Abstract
The effect of 0.34∼0.73% carbon content on phase transformation of carbon steel during quenching is examined experimentally. The temperature of Ar' phase transformation is a linear function of the cooling velocity at point A1 (727°C) and is not influenced by the carbon content. The temperature of Ar" phase transformation is affected considerably by the carbon content. The latent heat of phase transformation is independent of carbon content. Experimental expressions of the temperature and the latent heat of phase transformation for hypo-eutectoid steel are presented. The calculated cooling curves using these expressions agree with the experimental results.
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