Fine grain steel with tensile strength of 1500 MPa and preparation method thereof

A technology of tensile strength and fine grain, which is applied in the field of research and development of fine grain steel production, can solve the problems that the production process is difficult to reach the tensile level, and achieve the effect of improving toughness and tensile capacity

Active Publication Date: 2021-02-26
JIANGSU YONGGANG GROUP CO LTD
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Problems solved by technology

[0004] The invention provides a fine-grained steel with a tensile strength of 1500MPa and a preparation method thereof, aiming to solve the problem that with the continuous development of science and technology and the continuous improvement of building safety, the demand for rigid-strength steel is getting higher and higher, and the existing production process The problem that it is difficult to meet the requirement that the tensile level reaches 1500MPa

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  • Fine grain steel with tensile strength of 1500 MPa and preparation method thereof

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[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] The invention provides a technical solution: a fine-grained steel with a tensile strength of 1500 MPa, the chemical composition ratio of the fine-grained steel: C: 0.21-0.26wt%, Si: 0.40-0.54wt%, Mn: 1.48-1.66wt% %, Cr: 0.20~0.25wt%, Nb: 0.012~0.017wt%, V: 0.095~0.110wt%, S: ≤0.040wt%, P: ≤0.043wt%, O: ≤0.0070wt%, N: 0.0240 ~0.0265wt%, the rest is Fe and impurities that cannot be purified at this stage.

[0025] In this embodiment, the steel material is firstly heated and melted, and the heating is continued to rapidly reduce the amount of oxygen in the steelmaking furnace. When tapping beg...

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Abstract

The invention belongs to the technical field of production, research and development of fine grain steel, and provides fine grain steel with the tensile strength of 1500 MPa and a preparation method thereof. The fine grain steel is prepared from the following chemical components in percentage by weight: 0.21-0.26% of C, 0.40-0.54% of Si, 1.48-1.66% of Mn, 0.20-0.25% of Cr, 0.012-0.017% of Nb, 0.095-0.110% of V, less than or equal to 0.040% of S, less than or equal to 0.043% of P, less than or equal to 0.0070% of O, 0.024-0.0265% of N and the balance of Fe and impurities which cannot be purified at the present stage. According to the fine grain steel with the tensile strength of 1500 MPa, the toughness of steel is improved, the steel has the tensile strength of at least 1500 MPa, and the production and living requirements of people are met.

Description

technical field [0001] The invention belongs to the field of research and development of fine-grained steel production, and in particular relates to a fine-grained steel with a tensile strength of 1500 MPa and a preparation method thereof. Background technique [0002] Steel is a material of a certain shape, size and performance made of steel ingots, billets or steel through pressure processing. Most steel processing is through pressure processing, which causes plastic deformation of the processed steel (billet, ingot, etc.). According to the different processing temperature of steel, it can be divided into cold processing and hot processing. [0003] With the continuous development of science and technology and the continuous improvement of building safety, the demand for rigid steel is getting higher and higher. It is difficult for the existing production process to meet the requirement of tensile grade of 1500MPa. Contents of the invention [0004] The invention provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/24C22C38/26C22C38/38C21D1/18C21D6/00C21D8/02C21D9/00C22C33/04
CPCC22C38/02C22C38/04C22C38/38C22C38/26C22C38/24C22C38/002C22C38/001C21D1/18C21D6/002C21D6/005C21D6/008C22C33/04C21D8/0221C21D9/0081
Inventor 蔡雪贞徐卫单文瑞
Owner JIANGSU YONGGANG GROUP CO LTD
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