Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for heat treatment of tungsten-rhenium alloy wire

A technology of tungsten-rhenium alloy and alloy wire, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve problems affecting the physical properties of alloy wire, brittle fracture and splitting

Active Publication Date: 2020-03-06
NORTHEASTERN UNIV
View PDF7 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for heat treatment of tungsten-rhenium alloy wire
  • Method for heat treatment of tungsten-rhenium alloy wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Put the 25cm tungsten-rhenium couple wire into the quartz tube. The inner diameter of the quartz tube is 0.5cm and the length is 110cm. Connect the quartz tube to the rubber plug and put it into the corundum tube of the silicon molybdenum rod high-temperature furnace. Use sealant at the connection Seal with raw material tape. Ar gas is passed into the furnace bottom tube, the argon pressure is 0.35 MPa, the flow is 0.5 L / min, and the time is 5 min. After 5 minutes, open the hydrogen gas valve. The pressure of hydrogen is 0.4 MPa and the flow rate is 50 mL / min. Start the set program and turn on the heating power. When the furnace temperature reaches 1200°C, the hydrogen flow rate is increased to 80 mL / min, the holding time is 1 h, and then the temperature drops. When the temperature in the furnace drops below 300°C, adjust it to cool down with the furnace and stop feeding hydrogen, continue to feed argon into the furnace for 5 minutes, and then drain the hydrogen to co...

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 3402.4Mpa, and the bending strength increases by 5.34% after treatment.

Embodiment 3

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
flexural strengthaaaaaaaaaa
flexural strengthaaaaaaaaaa
flexural strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for heat treatment of a tungsten-rhenium alloy wire. The method comprises the following steps of carrying out alkali washing and acid washing treatment on the surfaceof the tungsten-rhenium alloy wire to remove oil stain impurities; introducing high-purity argon into a heating furnace, introducing hydrogen into the furnace after air in the furnace are completely discharged out, heating the tungsten-rhenium alloy wire subjected to acid-alkali treatment to 1200-1500 DEG C under the condition of continuously introducing hydrogen, keeping the temperature for 1-2 hours, and then lowering the temperature to the room temperature to obtain the heat-treated alloy wire; and the cooling mode adopts segmented cooling, when the temperature is lowered to 200-400 DEG C at the rate of 1-3 DEG C / min, the cooling mode is adjusted to furnace cooling, introduction of the hydrogen is stopped, and the argon is introduced to evacuate the hydrogen, and after being cooled to the room temperature, the heat-treated alloy wire is taken out. According to the method, the tungsten-rhenium alloy wire is subjected to hydrogenation heat treatment, oxide is reduced, the grain size is refined, the brittle fracture resistance is improved, and the bending resistance is improved.

Description

Technical field: [0001] The invention belongs to the technical field of tungsten rhenium alloy wire treatment, and specifically relates to a method for heat treatment of 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, the tungsten-rhenium thermocouple wire is brittle, and it is prone to brittle fracture and splitting during its winding process, which seriously affects the yield of alloy wires. [0003] Scanning electron microscope observation and analysis of the tungsten-rhenium alloy wire shows that the brittle fracture and splitting of the alloy wire are caused by the existence of a large number of microcracks and oxides with the alloy wire. The existence of these cracks and oxides seriously affects the physical properties of the alloy wire, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com