Heat treatment of ductile iron

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Heat treatment of ductile iron

Mar 15,2020

(1) Annealing-the purpose is to obtain the ferrite matrix structure and eliminate the casting stress;

(2) Normalizing-the purpose is to obtain P or P + F matrix, refine the structure, improve strength and wear resistance;

(3) Tempering-in order to obtain good comprehensive mechanical properties;

(4) Isothermal quenching-in order to obtain the nodular cast iron of B lower matrix.