Abstract
Grain-oriented electric steel is hot rolled at different hot rolling temperature, and subsequent thermal maintained. Precipitation features of MnS and Cu2S were observed under different process conditions using thermal field emission scanning electron microscopy. The results show that Cu is precipitate out in the form of a composite precipitate with MnS during hot rolling, The hot rolling temperature and the postrolling maintain time had no obvious effect on the precipitation of MnS, The lower the hot rolling temperature, the faster the Cu2S precipitation. And the insulation process after high temperature hot rolling can make a large number of the Cu2S diffusion precipitation, There was no significant effect on the precipitation of Cu2S after low temperature hot rolling, still remain in the precipitate state after hot rolling.
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