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A kind of multi-principal laves-based intermetallic compound and preparation method thereof

A base metal and compound technology, applied in the field of multi-principal Laves base intermetallic compounds and their preparation, can solve problems such as inability to meet, and achieve the effects of high hardness and good high temperature aging strengthening effect

Active Publication Date: 2017-10-24
菏泽市金沃泰化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the performance of existing multi-principal high-entropy alloys still cannot meet the needs and applications in the field of high-temperature structural materials, the present invention provides a multi-principal Laves-based intermetallic compound and a preparation method thereof, whose constituent elements are FeCoNiCr x Zr, the main phase is Laves intermetallic compound, or a solid solution containing a small amount of bcc structure on the Laves phase matrix. The multi-principal Laves-based intermetallic compound of the present invention has good heat resistance and hardness, and can be applied in industry close to 1100 ℃ high temperature structural materials field

Method used

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  • A kind of multi-principal laves-based intermetallic compound and preparation method thereof
  • A kind of multi-principal laves-based intermetallic compound and preparation method thereof
  • A kind of multi-principal laves-based intermetallic compound and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] A multi-principal Laves-based intermetallic compound whose main component is FeCoNiCr x Zr, in this example, the electric arc furnace smelting method is used to prepare FeCoNiCrZr (the molar ratio of Fe, Co, Ni, Cr and Zr is 1:1:1:1:1) Laves-based intermetallic compound, the selected Fe, Co, Ni The purity of the Cr and Zr raw materials are all ≥ 99%. The raw materials are cut from the base metal, and the oxide skin on the surface of the raw metal is removed by mechanical grinding, and then the Laves-based intermetallic compound in this embodiment is converted by the designed molar ratio For the weight ratio, use an electronic balance with an induction capacity of 0.1 mg to weigh the raw materials and mix them evenly. Subsequently, the mixed raw materials were placed in the copper crucible in the WK non-consumable vacuum electric arc furnace developed by Shenyang Vacuum Technology Research Institute, and the furnace body was evacuated. When the vacuum degree reached 5×10...

Embodiment 2

[0042] A multi-principal Laves-based intermetallic compound whose main component is FeCoNiCr x Zr, two Laves-based intermetallic compounds are prefabricated in this example, which are respectively denoted as FeCoNiCr 0.75 Zr (the molar ratio of Fe, Co, Ni, Cr and Zr is 1:1:1:0.75:1) and FeCoNiCr 0.5 Zr (the molar ratio of Fe, Co, Ni, Cr and Zr is 1:1:1:0.5:1). The intermetallic compound is prepared by electric arc furnace smelting method, and the purity of the selected Fe, Co, Ni, Cr and Zr raw materials are all ≥99%. The two Laves-based intermetallic compounds in this example were converted from the designed molar ratio to the weight ratio, and the raw materials were weighed by an electronic balance with an induction capacity of 0.1 mg, and mixed uniformly. Subsequently, the mixed raw materials were placed in the copper crucible in the WK non-consumable vacuum electric arc furnace developed by Shenyang Vacuum Technology Research Institute, and the furnace body was evacuated...

Embodiment 3

[0049] Same as Example 1, the difference is: the melting current is set to 250±30A, and the melting time is 30s. After the melting is uniformly cooled, the alloy block is turned over and repeated for smelting, and this is repeated 8 times to ensure that all elements of the alloy are evenly smelted. Finally, vacuum suction casting equipment is used to cast the smelted raw materials into ingots solidified on water-cooled copper molds to obtain solidified samples. The solidified samples were respectively kept in a vacuum resistance furnace at 650°C, 800°C, 950°C and 1100°C for 2 hours and then air-cooled. Subsequently, X-ray diffractometer, optical microscope, scanning electron microscope and microhardness tester were used to detect the metallographic and properties of the material. The results showed that the intensity of the Laves phase diffraction peak of FeCoNiCrZr prepared under the conditions of this example was significantly higher than that of The bcc solid solution phase...

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Abstract

The invention discloses a multi-principal Laves-based intermetallic compound and a preparation method thereof, belonging to the field of alloy material design. The composition element of the present invention is FeCoNiCrxZr, and the value range of x is 0.5~1, adopts electric arc furnace smelting method to smelt and then heat treatment obtains multi-principal Laves-based intermetallic compound, and its main phase is Laves intermetallic compound, or in The Laves phase matrix contains a small amount of solid solution with bcc structure. The high entropy effect and topological density structure characteristics of the multi-principal Laves phase make it have extremely high hardness, structural stability and temper softening resistance, and also have good high temperature aging strengthening. The effect can be applied to the field of industrial high-temperature structural materials below 1100 °C.

Description

technical field [0001] The invention belongs to the field of alloy material design, and more specifically relates to a multi-principal Laves-based intermetallic compound and a preparation method thereof. Background technique [0002] AB 2 The expected service temperature of Laves-type intermetallic compounds is between that of nickel-based superalloys and engineering ceramics. It also has good application prospects in the fields of hydrogen storage and electromagnetic materials. At present, the development of Laves phase is mainly concentrated in the field of binary and ternary alloys, and the composition is all based on a single element, that is, the content of a single element is generally greater than 50%, and the typical composition mainly includes NbCr 2 、TiCr 2 、ZrCr 2 、ZrCo 2 , ZrNi 2 、Zr(Cr,Fe) 2 Wait. [0003] The Chinese patent application date is November 9, 2000, and the patent application document with the application publication number CN 1353204A discl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02
Inventor 张晖李维火
Owner 菏泽市金沃泰化工有限公司
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