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Steel with tensile strength of 500 MPa for solar support and production method

A technology of tensile strength and production method, applied in the field of metallurgy, can solve the problems of high alloy consumption, waste of resources, etc., and achieve the effects of low alloy content, green manufacturing, and high tensile strength

Inactive Publication Date: 2021-02-23
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional steel with a tensile strength of 500 MPa is alloyed with carbon and manganese, and the manganese element is usually greater than 1.5%, which leads to high alloy consumption and waste of resources

Method used

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  • Steel with tensile strength of 500 MPa for solar support and production method
  • Steel with tensile strength of 500 MPa for solar support and production method
  • Steel with tensile strength of 500 MPa for solar support and production method

Examples

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Embodiment 1-8

[0021] Embodiment 1-8: The steel used for the solar bracket with a tensile strength of 500 MPa and its production method are as follows.

[0022] (1) Smelting and continuous casting process: to achieve accurate control of slab composition within a certain range, the chemical composition and mass percentage of the obtained slab are: C 0.15~0.18%, Si≤0.05%, S≤0.008%, Mn 0.65~0.75%, P≤0.020%, Als 0.015~0.040%, Nb 0.007~0.017%, Ti 0.045~0.060%, N≤0.0060%, the balance is Fe and unavoidable impurities. The specific chemical composition of the slab obtained in each embodiment is shown in Table 1.

[0023] Table 1: The specific chemical composition (wt%) of the slab obtained in each embodiment

[0024]

[0025] (2) Slab heating, controlled rolling and cooling process: the slab heating process has a heating temperature of 1200-1250°C. In the controlled rolling process, the final rolling temperature is 860-900° C., and the reduction rate of the finishing stand is ≥10%, preferably 1...

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Abstract

The invention discloses steel with the tensile strength of 500 MPa for a solar support and a production method. The steel comprises, by mass, 0.15%-0.18% of C, smaller than or equal to 0.05% of Si, smaller than or equal to 0.008% of S, 0.65%-0.75% of Mn, smaller than or equal to 0.020% of P, 0.015%-0.040% of Als, 0.007%-0.017% of Nb, 0.045%-0.060% of Ti, smaller than or equal to 0.0060% of N and the balance Fe and inevitable impurities. The steel adopts medium-carbon, low-manganese and niobium-titanium microalloy strengthening design, the tensile strength is larger than or equal to 500 MPa, the yield strength is larger than or equal to 420 MPa, the ductility is larger than or equal to 18%, and the product has the characteristics of being good in welding performance, low in alloy content, good in galvanizing effect and the like. According to the method, low-price carbon element strengthening, a small amount of manganese elements and a small amount of niobium-titanium microalloy elementsare adopted, a controlled rolling and controlled cooling rolling method is adopted, high strength and low alloy consumption are achieved, green manufacturing of the steel is achieved, and the producthas the characteristics of high tensile strength, high yield strength, good elongation and the like.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a steel for solar support with a tensile strength of 500 MPa and a production method thereof. Background technique [0002] Solar cell power generation is a new energy industry, which is of great significance to reducing carbon emissions and environmental protection. The annual demand for steel for solar support is about 1 million tons. With the pressure of resources and environmental protection, it is necessary to reduce resource consumption and improve the performance of materials. The green production of solar energy is imperative, and it is of great significance to develop low-cost and environmentally friendly special steel for solar brackets. [0003] Traditional steel with a tensile strength of 500 MPa is alloyed with carbon and manganese, and the manganese element is usually greater than 1.5%, which leads to high alloy consumption and waste of resources. Therefore, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C21D8/02C22C33/04
CPCC21D8/0205C21D8/0226C21D8/0263C21D2211/004C21D2211/005C21D2211/009C22C33/04C22C38/001C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 陆凤慧胡德勇陈国涛李洋蔡秀丽赵树忠赵颖田鹏
Owner HEBEI IRON AND STEEL
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