Production method of anti-aging tinning black plate

Abstract

The invention relates to a production method of an anti-aging tinning black plate with hardness HR30Tm of 55+ / -4 and discloses a production method of an anti-aging tinning black plate. The method comprises the following steps: smelting: adopting KR desulfurization, smelting in a converter, RH vacuum treatment and continuous casting; hot rolling: carrying out the hot rolling of a continuous casting blank comprising the following chemical components in percentage by weight: C: 0.02-0.06, Si: smaller than or equal to 0.025, Mn: smaller than or equal to 0.50, P: smaller than or equal to 0.020, S:smaller than or equal to 0.030, Als: 0.005-0.040, Ti: 0.005-0.020, N: smaller than or equal to 0.005, the balance of Fe and inevitable impurities; and carrying out pickling, cold rolling, electrolytic degreasing, full-hydrogen bell furnace annealing and leveling of a tinning black plate with hardness HR30Tm of 51-59. The invention has the advantages of small production control difficulty and low cost and hardness value, is beneficial for users to use the anti-aging tinning black plate to manufacture deep drawing cans and can lids with complicated deformation, lessens the canning defects of cracks, crazing slip lines or corded bent surfaces, and the like and improves the canning yield rate and the canning qualified rate.

Description

technical field [0001] The technology relates to a production method of a tin-plated original plate, in particular, it belongs to a production method of an aging-resistant tin-plated original plate whose hardness HR30Tm is within 55±4. Background technique [0002] There are two annealing methods for cold-rolled tin-plated raw plates, namely bell furnace annealing (BA) and continuous annealing (CA). [0003] The annealed steel plate still has some free C and N atoms. If the annealed steel plate is placed at room temperature for a long time, or heated for a short time at a slightly higher temperature, a yield plateau will occur, and the yield point itself will also be lower. This change in performance over time is called aging. When the tinplate with a yield platform is stamped and formed, wrinkles will occur on its surface, which will affect the product quality and even cause the workpiece to be scrapped and the product to be beautiful. Due to the short annealing time and ...

AI Technical Summary

Problems solved by technology

[0005] The disadvantage of using continuous annealing furnace (CA) to produce soft tinplate: because the original tinplate is very thin, IF steel or low-carbon aluminum-killed steel is soft, coupled with high-temperature annealing, it is prone to hot scoop during continuous annealing of steel strip Problems such as bending, broken belt, etc.

In order to avoid problems such as heat warping and broken belts, people generally take measures to reduce the production speed of the unit, which in turn leads to a reduction in production efficiency and yield, and high production costs.