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A kind of method for heat treatment of tungsten-rhenium alloy wire

A tungsten-rhenium alloy and alloy wire technology, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problems affecting the physical properties of alloy wires, brittle fracture and splitting, etc., to improve brittle fracture resistance, eliminate residual stress, Effect of grain size refinement

Active Publication Date: 2021-08-24
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of these cracks and oxides seriously affects the physical properties of the alloy wire, making it prone to brittle fracture and splitting during the winding process

Method used

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  • A kind of method for heat treatment of tungsten-rhenium alloy wire
  • A kind of method for heat treatment of tungsten-rhenium alloy wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Put the tungsten-rhenium couple wire with a length of 25cm into the quartz tube, the inner diameter of the quartz tube is 0.5cm, and the length is 110cm. After connecting the quartz tube with a rubber plug, put it into the corundum furnace tube of the silicon-molybdenum rod high-temperature furnace, and seal the joint Seal with raw tape. Argon gas is fed into the furnace bottom tube, the argon pressure is 0.35MPa, the flow rate is 0.5L / min, and the time is 5min. After 5 min, open the hydrogen gas valve. The pressure of hydrogen is 0.4MPa, and the flow rate is 50mL / min. Start the set program and turn on the heating power. When the furnace temperature reaches 1200°C, increase the flow rate of hydrogen to 80mL / min, hold the temperature for 1h, and then drop the temperature. When the temperature in the furnace drops below 300°C, adjust to cool with the furnace, stop feeding hydrogen, and continue feeding argon into the furnace for 5 minutes to drain the hydrogen and let ...

Embodiment 2

[0055] The process is the same as in Example 1, the heat treatment temperature is 1200° C., and the holding time is 2 hours. The measured bending strength reaches 3402.4 Mpa, and the bending strength increases by 5.34% after treatment.

Embodiment 3

[0057] The process is the same as in Example 1, the heat treatment temperature is 1300° C., and the holding time is 2 hours. The measured bending strength reaches 3514.9 Mpa, and the bending strength increases by 8.82% after treatment.

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Abstract

A heat treatment method for tungsten-rhenium alloy wire of the present invention, the steps are as follows: carry out alkali cleaning and pickling treatment on the surface of tungsten-rhenium alloy wire to realize the removal of oily impurities; After the air is exhausted, hydrogen gas is introduced into the furnace. In the state of continuously feeding hydrogen gas, the tungsten-rhenium alloy wire after acid-base treatment is heated to 1200-1500 ° C, and after 1-2 hours of heat preservation, it is lowered to room temperature to obtain heat treatment. Rear alloy wire, wherein, the cooling method is segmented cooling, at a rate of 1-3 °C / min, when the temperature is lowered to 200-400 °C, the cooling mode is adjusted to cool with the furnace, and the hydrogen gas is stopped, and the argon gas is passed in Gas to evacuate the hydrogen, when the alloy wire is cooled to room temperature after heat treatment, take it out. In the method, the tungsten-rhenium alloy wire is hydrogenated and heat-treated to reduce the oxide, refine the grain size, improve the brittle fracture resistance, and improve the bending resistance.

Description

Technical field: [0001] The invention belongs to the technical field of tungsten-rhenium alloy wire treatment, and in particular relates to a heat treatment method for tungsten-rhenium alloy wire. Background technique: [0002] Tungsten-rhenium thermocouples are widely used in high-tech metallurgy, nuclear reactor high-temperature detection and other industries due to their excellent high-temperature performance, and have very broad prospects. However, tungsten-rhenium thermocouple wire is relatively brittle, and it is prone to brittle fracture and splitting during its winding process, which seriously affects the yield of alloy wire. [0003] Through scanning electron microscope observation and analysis of tungsten-rhenium alloy wire, it is concluded that the brittle fracture and splitting of the alloy wire are due to the existence of a large number of microcracks and oxides in the alloy wire. The existence of these cracks and oxides seriously affects the physical propertie...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/18C22F1/02C21D9/52
CPCC21D9/525C22F1/02C22F1/18
Inventor 王明华娄太平王魁汉夏春明王健璋张万里
Owner NORTHEASTERN UNIV LIAONING
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