The cast structures of precision resistor PdW20alloy prepared using three different solidification methods were studied.The scanning electron microscopy and electron probe microanalyses(EPMA) showed that the workability of PdW20 alloys prepared by the special solidification method was improved.By using the method the trans-crystallization structure and microcracks among grain boundary produced from water-cooled copper mold could be suppressed,and at the same time it could avoid the defects of different comp...