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Preparation method of high-performance tungsten-rhenium alloy heating wire

A technology of tungsten-rhenium alloy and heating wire, applied in heat treatment equipment, heat treatment furnace, manufacturing tools, etc., can solve the problems of brittle fracture, easy splitting of wire material, large dispersion of meter resistance, etc., to ensure uniformity and improve compactness and mechanical properties, the effect of preventing missed detection

Active Publication Date: 2020-12-25
CHONGQING MATERIALS RES INST
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Problems solved by technology

[0003] In view of the application requirements and the existing quality problems such as easy splitting and brittle fracture of the wire, researchers mainly add elements such as silicon, aluminum, and potassium to improve the recrystallization temperature and shock resistance of the alloy, but the processing of the alloy wire and the After high temperature treatment, the phenomena of splitting and brittle fracture are still serious, and the resistance of meters is scattered, which seriously affects the application of tungsten-rhenium alloy wire.

Method used

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  • Preparation method of high-performance tungsten-rhenium alloy heating wire
  • Preparation method of high-performance tungsten-rhenium alloy heating wire
  • Preparation method of high-performance tungsten-rhenium alloy heating wire

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preparation example Construction

[0035] Such as Figure 1 to Figure 4 Shown, a kind of preparation method of high-performance tungsten-rhenium alloy heating wire comprises the following steps:

[0036] 1) The weight percent content of each component in the high-performance tungsten-rhenium alloy heating wire: rhenium is 3% to 26%, rare earth element is 0.03% to 0.20%, and the balance is tungsten;

[0037] Among them, the rhenium element is ammonium perrhenate, and the rare earth element is the nitrate of the corresponding element;

[0038] The rare earth element in step 1) is one or both of lanthanum and / or cerium.

[0039] 2) Preparation of rare earth ammonium rhenate: Dissolve ammonium perrhenate and nitrate in deionized water according to the components and substances in the high-performance tungsten-rhenium alloy heating wire described in step 1), and stir and heat until crystallization produces powder Finally, evaporate the water to dryness, put the powder into an oven at 50-60°C and dry for 36-72 hour...

Embodiment 1

[0061] Embodiment 1: weigh 2.6 grams of La (NO 3 ) 3 ·6H 2 O and 300 g NH 4 ReO 4 , completely dissolved in 800ml of deionized water, continue to heat and stir to condense into a fine powder, move it into a 60°C oven and dry for 36 hours, then move the dried powder into a ball mill jar and add 825 grams of tungsten powder, and add 450 grams of grinding balls, Put it on a ball mill and disperse at a speed of 150r / min. for 12 hours, take out the mixed powder and put it in 300°C and 400°C H 2 The materials were reduced under the atmosphere for 1 hour, and the materials were passed through a 60-mesh sieve and then dispersed again on a ball mill, adding 450 grams of balls, the dispersion speed was 150 r / min, and the dispersion time was 12 hours. 2 Atmosphere reduction for 3 hours to obtain tungsten-rhenium pre-alloyed powder.

[0062] Spherical powder was prepared at an argon flow rate of 6L / min. The tungsten-rhenium pre-alloyed powder was pressed on an isostatic press with a ...

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Abstract

The invention relates to the field of metal materials, in particular to a preparation method of a high-performance tungsten-rhenium alloy heating wire. The preparation method comprises the following steps: preparing rare earth ammonium rhenate, mixing, roasting and reducing, spheroidizing powder, pressing a blank, vertically melting and sintering, rotary swaging and cogging, drawing, carrying outconstant-temperature electrolytic polishing, sizing and adjusting resistance, and carrying out stable annealing. According to the preparation method, the technology is optimized by adding lanthanum or / and cerium and other rare earth elements, so that the bending resistance and other mechanical properties of the prepared high-performance tungsten-rhenium alloy heating wire are obviously improved, the service life is long, the reliability is high, the problems of wire splitting, brittle failure and the like are solved, and by combining the continuous test method of resistance per meter and constant-temperature electrolytic polishing, the resistance per meter of the prepared tungsten-rhenium alloy heating wire has high uniformity, and the recrystallization temperature is also raised.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a method for preparing a high-performance tungsten-rhenium alloy heating wire. Background technique [0002] With the development of modern technologies such as high-vacuum electron tubes, high-precision detection, and electronic imaging, more stringent requirements have been placed on the resistance uniformity, high-temperature mechanical properties, and high-temperature stability of the electron tube heating wire material. The precise control of the material preparation process Higher requirements have also been raised. [0003] In view of the application requirements and the existing quality problems such as easy splitting and brittle fracture of the wire, researchers mainly add elements such as silicon, aluminum, and potassium to improve the recrystallization temperature and shock resistance of the alloy, but the processing of the alloy wire and the After high temperature trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/04B21C37/04B22F9/14B22F9/22C21D1/26C21D9/52C22C1/04C25F1/00G01R27/02
CPCC22C27/04C22C1/045B22F9/14C21D9/525C21D1/26C25F1/00B22F9/22G01R27/02B21C37/047
Inventor 薄新维刘奇王小宇陈德茂刘成超何浩然王焱辉韩校宇姚志远
Owner CHONGQING MATERIALS RES INST
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