Straightening method preventing steel plates from buckling
A steel plate and straightening technology, which is applied in the field of straightening to prevent buckling of steel plates, can solve the problems of uneven temperature distribution, buckling, and inconsistent deformation of steel plates on the surface of the steel plate, so as to avoid buckling and reduce temperature unevenness. The effect of improving the qualification rate of plate shape
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Embodiment 1
[0016] Pipeline steel X80, finished product specification 26.4×3715×25000, final cooling actual temperature 480±30℃;
[0017] 1) After the steel plate is rolled, the shape of the plate is good without obvious waves, and the edge of the plate is slightly upturned after watering. Straightening is carried out in 3 passes, the roll gap is set to 21.1mm in the first pass, the tilting weight reaches 6mm, and the bending roll is not used;
[0018] 2) After the first pass is completed, the roll gap is adjusted to 23.2mm, no bending rolls are used, the tilting weight reaches 4mm, and the second pass of straightening is completed.
[0019] 3) After the second pass is completed, the steel plate swings on the roller table, waits for 60 seconds, the roll gap is adjusted to 21.1mm, and the third pass of straightening is completed. After the straightening is completed, the steel plate waits for Warm for 50s and enter the cooling bed for cooling.
Embodiment 2
[0021] A high-strength low-alloy steel plate, the finished product specification is 27.5×3720×25000, and the actual temperature of final cooling is 350±30℃;
[0022] 1) After the rolling of the steel plate is completed, the shape of the plate is slightly waved on both sides, and there are obvious edge waves after watering. Straightening is carried out in 5 passes, the roll gap is set to 24mm in the first pass, the tilting weight reaches 4mm, positive bending rolls are used, and the set value is 0.4mm, the first pass of straightening is completed;
[0023] 2) After the first pass is completed, the roll gap is adjusted to 25.2mm, the tilting weight reaches 4mm, and the set value of the positive bending roll is 0.2mm, and the second pass of straightening is completed.
[0024] 3) After the third pass is completed, the steel plate swings on the roller table, waits for 30s for temperature, adjusts the roll gap to 22.5mm, does not use bending rollers, and completes the third pass of...
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