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A casting alloy with high hardness and high specific yield strength under high temperature conditions and preparation method thereof

A yield strength, cast alloy technology, applied in the field of alloys, can solve the problems of poor resistance to high temperature softening ability, low high temperature hardness, low density, etc., and achieve the effect of high interface bonding strength, prominent high temperature hardness, and high preparation method

Active Publication Date: 2022-07-29
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to propose a Ni-based superalloy with high hardness under high temperature conditions, which has low hardness at high temperatures above 650°C, low high temperature specific yield strength, poor high temperature softening resistance, and inability to meet high temperature service requirements. , A casting alloy with high specific yield strength, which has the characteristics of low density (about 22% lower than that of Ni-based superalloy), high high-temperature hardness, high high-temperature specific yield strength, and good high-temperature softening ability

Method used

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  • A casting alloy with high hardness and high specific yield strength under high temperature conditions and preparation method thereof
  • A casting alloy with high hardness and high specific yield strength under high temperature conditions and preparation method thereof
  • A casting alloy with high hardness and high specific yield strength under high temperature conditions and preparation method thereof

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Embodiment 1

[0028] This embodiment discloses a casting alloy with high hardness and high specific yield strength under high temperature conditions, including the following components in molar ratio: Al: 19 parts; Ti: 18 parts; Ni: 37 parts; Cr: 26 parts . The Al, Ti, Ni, and Cr are all industrial-grade pure raw materials with a purity of more than 99.5 wt.%.

[0029] The preparation method of the cast alloy with high hardness and high specific yield strength under the high temperature condition of this embodiment is as follows: when the alloy is melted, Al is placed at the bottom, Ti and Cr are placed in the middle, Ni is placed on the top, and the furnace lid is closed, Tighten the lock, evacuate to below 10Pa, open the molecular pump to evacuate to 3×10 -3 Below Pa, fill with argon to (3~5)×10 2 Pa, turn on the heating power switch, slowly manually adjust the "power adjustment" knob (rotate clockwise, the rate of 5kW / 10min will increase), after the raw material is melted, slowly manua...

Embodiment 2

[0035] This embodiment discloses a casting alloy with high hardness and high specific yield strength under high temperature conditions, including the following components in molar ratio: Al: 17 parts; Ti: 17 parts; Ni: 34 parts; Cr: 12 parts ; V: 22 copies. The Al, Ti, Ni, Cr, and V are all industrial-grade pure raw materials with a purity of more than 99.5 wt.%.

[0036] The preparation method of the cast alloy with high hardness and high specific yield strength under the high temperature condition of this example is as follows: when the alloy is melted, Al is placed at the bottom, Ti, Cr and V are placed in the middle, Ni is placed at the top, and the furnace is closed. Cover, lock the lock, evacuate to below 10Pa, open the molecular pump to evacuate to 3×10 -3 Below Pa, fill with argon to (3~5)×10 2 Pa, turn on the heating power switch, slowly manually adjust the "power adjustment" knob (rotate clockwise, the rate of 5kW / 10min will increase), after the raw material is mel...

Embodiment 3

[0039] This embodiment discloses a casting alloy with high hardness and high specific yield strength under high temperature conditions, including the following components in molar ratio: Al: 17 parts; Ti: 17 parts; Ni: 34 parts; V: 32 parts . The Al, Ti, Ni, and V are all selected from industrial-grade pure raw materials with a purity of more than 99.5 wt.%.

[0040] The preparation method of the cast alloy with high hardness and high specific yield strength under the high temperature condition of this example is as follows: when the alloy is melted, Al is placed at the bottom, Ti and V are placed in the middle, Ni is placed on the top, and the furnace lid is closed, Tighten the lock, evacuate to below 10Pa, open the molecular pump to evacuate to 3×10 -3 Below Pa, fill with argon to (3~5)×10 2 Pa, turn on the heating power switch, slowly manually adjust the "power adjustment" knob (rotate clockwise, the rate of 5kW / 10min will increase), after the raw material is melted, slow...

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Abstract

The invention provides a casting alloy with high hardness and high specific yield strength under high temperature conditions and a preparation method thereof. The casting alloy with high hardness and high specific yield strength under high temperature conditions comprises the following components in molar ratio: Ni34 ‑40 copies; Cr15‑28 copies; V22‑36 copies; Al16‑20 copies; Ti16‑20 copies. The invention also discloses a method for preparing a casting alloy with high hardness and high specific yield strength under high temperature conditions. Cast alloys with high, specific yield strength. The casting alloy of the invention has the characteristics of low density (about 22% lower than Ni-based superalloy), high high temperature hardness, high high temperature specific yield strength and good high temperature softening resistance.

Description

technical field [0001] The invention relates to alloy technology, in particular to a casting alloy with high hardness and high specific yield strength under high temperature conditions and a preparation method thereof. Background technique [0002] Superalloy materials are important key strategic materials and typical military-civilian fusion materials. Their quality and performance directly affect or even determine the performance of advanced equipment such as aerospace, ships, and electricity. my country's superalloy materials have experienced a development process from scratch, from small to large, and also experienced different development stages from tracking imitation, improvement and modification to independent innovation and development. However, at present, the performance level of superalloys in my country is still low, the quality stability is poor, the cost is high, and the independent guarantee ability is poor. More than 40% of superalloys rely on imports, and s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02
CPCC22C30/00C22C1/02
Inventor 王明亮卢一平王同敏李廷举曹志强
Owner DALIAN UNIV OF TECH
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