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A low-density high-manganese steel with high strength and plasticity

A technology of low-density steel and high-strength plastic product, which is applied in the direction of improving process efficiency, can solve problems such as unsatisfactory requirements, and achieve the effects of reducing cooling intensity, preventing lamellar tearing, and increasing nucleation cores

Inactive Publication Date: 2019-08-30
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its strong plasticity is only 40GPa·%, which cannot meet the future demand of the market.

Method used

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  • A low-density high-manganese steel with high strength and plasticity

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Experimental program
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Effect test

Embodiment 1

[0039] A low-density high-manganese steel with high strength and plastic product in this embodiment, the chemical composition mass percentage of the low-density steel is: Mn: 19.4%, Al: 9.82%, C: 0.99%, P: 0.003%, S: 0.003 %, the rest are Fe and other unavoidable impurities, and the sum of the mass percentages of Mn and Al in the low-density steel>28%, which is 29.22% in this embodiment; and the mass percentage of Mn in the low-density steel is 19.40~20% %, the mass ratio of Mn to Al is 1.8 to 2.0, the mass percentage of Mn in this embodiment is 19.4%, and the mass ratio of Mn to Al is 1.98; in addition, it is worth noting that Al and C The mass ratio is 9.5-10.5, and it is 9.9 in this embodiment. The production steps are as follows:

[0040] Step (1) smelting: use low-carbon Mn-Fe as the matrix, add Al-Fe alloy and carbon powder, smelt through the vacuum induction melting furnace according to the required ratio, and pass argon gas into the furnace during the smelting process...

Embodiment 2

[0048] A low-density high-manganese steel with high strength and plastic product in this embodiment, the chemical composition mass percentage of the low-density steel is: Mn: 19.00%, Al: 9.80%, C: 0.98%, P: 0.003%, S: 0.003 %, the rest are Fe and other unavoidable impurities, and the ratio of raw materials and the preparation method are basically the same as in Example 1. Then the tensile strength, elongation after fracture and strong-plastic product of the low-density steel were tested, and the test results were recorded in Table 1.

Embodiment 3

[0050] A low-density high-manganese steel with high strength and plastic product in this embodiment, the chemical composition mass percentage of the low-density steel is: Mn: 19.8%, Al: 9.97%, C: 1%, P: 0.003%, S: 0.003 %, the rest are Fe and other unavoidable impurities, and the ratio of raw materials and the preparation method are basically the same as in Example 1. Then the tensile strength, elongation after fracture and strong-plastic product of the low-density steel were tested, and the test results were recorded in Table 1.

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Abstract

The invention provides low-density high manganese steel with high product of strength and elongation, and belongs to the field of low-density steel. The sum of the mass percents of Mn and Al in low-density steel exceeds 28%. The low-density high manganese steel is prepared through the following steps: smelting, namely, smelting on the basis of the alloy component system; casting; hot rolling, namely, heating a casting blank to be 1150-1250 DEG C; maintaining the temperature; then performing hot rolling at least twice; performing solution treatment, namely, maintaining the temperature of 1000-1100 DEG C of the casting blank, and then quenching; cold rolling, namely, performing cold rolling on the obtained low-density steel at least twice; annealing and then cooling to obtain the low-densitysteel. According to the low-density high manganese steel with high product of strength and elongation, a certain amount of Al is added to the steel, and the alloy component and the processing technology are adjusted, so as to obtain Fe-Mn-Al-C series low-density steel; the low-density steel is of an appearance of an austenite, ferrite and k carbide multi-phase structure, so that the low-density steel is high in strength and high in plasticity.

Description

technical field [0001] The invention belongs to the field of low-density steel, and more specifically relates to a low-density high-manganese steel with high strength and plasticity. Background technique [0002] With the increasingly serious problems of resources, energy and the environment, the rise of people's awareness of environmental protection and the objective requirements of sustainable development strategies, automobile lightweight has become the future development trend. There are two main ways to achieve lightweight automobiles: one is to choose lightweight materials, such as low-density aluminum and aluminum alloys, magnesium and magnesium alloys, engineering plastics or carbon fiber composite materials, mainly aluminum alloys; It uses high-strength steel plates instead of ordinary steel plates, and reduces the thickness of steel plates to achieve light weight, mainly including martensitic steel, CP steel, TRIP steel, TWIP steel, DP steel, etc. On this basis, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/06C22C33/04C21D8/02B22D27/02B22D7/00
CPCY02P10/20
Inventor 施琦黄贞益章小峰侯清宇王萍
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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