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A kind of co-al-w alloy bar and preparation method thereof

An alloy rod, co-al-w technology, applied in the field of Co-Al-W alloy rod and its preparation, can solve the problem of the decline of Co-Al-W alloy mechanical properties, the reduction of material service temperature and reliability, and the impurity Solve problems such as high oxygen mass content, achieve the effect of increasing thrust-to-weight ratio, increasing engine thrust, and low oxygen mass content

Active Publication Date: 2021-04-13
XIAN AEROSPACE XINYU ELECTRICAL & MECHANICAL EQUIP FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, Co-Al-W alloys prepared by traditional methods inevitably form unstable phases with low melting points, which are difficult to eliminate even through high temperature and long-term annealing
In addition, the prepared Co-Al-W alloy will introduce impurities and high oxygen content, which will reduce the mechanical properties of Co-Al-W alloy and reduce the service temperature and reliability of the material.

Method used

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  • A kind of co-al-w alloy bar and preparation method thereof
  • A kind of co-al-w alloy bar and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] The Co-Al-W alloy rod in this embodiment is made of the following raw materials in mass percentage: 9% aluminum, 10% tungsten, and the balance is cobalt and unavoidable impurities.

[0032] The method for preparing Co-Al-W alloy rods in this embodiment comprises the following steps:

[0033] (1) Put aluminum powder, tungsten powder and cobalt powder in a ball mill, use absolute ethanol as a dispersant, and ball mill for 15 hours under the condition that the rotating speed is 250rpm and the ball-to-material ratio is 15:1 by mass ratio. Dry under vacuum conditions to obtain mixed powder; the volume value of the absolute ethanol is 0.6 times the sum of the values ​​of the mass of aluminum powder, tungsten powder and cobalt powder, wherein the unit of volume is mL, and the unit of mass is g; During the drying process under vacuum conditions, the value of the vacuum degree is less than 1×10 -2 Pa, the drying temperature is preferably 95°C, preferably, the mass purity of the...

Embodiment 2

[0039] The Co-Al-W alloy rod in this embodiment is made of the following raw materials in mass percentage: 7% aluminum, 8% tungsten, and the balance is cobalt and unavoidable impurities.

[0040] The method for preparing Co-Al-W alloy rods in this embodiment comprises the following steps:

[0041] (1) Put aluminum powder, tungsten powder and cobalt powder in a ball mill, use absolute ethanol as a dispersant, and ball mill for 10 hours at a speed of 200 rpm and a mass ratio of 10:1. After ball milling, drying under vacuum conditions to obtain the mixed powder; the volume value of the absolute ethanol is 0.5 times the sum of the mass values ​​of the aluminum powder, tungsten powder and cobalt powder, wherein the unit of volume is mL, and the unit of mass is g; During the drying process under vacuum conditions, the value of the vacuum degree is less than 1×10 -2 Pa, the drying temperature is preferably 90°C, preferably, the mass purity of the aluminum powder is not less than 99....

Embodiment 3

[0047] The Co-Al-W alloy rod in this embodiment is made of the following raw materials in mass percentage: 11% aluminum, 12% tungsten, and the balance is cobalt and unavoidable impurities.

[0048] The method for preparing Co-Al-W alloy rods in this embodiment comprises the following steps:

[0049] (1) Put aluminum powder, tungsten powder and cobalt powder in a ball mill, use absolute ethanol as a dispersant, and ball mill for 20 hours at a speed of 300 rpm and a ball-to-material ratio of 20:1 by mass ratio. After ball milling, Dry under vacuum conditions to obtain mixed powder; the volume value of the absolute ethanol is 0.7 times the sum of the mass values ​​of aluminum powder, tungsten powder and cobalt powder, wherein the unit of volume is mL, and the unit of mass is g; During the drying process under vacuum conditions, the value of the vacuum degree is less than 1×10 -2 Pa, the drying temperature is preferably 100°C, preferably, the mass purity of the aluminum powder is...

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Abstract

The invention discloses a Co-Al-W alloy bar and a preparation method thereof. The Co-Al-W alloy bar is composed of the following mass percentages: aluminum 7%-11%, tungsten 8%-12% , and the balance is cobalt. The method of the present invention is specifically (1) drying the raw material powder after ball milling to obtain a mixed powder; (2) pressing and molding to obtain a blank, and sintering to obtain a Co-Al-W alloy sintered body; (3) electron beam smelting to obtain Co ‑Al‑W alloy ingots, cut into semi-finished rods; (4) Co‑Al‑W alloy rods obtained by electron beam regional melting. The Co-Al-W alloy bar of the present invention has the characteristics of high strength at room temperature and high temperature, high purity and low oxygen content, and is a key material for manufacturing advanced aero-engines and industrial gas turbine blades, which can increase the working temperature of aero-engine turbines and increase the thrust weight ratio, increasing engine thrust.

Description

technical field [0001] The invention belongs to the technical field of alloy preparation, and in particular relates to a Co-Al-W alloy rod and a preparation method thereof. Background technique [0002] The development of high-performance aircraft depends on the matching of advanced power systems. The modern engine system not only has a large thrust, but also has an increasing thrust-to-weight ratio. With the improvement of engine thrust and efficiency, the inlet temperature of the engine needs to be continuously increased. Among the engine components, The working conditions of the key parts of the hot end are the most severe, and they must bear high stress in a high temperature and corrosive environment above 1000 ° C, and also require a long service life, which requires the materials of the key parts of the hot end to have high creep resistance and good Corrosion resistance, high high temperature durability, fracture toughness and fatigue properties, etc. The superalloy m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/07C22C1/04C22C1/03
CPCC22C1/03C22C1/0433C22C19/07
Inventor 樊强博王波涛张伟刘雷社王党卫范信江童萌
Owner XIAN AEROSPACE XINYU ELECTRICAL & MECHANICAL EQUIP FACTORY
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