| 摘要 |
PURPOSE: Molybdenum is omitted, and copper and chrome are reinforced to prevent contraction defect and to improve durability as well as to guarantee even product quality. A composition of carbon of 3.3-3.5 weight%, copper of 0.5-0.7 weight%, chrome of 0.3-0.5 weight% are provided for a diesel engine head. CONSTITUTION: A composition of diesel head comprises carbon of 3.3-3.5 weight%, copper of 0.5-0.7 weight%, chrome of 0.3-0.5 weight%. The composition comprises silicon, phosphorus, sulfur, nickel, tin, manganese additionally.
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