硅与铜对G32气缸盖组织和力学性能的影响

Effect of Si and Cu on Microstructure and Mechanical Properties of G32 Cylinder Head

采用球墨铸铁制造G32气缸盖。从化学成分中硅与铜两元素着手，试验两元素在不同含量时对G32气缸盖组织和力学性能的影响；结果表明：要使G32气缸盖满足材质QT500—7的力学性能，同时具有良好的耐压性能，应选择硅铜含量分别为：2．50％-2．65％，0．45％-0．55％。

The microstructure and mechnical properties of G32 with different Si and Cu contents were studied. The experimential results showed G32 cylinder head was made of ductile cast iron with 2.50%-2.65%（wt）Si and 0.45%-0.55%（wt）Cu contents to meet mechanical properties of QT500-7 and have good pressure-proof property.