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A method for improving high-temperature friction performance of tungsten-rhenium alloy

A technology of tungsten-rhenium alloy and friction performance, which is applied in the field of improving the high-temperature friction performance of tungsten-rhenium alloy. It can solve the problems of affecting the temperature distribution and transportation performance inside the nozzle, shedding, and the wear of the W-Re alloy material of the nozzle, so as to improve the internal temperature. Distribution and transport properties, prolonging service life, overcoming adverse effects

Active Publication Date: 2021-11-26
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Under such harsh conditions, on the one hand, it is necessary to overcome the adverse effects of strong erosion caused by the loosening of the arc thruster nozzle fasteners themselves; on the other hand, the mechanical friction, erosion and denudation of metal particles produced by high temperature ablation , leading to wear and shedding of the nozzle W-Re alloy material, which ultimately affects the internal temperature distribution and transport performance of the nozzle

Method used

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  • A method for improving high-temperature friction performance of tungsten-rhenium alloy
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  • A method for improving high-temperature friction performance of tungsten-rhenium alloy

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Embodiment 1

[0033] This embodiment includes the following steps:

[0034]Step 1. According to the molar ratio of each element in the target product W-3Re-1HfC tungsten-rhenium alloy, respectively weigh W powder, Re powder and HfC powder, and place them in a planetary high-energy ball mill under the protection of an inert gas for mechanical alloying Chemical treatment, the ball milling jar used by the high energy ball mill is an agate jar, the balls are agate balls, the speed used is 400rpm, the time is 50h, the ball-to-material ratio is 15:1, absolute ethanol is added as a control agent during the high energy ball milling process, and The amount of control agent added is 10% of the total mass of W powder, Re powder and HfC powder. After the high-energy ball mill is finished, use absolute ethanol to clean the ball mill tank 3 times. The quality of the absolute ethanol used for cleaning is W powder, Re powder and HfC powder. 5 times the total mass of the powder, the high-energy ball mill po...

Embodiment 2

[0039] This embodiment includes the following steps:

[0040] Step 1. According to the molar ratio of each element in the target product W-3Re-3HfC tungsten-rhenium alloy, respectively weigh W powder, Re powder and HfC powder, and place them in a planetary high-energy ball mill under the protection of an inert gas for mechanical alloying Chemical treatment, the ball milling jar used by the high energy ball mill is an agate jar, the balls are agate balls, the rotating speed used is 450rpm, the time is 55h, the ball-to-material ratio is 16:1, absolute ethanol is added as a control agent during the high energy ball milling process, and The amount of control agent added is 15% of the total mass of W powder, Re powder and HfC powder. After the high-energy ball mill is finished, use absolute ethanol to clean the ball mill tank 3 times. The quality of the absolute ethanol used for cleaning is W powder, Re powder and HfC powder. 8 times the total mass of the powder, the high-energy ba...

Embodiment 3

[0045] This embodiment includes the following steps:

[0046] Step 1. According to the molar ratio of each element in the target product W-3Re-8HfC tungsten-rhenium alloy, respectively weigh W powder, Re powder and HfC powder, and place them in a planetary high-energy ball mill under the protection of an inert gas for mechanical alloying Chemical treatment, the ball milling jar used by the high energy ball mill is an agate jar, the balls are agate balls, the rotating speed is 500rpm, the time is 60h, the ball-to-material ratio is 18:1, absolute ethanol is added as a control agent during the high energy ball milling process, and The amount of control agent added is 20% of the total mass of W powder, Re powder and HfC powder. After the high-energy ball mill is finished, use absolute ethanol to clean the ball mill tank 3 times. The quality of the absolute ethanol used for cleaning is W powder, Re powder and HfC powder. 10 times the total mass of the powder, the high-energy ball m...

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Abstract

The invention discloses a method for improving the high-temperature friction performance of tungsten-rhenium alloy. The method comprises: 1. Weigh W powder, Re powder and HfC powder respectively according to the target product tungsten-rhenium alloy, and mix them by high-energy ball milling under the protection of inert gas. Alloy powder; 2. Seal the mixed alloy powder and press it to obtain a billet, and then place it in a hydrogen furnace for sintering to obtain a sintered billet; 3. Put the sintered billet into a sheath for sealing welding, and then perform hot isostatic pressing to remove the sheath Then get tungsten-rhenium alloy. The present invention combines high-energy ball milling, cold isostatic pressing, hydrogen sintering and hot isostatic pressing to prepare tungsten-rhenium alloys, effectively removes impurities in raw materials, avoids the formation of softened phases, improves the density of tungsten-rhenium alloys, and avoids the occurrence of HfC agglomeration Porous, give full play to the multi-dimensional strengthening effect of HfC, greatly improve the strength and hardness of tungsten-rhenium alloy, thereby improving the high-temperature friction performance of tungsten-rhenium alloy, prolonging its service life, and reducing the occurrence of engineering accidents.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy / composite materials, and in particular relates to a method for improving the high-temperature friction performance of a tungsten-rhenium alloy. Background technique [0002] Tungsten-rhenium alloy is a high melting point alloy. Due to the addition of rare earth element rhenium, it has a series of excellent properties such as high strength, high recrystallization temperature and low embrittlement transition temperature (DBTT), and its processing performance is improved. Therefore, tungsten-rhenium alloy is suitable for making high-temperature thermocouples and cathode wires, and is used in the field of temperature measurement. In recent years, with the deepening of research, W-Re alloys with optimized composition and preparation process have expanded to its application fields, such as being widely used in electronics, nuclear energy, high-temperature structural materials and other fields....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C27/04B22F3/04B22F3/15B22F3/10
CPCB22F3/04B22F3/1007B22F3/15B22F2999/00C22C1/045C22C27/04B22F2201/013
Inventor 李延超张文林小辉梁静薛建嵘辛甜
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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