A production method for reducing the narrow head of non-oriented silicon steel
A production method and head technology, applied in the direction of metal rolling, metal processing equipment, manufacturing tools, etc., can solve the problems of prolonging the delivery cycle, reducing the yield of finished products, increasing the amount of block cutting, etc., so as to reduce the accident rate and reduce the Effect of quality objection and reduction of rolling cost
Active Publication Date: 2020-06-23
ANGANG STEEL CO LTD
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Problems solved by technology
The increase of the blockage rate of the narrow head of the head will increase the amount of blockage and resection, increase the workload of the coiling process, prolong the delivery cycle, reduce the yield and increase the rolling cost; Rolling through the strip, unstable rolling, prone to accidents such as buckling and steel jamming; third, the narrow ruler at the head will cause quality objections and seriously affect the image of the steel company
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0027] A production method for reducing the narrow ruler of 50AW1300 silicon steel head. Specifically include the following methods
[0028] 1) Control the furnace temperature of the slab:
[0029] Control the temperature of the slab out of the furnace, so that the temperature out of the furnace = the target value ± 20 ° C, the temperature difference between the slab furnaces ≤ 10 ~ 20 ° C, the watermark temperature difference ≤ 10 ~ 20 ° C, the temperature difference between the head and tail of the slab ≤ 20 ~ 30 ° C, two adjacent pieces Steel rough rolling RT2 temperature ≤ 10 ~ 20 ℃;
[0030] 2) Optimize the mathematical model of the rough rolling secondary width:
[0031] According to the calculation formula: L2=(L1×B1×H1) / (B2×H2)
[0032] In the formula: L1 is the actual measured strip steel narrow ruler length, mm;
[0033] B1 is the actual measured width of strip steel narrow ruler, mm;
[0034] H1 is the actual measured strip thickness, mm;
[0035] L2 is the le...
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The invention relates to the technical field of rolled steel, in particular to a production method for reducing head narrow rulers of non-oriented silicon steel. The production method comprises the steps of: 1) control of the plate blank discharge temperature; 2) optimization of a rough milling two-grade width mathematical model; and 3) optimization of a finish rolling forward sliding two-grade mathematical model. The production method reduces the blockage rate of the head narrow rulers, reduces the rolling cost, improves the yield, reduces the enterprise loss, reduces the accident occurrencerate caused by the head narrow rulers, reduces waste products, reduces the quality objection caused by the head narrow rulers, and improves the reputation of steel and iron enterprises.
Description
technical field [0001] The invention relates to the technical field of steel rolling, in particular to a production method for reducing the narrow head of non-oriented silicon steel. Background technique [0002] At present, when rolling silicon steel, the blockage rate of the narrow gauge at the head is over 90%, and it is necessary to cut 20-40m in the coiling unit to meet the quality requirements. Through on-site tracking and secondary data model analysis, since the width of the hot-rolled strip is mainly controlled by the roughing mill, the method of increasing the angle of the looper during the strip threading of the finish rolling, that is, "pull the looper", is used to ensure the strip threading. The stability of the belt prevents accidents such as head bending and steel jamming. The increase of the blockage rate of the narrow head of the head will increase the amount of blockage and resection, increase the workload of the coiling process, prolong the delivery cycle,...
Claims
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IPC IPC(8): B21B37/16
CPCB21B37/16
Inventor 王存李秋鹤何士国马振伟刘旺臣刘金超李江委贺亮王杰张吉富
Owner ANGANG STEEL CO LTD