Cold-rolled steel plate control method

Abstract

The invention discloses a cold-rolled steel plate control method. The cold-rolled steel plate control method is simple, rapid and efficient and can guarantee qualified finish product production. According to the technical scheme, the cold-rolled steel plate control method sequentially comprises the following steps of 1) examining the outer surface of a steel plate and ensuring no bubble, no crack, no scab, no layering, no tensile crack and no inclusion of the steel plate; 2) detecting the thickness allowance, the hardness and the ductility of the steel plate selected in the step 1), and enabling the indexes to be in the following ranges including a thickness allowance range of 0.4-1.0+-0.01 mm, a hardness range of 50-54 HRB and a ductility range of 31%-34% for a medium-drawing cold-rolled plate, and a thickness allowance range of 0.48-1.0+-0.01 mm, a hardness range of 45-51 HRB and a ductility of 36%-42%. The cold-rolled steel plate control method belongs to the technical field of steel plates.

Description

Technical field [0001] The invention discloses a steel plate control method, specifically, a cold-rolled steel plate control method, which belongs to the technical field of steel plates. Background technique [0002] Cold rolled steel plates are steel plates produced through cold rolling. Cold rolling is to further thin the No. 1 steel sheet to a target thickness under room temperature conditions. Compared with hot-rolled steel plates, cold-rolled steel plates are more accurate in thickness, and have smooth and beautiful surfaces. At the same time, they have various superior mechanical properties, especially in terms of processing properties. Because cold-rolled raw coils are relatively brittle and hard, and not suitable for processing, cold-rolled steel sheets are usually required to be annealed, pickled and surface smoothed before being delivered to customers. The maximum thickness of cold-rolled is 0.1-8.0mm or less. For example, the thickness of cold-rolled steel plate in m...

AI Technical Summary

Problems solved by technology

The hot-rolled steel coil is used as the raw material, and the scale is removed by pickling, followed by continuous cold rolling. The finished product is hard rolled coil. Due to the cold hardening caused by continuous cold deformation, the strength and hardness of the hard rolled coil increase, and the ductility and plastic index decrease. , so the stamping performance will deteriorate and can only be used for simple deformed parts