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引言铸品尺寸精密,減少机工加工,为一般机械制造之要求。用压模(Die Cast)及硬模(Permenant Mold)法制造之铸品,均可精确至0.001″-0.05″,減少加工手续,颇合一般要求。但压模及硬模制成之铸品,只能適合于低温合金之铸造,高温合金则因制模材料(Die-Material)与铸造材料熔点(Melting Point)接近,模体易受镕蚀。固然塗加耐火層料(Refractory Coats),可以铸造,但失精密铸造意义,故高温合金之精密铸工,遠非压模及硬模法可以勝任。
INTRODUCTION The precision of cast products reduces the machining process and is a requirement for general machinery manufacturing. The castings made by Die Cast and Permenant Mold methods can be accurate to 0.001′′-0.05′′, reducing the processing procedures, which are quite general requirements. However, the die made of die and hard die can only be suitable for the casting of low-temperature alloys, and the die-material (Die-Material) is close to the melting point of the cast material, and the die body is susceptible to corrosion. Although Refractory Coats can be cast, it can be cast, but it loses the significance of precision casting. Therefore, precision casters for high-temperature alloys are far more suitable than die-casting and hard-molding methods.