Production method of rectangular flat steel with decarburized layer depth smaller than or equal to 0.3% thickness
The invention discloses a production method of rectangular flat steel with the depth of a decarburized layer smaller than or equal to 0.3% of the thickness, and belongs to the technical field of metallurgy. The method comprises the following steps: carrying out cold charging on an unpolished blank,...
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| creator | JU YINJUN WANG XUJI ZHANG JIE XIE YAOKUI YANG GENGCHAO ZHU WENBIN LUO JINGXIAN |
| description | The invention discloses a production method of rectangular flat steel with the depth of a decarburized layer smaller than or equal to 0.3% of the thickness, and belongs to the technical field of metallurgy. The method comprises the following steps: carrying out cold charging on an unpolished blank, closing an I section adding burner before the unpolished blank enters a furnace, and carrying out low-temperature heating by adopting a sectional heating process, wherein the temperature of a preheating section is less than or equal to 600 DEG C, the temperature of a heating section is 980-1030 DEG C, the temperature of a soaking section is 1010-1040 DEG C, the furnace pressure is micro-positive pressure, the heating mode is low-temperature rapid heating, the heating time is 150-350 minutes, and the residual oxygen of a heating furnace is less than or equal to 0.1%. After discharging, high-pressure water of 28 MPa or above is adopted for descaling, after rolling, through-water controlled cooling is adopted to reach |
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The method comprises the following steps: carrying out cold charging on an unpolished blank, closing an I section adding burner before the unpolished blank enters a furnace, and carrying out low-temperature heating by adopting a sectional heating process, wherein the temperature of a preheating section is less than or equal to 600 DEG C, the temperature of a heating section is 980-1030 DEG C, the temperature of a soaking section is 1010-1040 DEG C, the furnace pressure is micro-positive pressure, the heating mode is low-temperature rapid heating, the heating time is 150-350 minutes, and the residual oxygen of a heating furnace is less than or equal to 0.1%. 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| subjects | ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS |
| title | Production method of rectangular flat steel with decarburized layer depth smaller than or equal to 0.3% thickness |
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