For martensitic high chromium cast iron, whether pre-impact or after impact, the metal mold cast one has better wear resistance than the sand mold cast one.

• 结果表明:当基体同为马氏体时,金属型高铬铸铁的耐磨性在冲击前、后都比砂型高铬铸铁好,冲击作用使金属型高铬铸铁的耐磨性略有降低而对砂型高铬铸铁的耐磨性影响较小;