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Heat treatment process of SPV490Q steel plate

Posted:2021-10-16 15:32:05

Analysis on the influence of heat treatment process of SPV490Q steel plate:
1. The SPV490Q steel plate produced by the direct quenching process has good strength and toughness matching. This process can replace the traditional offline modulation process to achieve the purpose of saving energy and reducing costs.

2. The strength of the directly quenched SPV490Q steel plate after tempering is relatively small, and the toughness is improved obviously; When the quenched steel plate is reheated for tempering, the strength will be greatly reduced. With the improvement of toughness and plasticity, the former has better tempering resistance.

3. The martensitic laths of high dislocation density lath martensite obtained by direct quenching are fine, bent and crossed with each other. After reheating the quenched steel, the martensite structure with low dislocation density and coarse martensite lath are obtained.

4. Under the same tempering conditions, the carbides precipitated by directly quenching SPV490Q steel plates are fine and dispersed, while the carbides precipitated by reheating and quenching steel plates are relatively coarse.