Steel plate for can and method for producing same

Abstract

The purpose of the present invention is to provide: a steel plate for use in a can and exhibiting sufficient hardness and excellent can-torso buckling strength against external pressure; and a method for producing the same. The component composition for this steel plate for use in a can contains, in mass%, C in the amount of 0.0005-0.0030%, inclusive, Si in the amount of 0.05% or less, Mn in the amount of 0.50-1.00%, inclusive, P in the amount of 0.030% or less, S in the amount of 0.020% or less, Al in the amount of 0.01-0.04%, inclusive, N in the amount of 0.0010-0.0050%, inclusive, and B in the amount of 0.0005-0.0050%, inclusive, with the remainder constituting Fe and inevitable impurities. Furthermore, the hardness (HR30T) thereof is 56 or higher, and the average Young's modulus thereof is 215GPa or higher.

Description

technical field [0001] The present invention relates to a steel plate for cans suitable for can container materials used in food and beverage cans and a manufacturing method thereof. In particular, it relates to a steel plate for a can that is excellent in buckling strength against external pressure in a body portion suitable as a steel plate for a two-piece can, and a method for manufacturing the same. Background technique [0002] In recent years, from the viewpoint of reducing environmental load and reducing costs, it is required to reduce the amount of steel sheets used in food and beverage cans, and thinning of steel sheets is being carried out regardless of whether it is two-piece cans or three-piece cans. With the thinning of the steel plate, the strength and rigidity of the tank body decrease. Therefore, the following problems will arise: that is, the deformation of the can body caused by external forces acting during the can making, transportation process, and oper...

AI Technical Summary

Problems solved by technology

With the thinning of the steel plate, the strength and rigidity of the tank body are reduced

Therefore, the following problems will arise: that is, the deformation of the can body caused by external forces acting during the can making, transportation process, and operation in the market, and the increase and decrease of the internal pressure of the can during the heat sterilization process of the contents, etc. Buckling deformation of the can body

However, when the hardness of the steel plate increases due to the increase in strength, the formability decreases, and there is a high incidence of necking wrinkles and flange fractures in the necking process performed after the body forming and the subsequent flange forming. The problem of increasing the formability of such

Therefore, high-strength steel sheets are not necessarily suitable as a solution to the problem of buckling deformation associated with thinning steel sheets.

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