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High-manganese austenitic steel and preparation method thereof

A technology of austenitic steel and high manganese is applied in the field of high manganese austenitic steel and its preparation, which can solve the problems of unsatisfactory, low yield strength and tensile strength, etc.

Pending Publication Date: 2020-10-30
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing technologies such as: "The Effect of Solution Treatment on the Microstructure and Mechanical Properties of Lightweight High Manganese Steel" (Li Junpeng, Du Xin, Cui Ye, Zhang Yang, Zhang Jing, Zhang Zhongwu, 2018,43(07):109-114, "Metal Heat Treatment") prepared 10.31Al-14.85Mn-0.78C-4.93Ni-0.83Cu high manganese steel has an elastic modulus of 142GPa, a yield strength of 506.91MPa, and a tensile strength of 834.50MPa. The yield strength and tensile strength lower; and "a Fe-Mn-Al-C low-density high-strength steel structure and performance research" (Zhao Chao, Song Renbo, Zhang Leifeng, Yang Fuqiang, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083) prepared Fe -Although the yield strength and tensile strength of Mn-Al-C steel are high, the density is 6.8g / cm 3 , is still high, and has gradually been unable to meet the requirements of social development for the new system Fe-Mn-Al-C steel

Method used

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  • High-manganese austenitic steel and preparation method thereof
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  • High-manganese austenitic steel and preparation method thereof

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preparation example Construction

[0031] The present invention also provides a method for preparing high manganese austenitic steel described in the above technical solution, comprising the following steps:

[0032] (1) smelting after mixing alloy raw materials to obtain alloy ingots;

[0033] (2) hot rolling the alloy ingot obtained in the step (1) to obtain an alloy plate;

[0034] (3) The alloy plate obtained in the step (2) is sequentially subjected to solution treatment and aging treatment to obtain high manganese austenitic steel.

[0035] The invention mixes and smelts alloy raw materials to obtain alloy ingots.

[0036] In the present invention, there is no special limitation on the type of the alloy raw material, and the raw material known to those skilled in the art that can provide the above alloy elements can be used. In the present invention, the alloy raw material is preferably carbon, electrolytic manganese sheet, niobium wire, aluminum block and iron block, more preferably carbon, electrolyti...

Embodiment 1

[0061] In terms of mass percentage, the composition of high manganese austenitic steel is: Mn: 25%, Al: 10%, C: 1.4%, Nb: 0.05% and the balance is Fe.

[0062] The preparation method of high manganese austenitic steel is:

[0063] (1) Take 87.492g of industrial pure iron, 34.664g of electrolytic manganese, 13.865g of pure aluminum, and 0.069g of niobium wire and immerse them in an anhydrous ethanol beaker, put the beaker into an ultrasonic cleaner for cleaning, add 1.941g of carbon, and Put carbon, electrolytic manganese sheet, niobium wire, aluminum block, and industrial pure iron into the water-cooled copper crucible of the non-consumable vacuum arc melting furnace, and the vacuum degree in the furnace cavity must reach 8×10 - 3 Below Pa, fill it with high-purity argon as a protective gas and then smelt it. After each smelting, the ingot is turned over, and the ingot is smelted and turned over repeatedly to obtain an alloy ingot with a thickness of 14.7mm;

[0064] (2) Hea...

Embodiment 2

[0070] In terms of mass percentage, the composition of high manganese austenitic steel is: Mn: 26%, Al: 10%, C: 1.4%, Nb: 0.1% and the balance is Fe.

[0071] The preparation method of high manganese austenitic steel is:

[0072] (1) Take 88.046g of industrial pure iron, 36.628g of electrolytic manganese, 14.088g of pure aluminum, and 0.141g of niobium wire and immerse them in an anhydrous ethanol beaker. After cleaning the beaker in an ultrasonic cleaner, add 1.972g of carbon, and then Put carbon, electrolytic manganese sheet, niobium wire, aluminum block, and industrial pure iron into the water-cooled copper crucible of the non-consumable vacuum arc melting furnace, and the vacuum degree in the furnace cavity must reach 8×10 - 3 Below Pa, fill it with high-purity argon as a protective gas and then smelt it. After each smelting, the ingot is turned over, and the ingot is smelted and turned over repeatedly to obtain an alloy ingot with a thickness of 14.7mm;

[0073] (2) Hea...

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Abstract

The invention provides high-manganese austenitic steel and a preparation method thereof, and belongs to the technical field of metal materials. The high-manganese austenitic steel provided by the invention is prepared from the following components in percentage, by mass, 25 to 27 percent of Mn, 8 to 12 percent of Al, 1.2 to 1.4 percent of C, 0.05 to 0.1 percent of Nb and the balance of Fe. By adjusting the using amounts of Al, C and Mn, the density of the steel can be reduced, the stability and restoring force of austenite are improved, meanwhile, the solid solution strengthening effect is achieved, and the strength and abrasion resistance of the steel are improved; and the Nb element reduces network carbide in an as-cast structure, austenite grains are refined, and the yield strength is improved; and the result of the embodiment shows that the density of the high-manganese austenitic steel is about 6.62 g / cm < 3 > and is reduced by 15.13% compared with that of pure iron, the elastic modulus is larger than or equal to 142 GPa, the yield strength is larger than 1020 MPa, and the tensile strength is larger than 1150 MPa.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a high manganese austenitic steel and a preparation method thereof. Background technique [0002] Steel is widely used in all walks of life. With the development of science and technology, people's requirements for steel performance are also increasing. Among them, one of the most concerned focuses is the issue of lightweight. From the perspective of material selection, there are currently two main ways to achieve lightweight: one is to use lightweight materials, such as the use of low-density aluminum and aluminum alloys, magnesium and magnesium alloys, engineering plastics or carbon fiber composite materials, etc., mainly aluminum Alloy-based; the second is to use high-strength steel instead of ordinary steel to reduce the thickness of the steel plate. Due to factors such as high cost of aluminum alloy, complicated process, and poor welding performance, its application...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/06C22C38/12C21D1/18C21D6/00C21D8/02C21D9/00
CPCC21D1/18C21D6/005C21D8/0226C21D9/0081C22C38/04C22C38/06C22C38/12
Inventor 刘日平张国峰王锁涛王飞唐轶浩景勤马明臻张新宇
Owner YANSHAN UNIV
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