KIM SANGMOK (author)

    Publication date :

    2022-02-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    C22C Legierungen , ALLOYS / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS



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