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High-toughness medium entropy high temperature alloy and preparing method thereof

A high-strength toughness, high-temperature alloy technology, applied in the field of medium-entropy high-temperature alloys, can solve problems such as insufficient strength, achieve the effects of less internal defects, improve oxidation resistance, and improve thermal processing performance

Active Publication Date: 2020-08-07
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of insufficient strength faced by CrCoNi medium entropy alloys, negotiate the relationship between strength and plasticity, and provide a high-strength toughness medium-entropy superalloy and its preparation method

Method used

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  • High-toughness medium entropy high temperature alloy and preparing method thereof
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  • High-toughness medium entropy high temperature alloy and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] According to the ingredients shown in alloys 1 to 3 in Table 1, weigh Cr, Co, Ni, Al, Ti, Ta, B, Zr, C, RE raw materials, put them into a 50kg vacuum induction melting furnace for melting, and refine at high temperature For 15 minutes, the refining temperature was 1650°C, and cast into an alloy ingot; the alloy ingot was forged into an electrode rod at a temperature of 800°C, and the forging ratio was 3. Then remelt in a vacuum electric arc furnace to crystallize into a remelted alloy ingot; the remelted alloy ingot is forged at a forging temperature of 800°C, and the blank is forged into an alloy billet 1 with a forging ratio of 3. After surface grinding and defect detection, alloy billet 1 was forged at 800°C to alloy billet 2 with a forging ratio of 5. Round into a square billet 3, the alloy billet 3 is tempered at 800°C for 30 minutes, and rounded into an alloy rod at a forging ratio of 1. The alloy bar is firstly subjected to solid solution heat treatment. The pro...

Embodiment 2

[0045] According to the ingredients shown in the alloys 4 to 6 in Table 1, weigh Cr, Co, Ni, Al, Ti, Ta, B, Zr, C, RE raw materials, put them into a 50kg vacuum induction melting furnace for melting, and refine at high temperature For 30 minutes, the refining temperature was 1550°C, and cast into alloy ingots; the alloy ingots were forged into electrode rods at a temperature of 1250°C, and the forging ratio was 5. Then remelt in a vacuum electric arc furnace to crystallize into a remelted alloy ingot; the remelted alloy ingot is forged at a forging temperature of 1250°C, and the blank is forged into an alloy billet 1 with a forging ratio of 5. After surface grinding and defect detection, alloy billet 1 was forged at 1250°C to alloy billet 2 with a forging ratio of 8. Alloy billet 2 was then tempered at 1250°C for 25 minutes. Round into a square billet 3, the alloy billet 3 is tempered at 1250°C for 25 minutes, and rounded into an alloy rod at a forging ratio of 5. The alloy b...

Embodiment 3

[0049] According to the ingredients shown in alloys 7-9 in Table 1, weigh Cr, Co, Ni, Al, Ti, Ta, B, Zr, C, RE raw materials, put them into a 50kg vacuum induction melting furnace for melting, and refine at high temperature For 25 minutes, the refining temperature was 1600°C, and cast into an alloy ingot; the alloy ingot was forged into an electrode rod at a temperature of 1150°C, and the forging ratio was 4. Then remelt in a vacuum electric arc furnace to crystallize into a remelted alloy ingot; the remelted alloy ingot is forged at a forging temperature of 1150°C, and the blank is forged into an alloy billet 1 with a forging ratio of 4. After surface grinding and flaw detection, alloy billet 1 was forged at 1150°C to alloy billet 2 with a forging ratio of 6. Alloy billet 2 was then tempered at 1150°C for 28 minutes. Round into a square billet 3, the alloy billet 3 is tempered at 1150°C for 28 minutes, and rounded into an alloy rod at a forging ratio of 3. The alloy bar is f...

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Abstract

The invention discloses a high-toughness medium entropy high temperature alloy and a preparing method thereof. The alloy comprises chemical components including, by weight percent, 28.5 to 32.5% of Cr, 31.5 to 33.4% of Co, 32 to 35% of Ni, 0.5 to 6% of Al, 0 to 6% of Ti, 0 to 3% of Ta, 0.02 to 0.12% of C, 0.002 to 0.015% of B, 0.005 to 0.12% of Zr, 0.005 to 0.15% of RE, and larger than or equal to2% and smaller than or equal to 6% of Al+Ti+Ta, wherein Re is one of Ce, La and Y. The preparing method of the alloy comprises the steps that the raw materials are burdened and smelted according to the proportion, an electrode bar is forged and subjected to remelting, forging is carried out, an alloy bar is prepared, and the alloy bar is subjected to solid solution and aging heat treatment. The alloy is provided with a reasonable component ratio, a wide heat machining window and a heat processing system, the prepared alloy bar has the higher temperature strength, good heat machining and oxidation resistance properties, and the alloy is a candidate material of aero-engine and industrial gas turbine heat end parts.

Description

technical field [0001] The invention belongs to the technical field of medium-entropy high-temperature alloys, and relates to a high-strength and toughness medium-entropy high-temperature alloy and a preparation method thereof. Background technique [0002] High-entropy alloy is a new type of alloy material developed in recent years that is different from traditional alloys. It is composed of 5 to 13 main elements, and the constituent elements have equal or approximately equal atomic ratios. After the solidification of multi-principal high-entropy alloys, complex intermetallic compounds will not be formed, but simple FCC or BCC solid solutions will be formed. High-entropy alloys have thermodynamic high-entropy effects, structural lattice distortion effects, kinetic hysteretic diffusion effects, and performance cocktail effects. Utilizing these effects and rationally designing the composition of the alloy, good comprehensive properties such as high hardness, high strength, g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C22C1/02C22F1/00
CPCC22C1/02C22C19/053C22C19/07C22C30/00C22F1/00
Inventor 安宁孙亚楠惠希东田建军李振瑞
Owner UNIV OF SCI & TECH BEIJING
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