Tinned plate and production method thereof

Abstract

The invention discloses a tinned plate and a production method thereof and relates to the technical field of iron and steel smelting. The tinned plate comprises carbon, silicon, manganese, phosphorus,sulfur, nitrogen and iron, wherein the tinned plate comprises the following chemical components in percent by mass: 0.09-0.15% of carbon, 0.005-0.02% of silicon, 0.03-0.07% of tin, 0.001-0.009% of lead, 0.0005-0.50% of manganese, 0.01-0.015% of phosphorus, 0.003-0.0125% of sulfur, 0.003-0.015% of nitrogen and the balance iron and inevitable impurity elements. By controlling the heating temperature, the finishing temperature and the rolling temperature of a continuous casting sheet billet, controlling the cold rolling reduction rate and optimizing the annealing temperature and the annealing time of a continuous annealing furnace, it is ensured that the yield strength of the cold rolled tinned plate meets the requirements, the tinned plate is good in shape, has a good stamping property andmeets a stamping manufacturing demand. The material components do not contain precious alloy elements and are produced by adopting controlled rolling and controlled cooling process and a reasonable annealing temperature control technique, so that the tinned plate is simple in process and relatively low in manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a tinplate and a production method thereof. Background technique [0002] Tinplate has high requirements on the strength, hardness and performance uniformity of the material. In the production process of tinplate, if the strength is lower than the specified requirement, the strength of the whole batch of steel coils cannot be kept uniform and stable. In the subsequent stamping, etc. Crack defects are easy to occur during cold deformation, which reduces the yield and increases production costs. At present, when most manufacturers choose tin-plated steel, they generally use SPCC series steel grades, but SPCC has a wide range of carbon content, and the carbon content is controlled at 0.01-0.09%, which meets the requirements, and the carbon content fluctuates greatly, resulting in material The strength and ductility of the tinplate cannot be well matched,...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a tinplate and its production method, which solves the problem of poor uniformity of strength and good performance of the existing tinplate