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Effect of Hot Deformation on Formation and Growth of Thermal Fatigue Crack in Chromium Wear Resistant Cast Iron

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Abstract

The formation and growth of thermal fatigue crack in chromium wear resistant cast iron was investigated, and the effect of hot deformation on the crack was analyzed by means of optical microscope and scanning electron microscope and high frequency induction thermal fatigue tester. The results show that eutectic carbide is the main location and passage for initiation and extension of thermal fatigue cracks, hot deformation can improve the eutectic carbide’s morphology and distribution, inhibit the generation and propagation of thermal fatigue cracks. In the experiment, the propagation rate of thermal fatigue crack reduces with the quantity of hot deformation increasing, which was analyzed in the point view of the activation energy of crack propagation.

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Correspondence to Li-min Chang.

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Foundation Item: Item Sponsored by Guiding Program of Science and Technology Research of Jilin Province of China (20000513)

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Chang, Lm., Liu, Jh. Effect of Hot Deformation on Formation and Growth of Thermal Fatigue Crack in Chromium Wear Resistant Cast Iron. J. Iron Steel Res. Int. 13, 36–39 (2006). https://doi.org/10.1016/S1006-706X(06)60023-X

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  • DOI: https://doi.org/10.1016/S1006-706X(06)60023-X

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