摘要:
The pipe structure for an exhaust system of an internal combustion engine comprises an outer pipe (1) comprising a cylindrical section having a first end (13) and a second end (14), and an inner pipe (2) that is arranged coaxially inside the outer pipe (1) so that an empty space (5) is formed between the outer pipe (1) and the inner pipe (2). The inner pipe (2) comprises an outward projection (6,12) for engaging the inner pipe (2) with a radial projection (3,11,18) of the outer pipe (1).
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。