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High-toughness lightweight steel plate as well as preparation method and application thereof

A lightweight, high-strength technology, applied in the field of alloys, which can solve problems such as poor impact toughness of steel plates

Active Publication Date: 2022-07-22
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a large amount of two elements exist at the same time, it is easy to precipitate brittle κ carbides (Fe, Mn) during cooling 3 AlC, resulting in poor low-temperature impact toughness of the steel plate

Method used

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  • High-toughness lightweight steel plate as well as preparation method and application thereof
  • High-toughness lightweight steel plate as well as preparation method and application thereof
  • High-toughness lightweight steel plate as well as preparation method and application thereof

Examples

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preparation example Construction

[0056] The present invention also provides a method for preparing the high-strength and toughness light-weight steel plate according to the above technical solution, comprising the following steps:

[0057] According to the elemental composition of the high-strength and toughness light-weight steel plate, after mixing the preparation raw materials, smelting and pouring are performed in sequence to obtain an ingot;

[0058] The ingot is sequentially rolled and quenched and solid-solutionized to obtain the high-strength and tough light-weight steel plate.

[0059] In the present invention, unless otherwise specified, all preparation raw materials are commercially available products well known to those skilled in the art.

[0060] According to the element composition of the high-strength-toughness light-weight steel plate, in the present invention, the raw materials are mixed, followed by smelting and pouring to obtain an ingot.

[0061] In the present invention, the preparation...

Embodiment 1

[0083] The composition of the high-strength and tough light-weight steel plate is shown in Table 1:

[0084] making process:

[0085] Add electrolytic manganese, graphitized carbon powder, metal niobium, metal titanium, pure copper, metal cerium and chromium nitride into the vacuum induction furnace, evacuate to below 0.1Pa, and energize the raw materials to melt the raw materials. Add pure aluminum in 3 batches, and after all the raw materials are melted, refine for 30 minutes, and fully stir to make the molten steel fully homogenized. Demoulding, slow cooling to room temperature at a cooling rate of 13°C / h to obtain an ingot;

[0086] The ingot is heated up to the rolling temperature at a heating rate of 38°C / s, and is kept warm (as shown in Table 3), and after the structure is completely uniform, rolling is performed. The thickness of the rolled sheet is shown in Table 3; after the rolling is completed, the quenching and solid solution are carried out immediately, and the...

Embodiment 2～3

[0089] The composition of the high-strength and tough light-weight steel plate is shown in Table 1:

[0090] The preparation process refers to Example 1, and the specific conditions and parameters are shown in Table 3. The difference is that after the ingot is obtained, it also includes peeling and grinding the ingot, and after removing the surface microcracks and oxide scale, it is used as an electrode rod for electroslag remelting. , in order to prevent the electroslag ingot from producing defects; then the ingot is remelted at a rate of 7Kg / min and then solidified. During the electroslag remelting process, argon gas is used to protect, remove the film, and cool at a rate of 10°C / h to room temperature.

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Abstract

The invention relates to the technical field of alloys, in particular to a high-toughness lightweight steel plate and a preparation method and application thereof. The invention provides a high-toughness light steel plate which comprises the following elements in percentage by mass: 27 to 30 percent of Mn, 8.30 to 9.20 percent of Al, 0.93 to 1.02 percent of C, 0.05 to 0.25 percent of Cr, 0.07 to 0.10 percent of Cu, 0.01 to 0.10 percent of Nb, 0.05 to 0.15 percent of Ti, less than or equal to 0.10 percent of N, less than or equal to 0.06 percent of Ce, less than or equal to 0.008 percent of P, less than or equal to 0.002 percent of S and the balance of iron and inevitable impurities. The mass relationship of Al and C is that [C] is greater than or equal to lambda1 and less than or equal to lambda2; lambda 1 is equal to 1.53 to 0.07 [Al], and lambda 2 is equal to 1.9 to 0.1 [Al]. The high-toughness light steel plate has the characteristics of high strength, high toughness and light weight at the same time.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a high-strength and tough light-weight steel plate and a preparation method and application thereof. Background technique [0002] With the continuous development of social economy, the massive consumption of energy has brought a series of environmental problems. The solution is to use clean energy instead of fuel power on the one hand, and to reduce fuel consumption and pollution by reducing the weight of transportation equipment on the other hand. Therefore, lightweight transportation equipment has become the future development direction. By adding the lightweight element Al to the steel to reduce the density of the steel, and then adding Mn, C and other elements to stabilize the austenite, the Fe-Mn-Al-C series high-strength and high-toughness austenite-based lightweight steel is obtained. [0003] Compared with the existing high-strength light-weight steel patents, it is foun...

Claims

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Application Information

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IPC IPC(8): C22C38/38C22C38/06C22C38/20C22C38/26C22C38/28C22C33/06C21D8/02C21D1/18
CPCC22C38/38C22C38/06C22C38/20C22C38/26C22C38/28C22C38/005C22C38/001C22C33/06C21D8/0205C21D8/0247C21D8/0226C21D1/18C21D2211/001Y02P10/25
Inventor 刘日平王青峰张新宇胡文俊王子童田野耿路路谯明亮
Owner YANSHAN UNIV