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采用铸造方法，将不同直径的４５钢钢筋包覆在铬白口铸铁《低络和中铬》芯部，研究了所得复合试样的组织与性能。结果表明，选用较大直径比《钢筋直径／试样直径）并经适当热处理，可获得较理想的综合性能。外层铬白口铸铁的硬度可达ＨＲＣ６１．５～６４．５，复合试样的抗弯强度可达。δｗ＝７００～１０００ＭＰａ，比单－铬白口铸铁提高４０～４５％。
Using the casting method, 45 steel bars of different diameters were coated on the “low and medium chromium” core of chrome white cast iron, and the microstructure and properties of the obtained composite samples were studied. The results show that the choice of a larger diameter ratio "diameter / sample diameter) and the appropriate heat treatment, you can get a better overall performance. The outer layer of chrome white cast iron hardness up to HRC61.5 ~ 64.5, the composite specimen up to the flexural strength. δw = 700 ~ 1000MPa, than the single-chrome white cast iron increased 40 ~ 45%.