Method for annealing medium-high carbon steel continuous steel blanks
A medium-high carbon and steel billet technology, which is applied in the field of medium-high carbon steel cast steel stacking annealing and medium-high carbon steel continuous casting billet annealing, can solve the problem of high annealing cost, achieve low annealing cost and improve the pass rate
Active Publication Date: 2017-12-08
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Embodiment 1
[0024] Embodiment 1, the method for annealing continuous casting slabs of 55 steels, comprising:
[0025] When the 55 steel slab in the continuous casting-hot-rolled slab storage yard is cooled below 600 °C (55 steel Ar 1 The temperature is 690°C), and it is stacked with the 55 steel billet with a surface temperature of 800°C and a core temperature of 950°C just after the continuous casting production line. The upper surface is a high temperature 55 steel billet, and 12 billets are stacked. ;Through heat conduction, the high temperature 55 steel slab is slowly heated to the low temperature 55 steel slab, the heating rate is 60°C / h, and the heating time is 2h. 1 temperature (727°C);
[0026] Cover the bottomless insulation cover on the stack of 55 steel continuous casting slabs to reduce the heat loss of stacked slabs, make the temperature of high temperature 55 steel continuous casting slabs and low temperature 55 steel continuous casting slabs more uniform, and use thermal i...
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The invention relates to a method for annealing medium-high carbon steel continuous steel blanks, and mainly solves the technical problem of high annealing cost in traditional medium-high carbon steel continuous steel blanks. The method comprises the following steps: 1) the temperatures of the medium-high carbon steel continuous steel blanks in a plate blank library are measured; 2) the medium-high carbon steel continuous steel blanks with the temperatures of 400-700 DEG C and the medium-high carbon steel continuous steel blanks with the temperatures of 750-1000 DEG C are stacked on the ground paved with refractory bricks at intervals; and high-temperature steel blanks transfer heat to low-temperature steel blanks for slow heating by 2-2.5 h; 3) a bottomless insulation cover covers the medium-high carbon steel continuous steel blank stack for insulating the medium-high carbon steel continuous steel blanks by 1-2 h, and then, is shifted away; and 4) when the temperatures of the medium-high carbon steel continuous steel blanks are not higher than 500 DEG C, the medium-high carbon steel continuous steel blank stack is dismounted, and annealing of continuous-cast steel blanks is finished. The annealing method reduces the cracking, warping and breaking frequency of high-carbon steel casting blanks in the stack, increases the pass percent of the steel blanks, and is low in annealing cost.
Description
technical field [0001] The invention relates to a medium-high carbon steel continuous casting billet, in particular to a method for annealing a medium-high carbon steel continuous casting billet, in particular to a method for stacking and annealing medium-high carbon steel cast steel at different temperatures. Background technique [0002] The slab is subjected to various external forces during the continuous casting process, such as the friction between the mold shell and the copper plate, the bulging force caused by the static pressure of the molten steel, the thermal stress, the bending or straightening force of the slab, the additional stress caused by the misalignment of the support rolls, and phase transition stress. The superposition of these stresses constitutes the internal stress of different parts of the slab, and this stress generally increases with the increase of the alloy elements in the steel and the thickness of the slab. Cracks may occur in the continuous ...
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IPC IPC(8): C21D1/30
CPCC21D1/30
Inventor 倪修华李玉娣陈艳江中块
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD