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

Flame preheating tungsten electrode argon arc brazing method

A tungsten argon arc and brazing method technology, applied in arc welding equipment, electric heating device, welding equipment and other directions, can solve the problems of affecting the wetting and filling of the solder, large thermal stress, difficult to use flux, etc. The effect of high brazing rate and high density

Active Publication Date: 2016-03-16
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the concentration of heat during arc heating, a temperature field with a large gradient is formed during welding, resulting in large thermal stress
In addition, it is difficult to use flux when arc heating is used, which affects solder wetting and joint filling, and has an adverse effect on joint performance

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
  • Flame preheating tungsten electrode argon arc brazing method
  • Flame preheating tungsten electrode argon arc brazing method
  • Flame preheating tungsten electrode argon arc brazing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The 316LN austenitic stainless steel base metal 1 is butted, the base metal sample is 100mm long, 30mm wide, and 2mm thick. Ensure that the gap can be filled, and cover an appropriate amount of 101 flux 3 on the brazing seam and the solder 2, such as figure 1 shown.

[0015] Use the flame gun 4 (hydrogen-oxygen flame gun can be selected) to preheat the surface of the base metal 1 that is far away from the brazing joint, and melt the 101 flux 3 through heat transfer, such as figure 2 shown.

[0016] Under the protection of the molten flux 5, use the argon tungsten arc torch 7 to quickly heat the solder 2 to melt it through the discharge of the arc 8, and the liquid solder 6 fills the gap of the base metal 1, as image 3 shown.

[0017] During the cooling process, the base metal 1 is baked with a flame gun 4 to prevent excessive cooling, and after cooling, a brazing seam 9 is formed, such as Figure 4 shown.

[0018] The dimensions of the brazed joints were measure...

Embodiment 2

[0020] The 316LN austenitic stainless steel base metal 1 is butted, the base metal sample is 100mm long, 30mm wide, and 2mm thick, the width of the brazing seam is 0.15mm, and the Cu-Mn-Ni brazing material 2 is preset above the brazing seam. Ensure that the gap can be filled, and cover an appropriate amount of 201 flux 3 on the brazing seam and the solder 2, such as figure 1 shown.

[0021] Use the flame gun 4 (butane flame gun can be selected) to preheat the surface of the base metal 1 that is far away from the brazing joint, and melt the flux 3 through heat transfer, such as figure 2 shown.

[0022] Under the protection of the molten flux 5, use the argon tungsten arc torch 7 to quickly heat the solder 2 to melt it through the discharge of the arc 8, and the liquid solder 6 fills the gap of the base metal 1, as image 3 shown.

[0023] During the cooling process, the base metal 1 is baked with a flame gun 4 to prevent excessive cooling, and after cooling, a brazing seam...

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
widthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a flame preheating tungsten electrode argon arc brazing method used for austenitic stainless steel brazing and connection. The method includes the following steps that multiple pieces of stainless steel parent metal are in butt joint, the brazing seam gap width ranges from 0.05 mm to 0.5 mm, brazing filler metal is prearranged above brazing seams, gaps can be filled with the brazing filler metal, and the gaps of the brazing seams and brazing filler metal welding wires are covered with brazing flux; the surfaces of the pieces of parent metal far away from the brazing seams are preheated through flame guns, and the brazing flux is melted through heat transfer; and after the brazing flux is completely melted, argon tungsten-arc welding guns are used for conducting arc discharge to heat the brazing filler metal wires quickly, gaps of the parent metal are filled with the melted brazing filler metal, and the parent metal is baked through flames in the cooling process to prevent the parent metal from being cooled too quickly or cooled at uneven temperatures. The flame preheating tungsten electrode argon arc brazing method has the beneficial effects that the problems that thermal stress and thermal deformation are serious and interfaces are prone to cracking when austenitic stainless steel is directly brazed in an argon arc manner are solved, and brazing joints high in density, high in brazed rate and small in deformation can be obtained.

Description

technical field [0001] The invention relates to a flame preheating tungsten argon arc brazing method, which is used for brazing connection of austenitic stainless steel and belongs to the field of brazing technology. Background technique [0002] Due to its excellent high temperature resistance, oxidation resistance and corrosion resistance, austenitic stainless steel is the most commonly used material for manufacturing components used in harsh environments such as vacuum, low temperature and radiation. Due to the large size of stainless steel components in large-scale equipment and high requirements for dimensional accuracy, the use of fusion welding technology often results in welding deformation exceeding the allowable limit. Arc brazing technology has low heat input, does not melt the base metal, is relatively easier to control welding deformation, and can avoid thermal damage to components. It is one of the preferred connection technologies for austenitic stainless stee...

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): B23K1/00B23K3/04B23K9/167
CPCB23K1/00B23K3/043B23K9/167B23K2103/04
Inventor 张青科钟素娟龙伟民杜全斌马力路全彬裴夤崟薛行雁赵辰丰丁天然
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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