A SPHEROIDAL GRAPHITE IRON FOR CYLINDER HEADS AND METHOD FOR MANUFACTURING IT
    5.
    发明公开
    A SPHEROIDAL GRAPHITE IRON FOR CYLINDER HEADS AND METHOD FOR MANUFACTURING IT 有权
    球铸铁及其制造缸盖和方法

    公开(公告)号:EP3099834A1

    公开(公告)日:2016-12-07

    申请号:EP15702298.9

    申请日:2015-01-26

    摘要: A spheroidal graphite iron for cylinder head of an internal combustion engine, the spheroidal graphite iron having a tensile strength in the range 350 – 480 Mpa and a thermal conductivity in the range 38 – 45 W/(K*m), and the composition in percentage by weight: 3,0 to 4,5% of carbon (C ), 0,9 to 1.75% silicon (Si), less than 0,8% manganese (Mn), less than 0,3% copper (Cu), 0,03 to 0,25% Vanadium (V), and 0,01 to 0,1% niobium (Nb), the rest being iron (Fe) and unavoidable impurities. The spheroidal graphite iron comprises a microstructure of at least 75 vol-% ferritic, which is precipitation hardened.

    摘要翻译: 甲球墨铸铁用于内燃发动机的气缸盖,其具有范围为350至480兆帕的拉伸强度和在所述范围内的热导率38球墨铸铁 - 45 W /(K * M),并且在组合物中 百分比以重量计:3.0〜4.5%的碳(C)的,0.9〜1.75%的硅(Si),小于0.8%的锰(Mn),小于0.3%的铜(Cu) 为0.03〜0.25%的钒(V),和0.01〜0.1%铌(Nb),其余为铁(Fe)和不可避免的杂质。 的球墨铸铁包括至少75%的显微组织由铁素体体积,所有的其析出硬化。