High-strength and large-plasticity high-entropy alloy with martensitic phase transformation and preparation method thereof
A martensitic transformation and high-entropy alloy technology, applied in the field of high-entropy alloys, can solve the problems that new materials need to be further optimized, and achieve the effect of improving toughness and strength, improving work hardening ability and huge application value.
Active Publication Date: 2021-06-15
TAIYUAN UNIV OF TECH
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Problems solved by technology
[0011] Although many researchers have carried out research and development, new materials with a good combination of strength and toughness need to be further optimized
Method used
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Embodiment 1
[0049] (1) Raw materials are prepared, the alloy smelting raw materials adopted are Cr, Co, Ni and Si elements, and the proportioning is carried out accurately according to the molar ratio, which is used for smelting and preparing alloys;
[0050] (2) Purification of pure metals, alloy preparation adopts Cr, Co, Ni and Si as raw materials, and purifies metal surface oxides;
[0051] (3) Using a high-vacuum arc melting furnace under the protection of 99.99% high-purity argon, the raw materials were melted 5 to 8 times to make alloy button ingots and suction-cast into copper molds, that is, the cross-sectional area was successfully smelted into 2mm*10mm A new type of high-entropy alloy plate; the current control during melting is 170-180A, the current control during suction casting is 210-220A, and the arc length is controlled at 25-30mm; see High-entropy alloy plate for vacuum arc melting furnace and suction casting figure 1;
[0052] (4) Cut out a sample of 2mm×10mm×10mm on t...
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Abstract
The invention relates to a high-strength and large-plastic high-entropy alloy with martensitic phase transformation and a preparation method thereof, belonging to the technical field of high-entropy alloys. The high-strength and large-plastic high-entropy alloy with martensitic transformation described in the present invention is composed of Cr, Co, Ni and Si elements, and the molar ratio of the four elements is 1:1:1:x, x=0.1, 0.2,0.3. The purities of the Cr, Co, Ni and Si smelting raw materials are all ≥99.9wt.%. The high-strength and large-plastic high-entropy alloy with martensitic phase transformation described in the present invention has significantly enhanced work hardening ability, excellent strength and plasticity, meets the application requirements for impact energy absorption of materials in modern industry, and has huge applications Potential; simultaneously the present invention provides a kind of simple and convenient preparation method.
Description
technical field [0001] The invention relates to a high-strength and large-plastic high-entropy alloy with martensitic phase transformation and a preparation method thereof, belonging to the technical field of high-entropy alloys. Background technique [0002] Exploring new materials is one of the eternal goals of human beings. As a brand-new research and application field, high-entropy alloy is a new type of alloy with broad application potential. In recent years, the excellent properties of high-entropy alloy materials have led more and more researchers to devote themselves to the development of alloy materials with excellent properties. At present, there have been many high-entropy alloys reported, including NiCoCrFeMn in the FCC system and AlCoCr in the BCC system. 1.5 Fe 1.5 NiT 0.5 , have obtained good mechanical properties. [0003] As we all know, entropy is a physical quantity that expresses the degree of disorder of the system, and its size can affect the thermo...
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IPC IPC(8): C22C30/00C22C1/02C22F1/00
CPCC22C1/02C22C30/00C22F1/00
Inventor常慧张团卫马胜国王志华李志强
OwnerTAIYUAN UNIV OF TECH