Thin-specification container board and manufacturing method thereof

Abstract

The embodiment of the invention provides a thin-specification container board. Thin-specification container board steel consists of the following components in percentage by mass: 0.05%-0.065% of C, 0.20%-0.4% of Si, 0.30%-0.45% of Mn, 0.07%-0.12% of P, 0.3-0.5% of Cr, 0.03-0.05% of Ti, less than or equal to 0.006% of S, 0.20%-0.35% of Cu, and the balance of Fe and other inevitable impurities. Thethin-specification container board is reasonable in constituent elements, which are matched with one another, and corresponding content. The constituent elements do not comprise an element Ni, and content of P and Cu is controlled to compensate loss of strength and weather resistance of the Ni-reduced thin-specification container board, and restrain occurrence of the copper brittleness defect. The thin-specification container board is lower in cost without higher-cost element Ni, and has better mechanical property and weather resistance.

Description

technical field

[0001] The present application relates to the technical field of container boards, and more specifically, relates to a thin-gauge container board and a preparation method thereof. Background technique

[0002] As a major product in hot-rolled commodity coils, container plate has an annual demand of about several million tons. Its notable features are thin specifications, high strength and high weather resistance. The thinnest commonly used specification thickness is 1.6mm, accounting for about The ratio is 16%, and the tensile strength is required to be greater than 490MPa. Compared with ordinary carbon steel Q235B, the relative corrosion rate of 72h cycle infiltration corrosion is less than 60%. In order to ensure the weather resistance of the steel, a large amount of expensive Cu and Ni corrosion-resistant alloy elements are added, which also significantly increases the cost of the alloy. Therefore, it is of great significance to carry out research on the ...

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