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1·The performance, role, potential value and application ways of heat pipe in light alloy in permanent mold casting were expounded.

初步评估了热管在轻合金永久型铸造中的行为、作用、利用潜力和应用的基本形式。

2·Casting: Expendable mold and permanent mold.

铸造：一次性铸造和永久性铸造。

3·The results show that the copper alloy density by permanent-mold casting attains 99.91% of theory density.

结果表明：经金属型铸造的铜合金密度达到理论密度的99 91%。