High-performance high-entropy alloy and processing method thereof

A high-entropy alloy, high-performance technology, applied in the field of composition design and processing technology of high-performance alloys, can solve problems such as insufficient room temperature strength, and achieve the effects of strong economy, reasonable content and low cost

Active Publication Date: 2017-11-07
深圳市卡德姆科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve Fe 40 mn 40 co 10 Cr 10 Alloys face problems such as insufficient strength at room temperature, and coordinate the relationship between strength and plasticity to provide a high-performance high-entropy alloy and its processing method

Method used

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  • High-performance high-entropy alloy and processing method thereof
  • High-performance high-entropy alloy and processing method thereof
  • High-performance high-entropy alloy and processing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Example 1 (Fe 40 mn 40 co 10 Cr 10 )

[0040] 1) According to the nominal composition (Fe 40 mn 40 co 10 Cr 10 ) 97.8 C 2.2 The composition is batched, with a total mass of about 200g, smelted under a vacuum electric arc furnace, and smelted four times to obtain an as-cast alloy with a grain size of about 100μm;

[0041] 2) Under this method, a single 200g smelting can ensure the uniformity of composition and structure, and the tensile strength of the material is about 650MPa, which meets the service requirements and can be used directly without subsequent treatment;

[0042] The ingot structure of the alloy of this composition after smelting is as follows: figure 1 As shown, the average grain size is about 100 μm, and the tensile curve of the ingot of this composition is shown as figure 2 As shown in C2.2, it can be seen that the carbon-free Fe prepared by the same method 40 mn 40 co 10 Cr 10 Compared with the alloy (curve C0), its strength and plasticity...

Embodiment 2

[0043] Example 2 (Fe 40 mn 40 co 10 Cr 10 )

[0044] 1) According to the nominal composition (Fe 40 mn 40 co 10 Cr 10 ) 96.7 C 3.3 The composition is batched, with a total mass of about 200g, smelted under a vacuum electric arc furnace, and smelted four times to obtain an as-cast alloy with a grain size of about 100μm;

[0045] 2) Under this method, a single 200g smelting can ensure the uniformity of composition and structure, and the tensile strength of the material is about 787MPa, which meets the service requirements and can be used directly without subsequent treatment;

[0046] The ingot structure of the alloy of this composition after smelting is as follows: figure 1 As shown, the average grain size is about 100 μm, and the tensile curve of the ingot of this composition is shown as figure 2 As shown in C3.3, it can be seen that the carbon-free Fe prepared by the same method 40 mn 40 co 10 Cr 10 Compared with the alloy (curve C0), its strength and plastici...

Embodiment 3

[0047] Embodiment 3 (Fe 40 mn 40 co 10 Cr 10 )

[0048] 1) According to the nominal composition (Fe 40 mn 40 co 10 Cr 10 ) 95.6 C 4.4 The composition is batched, with a total mass of about 200g, smelted under a vacuum electric arc furnace, and smelted four times to obtain an as-cast alloy with a grain size of about 100μm;

[0049] 2) Under this method, a single 200g smelting can ensure the uniformity of composition and structure, and the tensile strength of the material is about 836MPa, which meets the service requirements and can be used directly without subsequent treatment;

[0050] The ingot structure of the alloy of this composition after smelting is as follows: figure 1 As shown, the average grain size is about 100 μm, and the tensile curve of the ingot of this composition is shown as figure 2 As shown in C4.4, it can be seen that the carbon-free Fe prepared by the same method 40 mn 40 co 10 Cr 10 Compared with the alloy (curve C0), its strength and plast...

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Abstract

The invention discloses a high-performance high-entropy alloy and a processing method thereof. Certain content of an element carbon is added into a Fe40Mn40Co10Cr10 alloy to form an interstitial solid solution with a basal body, so that stacking fault energy of the material can be effectively reduced, twin crystals can be induced under the room-temperature condition, and extra strength increment is provided for the basal body by performing solid solution and separating carbides through the element carbon. The element carbon is used as a good interstitial atom and the carbide is used as an effective precipitation strength phase; heat preservation is performed for a relatively long time at a relatively high temperature in the last step, an as-forged microstructure is partly or completely eliminated, and part of the precipitated phase is dissolved to form a nearly single phase structure, so that the alloy has relatively great performance controllable space again on the basis of higher performance level, further strengthening is favorably performed through other strengthening ways such as deformation strengthening and precipitation strengthening to obtain more reasonable strength and plasticity match; and moreover, content of overall alloy elements is reasonable, cost is low, and economical efficiency is relatively strong.

Description

【Technical field】 [0001] The invention belongs to the field of composition design and processing technology of high-performance alloys, and designs a high-performance high-entropy alloy and a processing method thereof. 【Background technique】 [0002] High-entropy alloys are a class of alloys based on new alloy design concepts proposed by Ye Junwei in 2004. These alloys generally contain five or more alloying elements (now there are also four elements), and the content of each element is equal. Above 5%, there is no obvious dominant element, and the structure is generally single-phase FCC or BCC, and sometimes a mixed structure appears. Due to its strong solid solution effect, high-entropy alloys have high strength, thermal stability, wear resistance and corrosion resistance, and have received extensive attention and research since they were proposed, and are considered as a potential structural material. [0003] However, some high-entropy alloy systems, such as Fe 40 mn ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02C22F1/16
CPCC22C1/02C22C30/00C22F1/16
Inventor 江峰陈良斌唐可杨中岳吴亚科孙军
Owner 深圳市卡德姆科技有限公司
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