【摘要】 采用低熔点、易扩散的孕育剂，改善制冷压缩机铸件的硬度和组织的均匀性，消除硬质点，从而有效地改善了加工性能．更多还原

【Abstract】 The use of low melting point and easy diffusion inoculant improved the hardness and structure uniformity of the castings for refrigerating compressor and eliminated the hard spots. As a result,the machinability of the castings was obviously improved更多还原