Container plate with good strength and toughness and production method thereof

Abstract

The invention discloses a container plate with good strength. The container plate comprises the following chemical components of, in percentage by weight, 0.04%-0.06% of C, 0.20%-0.25% of Si, 0.50%-0.60% of Mn, 0.070%-0.080% of P, less than or equal to 0.005% of S, 0.015%-0.050% of Als, 0.010%-0.020% of Nb, 0.36%-0.40% of Cu, 0.38%-0.48% of Cr, 0.21%-0.25% of Ni and the balance Fe and inevitable impurities, wherein Cu / Ni is larger than or equal to 1.44 and less than or equal to 1.90. Due to the reasonable design of chemical components in the steel, the produced container plate has good strength and toughness, and in performance inspection, the tensile, bending and impact properties are good.

Description

technical field [0001] The invention belongs to the technical field of weather-resistant steel plates, and in particular relates to a container plate with good strength and toughness and a production method thereof. Background technique [0002] With the development of China's economy, China's exchanges with the world have become more and more extensive, and the import and export of foreign commodities has become more and more developed, while the demand for containers required for transportation is increasing. At the same time, my country is the world's largest producer of containers, accounting for about 90% of the world's containers, with an annual demand of more than 3 million tons, and the demand is increasing every year. However, about 30% of my country's container boards need to be imported. There is a certain gap between the quality of the container boards produced by my country's steel enterprises and foreign products, and the production process and technology need ...

AI Technical Summary

Problems solved by technology

However, about 30% of my country's container boards need to be imported. There is a certain gap between the quality of the container boards produced by my country's steel enterprises and foreign products, and the production process and technology need to be further improved.

This is mainly because the container steel contains many alloy components, especially the high content of Cu and P, which makes the steel plate prone to internal and external cracks, and bending crack defects appear during the bending test. bottleneck

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