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彩涂钢板最终产品板型的保证,与钢板的强度等级、压型钢板的板型以及加工机器等密切相关。总的来说,加工道次越多,板型越好,加工速度越
慢、板型越好。对压型钢板板型来说,浅波板的板型优于高波板。对钢板强度来说,强度加工后的板型变差的趋势越明显。高强钢的板型相对较差
还有另外一个原因就是很多彩涂生产厂仅靠降低热镀锌的退火温度来提高材料的屈服强度,这样就会导致钢板宽度方向上力学性能的不均衡。这种
不均衡是由整个宽度方向带钢温度的不均匀引起的,温度下降可能导致部分部位温度低于钢板再结晶的退火温度。
The guarantee of the final product plate type of the color-coated steel plate is closely related to the strength grade of the steel plate, the plate type of the
pressing steel plate and the processing machine. In general, the more the processing times, the better the plate, the slower the processing speed, the better
the plate. For the pressed steel plate type, the shallow wave plate type is better than the high wave plate. For the strength of steel plate, the trend of plate
shape variation after strength processing is more obvious. Another reason for the relatively poor plate shape of high strength steel is that many color coating manufacturers only reduce the annealing temperature of hot-dip galvanizing to improve the yield strength of the material, which will lead to the imbalance of mechanical properties in the width direction of the steel plate. This imbalance is caused by the inequality of the strip temperature in the whole width direction,
and the temperature drop may lead to the temperature below the annealing temperature of the plate recrystallization.