What is the function of EN10025-5 S235J2W steel plate quenching

The purpose of quenching is to improve the hardness, strength and wear resistance of EN10025-5 S235J2W steel plate, and give full play to the performance potential of EN10025-5 S235J2W steel plate. However, quenched martensite is not the final structure required by heat treatment, so it must be tempered properly after quenching.

When EN10025-5 S235J2W steel plate is quenched, the cooling rate from the surface to the center decreases gradually. Only when the cooling rate is greater than the critical cooling rate VC of the steel, all martensite can be obtained, which is the "hardened layer" of the steel. The so-called hardenability of EN10025-5 S235J2W steel plate refers to the ability to obtain martensite layer depth during quenching.

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