鉴于钨系合金白口铸铁组织的复杂性和多样性,本文对各种成分的试样进行了金相、扫描电镜观察,并通过X光衍射、电子探针、显微硬度以及染色腐蚀等分析方法,对钨系铸铁的相组成,碳化物的结构类型及形态进行了研究。试验结果表明,钨系合金白口铸铁在铸造条件下获得的组织为介稳定组织,其碳化物的相结构类型与钨碳比(W/C)有关。当W/C在2以下时,合金中碳化物为M_3C;W/C为2～6时,虽然仍 In view of the complexity and diversity of tungsten alloy white cast iron, metallographic and scanning electron microscopy observations of various compositions were carried out. The X-ray diffraction, electron probe, microhardness and dyeing corrosion analysis Method, the phase composition of tungsten cast iron, carbide structure types and morphology were studied. The experimental results show that the microstructure of tungsten-based alloy white cast iron obtained under casting conditions is metastable and its carbide phase structure type is related to tungsten / carbon ratio (W / C). When W / C is below 2, the carbide in the alloy is M_3C; when W / C is from 2 to 6,