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熔制了一组高铬钼白口铸铁,采用垂直落锤试验评定化学成份和显微组织对其抗冲击断裂性能的影响。Cr/c比从3~7变化,显微组织为初生奥氏体枝晶和30%(容积量)的共晶碳化物。铬含量从9．7%(Cr/c＝3)至19．6%(Cr/C＝7)变化。随Cr/c比
A group of high chromium molybdenum white cast iron was melted. The vertical drop test was used to evaluate the influence of chemical composition and microstructure on the impact fracture resistance. The Cr / C ratio varied from 3 to 7 with microstructure consisting of primary austenitic dendrites and 30% (volumetric) eutectic carbides. The chromium content varies from 9.7% (Cr / c = 3) to 19.6% (Cr / C = 7). With Cr / c ratio