What is peritectic reaction ?

Peritectic Reaction Definition


A reaction wherever in, upon cooling a solid and a liquid part rework isothermally and reversibly to a solid part having completely different composition is named a peritectic reaction. Example: Liquid + alpha ---> beta



Peritectic Reaction in Steel


The work presented here examines the surface cracks which will form during the continual casting of near peritectic steels thanks to the quantity changes during the peritectic reaction/transformation. The investigated samples were collected during plant trials from two different steel grades. The role and mode of the peritectic reaction/transformation are found to depend upon the composition of the alloy, leading to differing types of surface cracks. The effect of the local variation within the cooling rate on the formation of the various sorts of cracks present in each steel grade, which may flow from , for instance , to the formation of oscillation marks, is demonstrated. the improved severity of the surface and internal oxidation, both of which depend upon the alloy composition and consequent peritectic reaction, is highlighted. Experimental and theoretical studies show that differing types of surface cracks can occur in peritectic steels depending upon the alloy composition and cooling rate, both of which define the fraction of the remaining liquid upon completion of the peritectic reaction/transformation.

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