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A kind of multi-principal superalloy and preparation method thereof

A high-temperature alloy, multi-principal technology, used in metal processing equipment, transportation and packaging, etc., can solve problems such as residual organic components, and achieve the effects of reducing impurity hazards, fine grain size, and optimizing process parameters and operations.

Active Publication Date: 2021-11-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some organic components will inevitably remain

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A multi-principal superalloy whose composition is (NbMoTaW) 22.6 (Ti 8 Al 0.6 Zr 1). The method adopts the technology combining the chemical mechanical alloying method and the low oxygen content process, and the steps are as follows:

[0026] 1) Prepare alloy powder by mechanical alloying method: 8% Ti powder, 0.6% Al powder, 1% Zr powder, 22.6% Nb powder, 22.6% Mo powder, 22.6% Ta powder and 22.6% W powder are mixed according to the atomic percentage of the element Obtain mixed powder evenly, wherein the purity of each powder is 99.5-99.95wt%. After the powder filling is completed, the ball mill tank is repeatedly evacuated at intervals and filled with argon protective gas;

[0027] 2) Add the mixed powder, balls and control agent into the ball mill tank of the planetary high-energy ball mill for ball milling, wherein the control agent uses ethanol (analytical grade), the grinding tank is a cemented carbide cylinder, and the ball milling medium is a cemented carbid...

Embodiment 2

[0039] A multi-principal superalloy whose composition is (NbMoTaW) 21 (Ti 11 Al 1 Zr 2 ). The method adopts the technology combining the chemical mechanical alloying method and the low oxygen content process, and the steps are as follows:

[0040] 1) Prepare alloy powder by mechanical alloying method: 11% Ti powder, 1% Al powder, 2% Zr powder, 21% Nb powder, 21% Mo powder, 21% Ta powder and 21% W powder are mixed according to the atomic percentage of the element Obtain mixed powder evenly, wherein the purity of each powder is 99.5-99.95wt%. After the powder filling is completed, the ball mill tank is repeatedly evacuated at intervals and filled with argon protective gas;

[0041] 2) Add the mixed powder, balls and control agent into the ball mill tank of the planetary high-energy ball mill for ball milling, wherein the control agent uses ethanol (analytical grade), the grinding tank is a cemented carbide cylinder, and the ball milling medium is a cemented carbide ball. Th...

Embodiment 3

[0053] A multi-principal superalloy whose composition is (NbMoTaW) 18 (Ti 18 Al 5 Zr 5 ). The method adopts the technology combining the chemical mechanical alloying method and the low oxygen content process, and the steps are as follows:

[0054] 1) Prepare alloy powder by chemical mechanical alloying method: 18% Ti powder, 5% Al powder, 5% Zr powder, 18% Nb powder, 18% Mo powder, 18% Ta powder and 18% W powder according to atomic percentage Mix evenly to obtain mixed powder, wherein the purity of each powder is 99.5-99.95wt%. After the powder filling is completed, the ball mill tank is repeatedly evacuated at intervals and filled with argon protective gas;

[0055] 2) Add the mixed powder, balls and control agent into the ball mill tank of the planetary high-energy ball mill for ball milling, wherein the control agent uses ethanol (analytical grade), the grinding tank is a cemented carbide cylinder, and the ball milling medium is a cemented carbide ball. The ball-to-mat...

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Abstract

The invention discloses a multi-principal high-temperature alloy and a preparation method thereof. The present invention is based on the preparation method of mechanical alloying and solid-state sintering technology, mainly in the four elements of NbMoTaW, adding Ti to increase the plasticity of the alloy system, and adding a small amount of Al and Zr at the same time to control the content of oxygen and nitrogen impurities in the alloy system , so that the oxygen, nitrogen, carbon and other impurity elements brought in from the raw materials and process control agents actively form Ti(CN), Al 2 o 3 , ZrN and other high-melting-point hard phase particles eliminate the harm of impurity elements on the performance of alloys prepared by mechanical alloying, and also have a certain dispersion enhancement effect. The invention has the advantages of simple preparation process, fast material forming speed, uniform matrix structure of the prepared alloy, low oxygen and nitrogen impurity content, high density, fine crystal grains, better effect of fine grain strengthening and strengthening phase strengthening, and higher ductility.

Description

technical field [0001] The invention belongs to metal materials and its preparation technology, in particular to a multi-principal superalloy and its preparation method. Background technique [0002] High-entropy alloys (HEAs), which contain at least 4–5 major elements in equal or nearly equal atomic concentrations, have recently attracted considerable attention due to their outstanding physical and thermal properties. Refractory HEA (RHEA) has been reported to exhibit excellent strength at high temperature and room temperature. Among them, the choice of superalloy elements is very wide, generally including Cr, Hf, Mo, Nb, Ta, Ti, V, W, Zr and Ir, Os, Re, Rh, Ru. In terms of preparation technology, there are many applications at present, and the methods with relatively mature technology include vacuum arc melting method and mechanical alloying method. In 2010, Senkov et al. used the vacuum arc melting method to study for the first time a multi-principal superalloy based o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/04B22F9/04B22F1/00B22F3/105C22C1/05C22C32/00
CPCC22C30/00C22C1/045B22F9/04B22F3/105C22C1/058C22C32/00B22F2009/043B22F2009/041B22F2003/1051B22F2998/10B22F1/142
Inventor 戴挺郭魏贾晓健
Owner SOUTHEAST UNIV