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The effect of austempering temperature on the microstructure and properties of a high chromium white cast iron was investigated with the Rietveld refinement method.The result shows that the upper bainite exists in the sample austempered at 623 K and the martensite,lower bainite,M7C3,and retained austenite exist in the samples austempered at 563 K and 593 K.The relative content of the retained austenite increases with increasing the austempering temperature from 563 K to 623 K.The higher hardness,impact toughness and impact abrasive wear resistance can be obtained for the specimen austempered at 593 K.
The effect of austempering temperature on the microstructure and properties of a high chromium white cast iron was investigated with the Rietveld refinement method. The result shows that the upper bainite exists in the sample austempered at 623 K and the martensite, lower bainite, M7C3, and retained austenite exist in the samples austempered at 563 K and 593 K.The relative content of the retained austenite increases with increasing the austempering temperature from 563 K to 623 K. The higher hardness, impact toughness and impact abrasive wear resistance can be for the the specimen austempered at 593 K.