High-strength and high-conductivity flat steel and manufacturing method and application thereof

Abstract

The invention belongs to the technical field of electrode flat steel for electrolytic aluminum industry, and discloses high-strength and high-conductivity flat steel and a manufacturing method and application thereof. The high-strength and high-conductivity flat steel is composed of the following components in percentage by weight: less than or equal to 0.006% of C, less than or equal to 0.05% of Si, more than or equal to 0.15% and less than or equal to 0.20% of Mn, less than or equal to 0.02% of P, less than or equal to 0.004% of S, less than or equal to 0.05% of Ti and the balance Fe and inevitable impurities. According to the high-strength and high-conductivity flat steel, through component control, the electrical resistivity delta of the flat steel is smaller than or equal to 11*10<-8> omega.m (20 DEG C), and the yield strength Rp0.2 is larger than or equal to 355 MPa. According to the smelting and machining method of the high-strength and high-conductivity flat steel, the content of all components in the flat steel and the rolling temperature and the cooling temperature in the machining process are accurately controlled, so that the conductivity of the electrode flat steel is greatly improved, and the strength is greatly improved due to addition of Ti element.

Description

technical field [0001] The invention belongs to the technical field of electrode flat steel used in the electrolytic aluminum industry, and in particular relates to a high-strength and high-conductivity flat steel and a manufacturing method and application thereof. Background technique [0002] At present, with the continuous popularization of the green concept, the global emphasis on the ecological environment is increasing day by day, and the introduction of new national macro-control policies, enterprises are facing increasing pressure on energy conservation and emission reduction. The demand for high-strength and high-conductivity steel materials in my country's manufacturing industry is also growing. In 2018, China's electrolytic aluminum output was 36.78 million tons. According to statistics, the average power consumption per ton of electrolytic aluminum in my country is 140 million hours, and the cost of electricity accounts for about 45% of the total cost. As an im...

AI Technical Summary

Problems solved by technology

Although the method of simply reducing C, N, Mn and other elements in steel can improve the conductivity of steel, the strength of steel will inevitably decrease with the reduction of solid solution elements in steel, and it is impossible to achieve the unity of high conductivity and high strength.

In addition, after the C, N, Mn and other elements in the steel are reduced to a certain level, if they are further reduced, higher and more stringent requirements will be imposed on the iron and steel smelting technology, and the actual manufacturing cost will also increase significantly.

It can be seen that it is difficult to further improve the conductivity and strength of conductive steel under the existing control measures, which has become a bottleneck restricting the development and expansion of the application of conductive steel

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