SPHEROIDAL GRAPHITE CAST IRON FOR AN ENGINE EXHAUST SYSTEM

摘要

A spheroidal graphite cast iron for a component of an engine exhaust system includes carbon ranging from about 3.0 wt % to about 3.4 wt %, silicon ranging from about 4.2 wt % to about 4.5 wt %, manganese ranging from about 0.1 wt % to about 0.3 wt %, sulfur ranging from about 0.002 wt % to about 0.01 wt %, phosphorous in a range equal to or less than about 0.05 wt %, magnesium ranging from about 0.035 wt % to about 0.055 wt %, molybdenum ranging from about 0.9 wt % to about 1.2 wt %, nickel ranging from about 0.2 wt % to about 0.5 wt %, vanadium ranging from about 0.4 wt % to about 0.6 wt %, niobium ranging from about 0.1 wt % to about 0.4 wt %, cerium ranging from about 0.005 wt % to about 0.01 wt %, aluminum ranging from about 0.003 wt % to about 0.007 wt %, and a remainder of iron.

主权项

1. A spheroidal graphite cast iron for a component of an engine exhaust system, comprising:
carbon (C) in a range from about 3.0 weight percent to about 3.4 weight percent, silicon (Si) in a range from about 4.2 weight percent to about 4.5 weight percent, manganese (Mn) in a range from about 0.1 weight percent to about 0.3 weight percent, sulfur (S) in a range from about 0.002 weight percent to about 0.01 weight percent, phosphorous (P) in a range equal to or less than about 0.05 weight percent, magnesium (Mg) in a range from about 0.035 weight percent to about 0.055 weight percent, molybdenum (Mo) in a range from about 0.9 weight percent to about 1.2 weight percent, vanadium (V) in a range from about 0.4 weight percent to about 0.6 weight percent, niobium (Nb) in a range from about 0.1 weight percent to about 0.4 weight percent, nickel (Ni), aluminum (Al) and a remainder of iron (Fe), based on a total weight of the spheroidal graphite cast iron, wherein a content ratio of the nickel and the aluminum (Ni/Al) is in a range from about 29 to about 166.