铬在铸铁中有三个主要用途:生成碳化物,使之具有耐腐蚀性,使组织保持稳定以便于高温使用。通常加入少量的铬,以稳定灰铸铁中的珠光体,控制冷硬铸铁中的白口深度,或在含硅量少于1%的白口铸铁中保证获得一种无石墨的组织。 There are three major uses of chromium in cast iron: carbide formation, corrosion resistance, and stability of the structure for high temperatures. A small amount of chromium is usually added to stabilize pearlite in gray cast iron, to control the white depth in chilled cast iron, or to obtain a graphite-free structure in white cast iron containing less than 1% silicon.