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

Large ratio of depth to width tungsten electrode inert gas-shielded welding technique

A tungsten inert gas and inert gas technology, used in welding media, manufacturing tools, welding equipment, etc., can solve the problems of complex process, low welding efficiency, shallow penetration of TIG welding, etc., and achieve clean weld surface and welding efficiency. Improve and shape the effect

Active Publication Date: 2008-06-04
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a high-efficiency large aspect ratio tungsten inert gas shielded welding process to solve the problems of shallow penetration depth, complicated process and low welding efficiency of TIG welding.

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
  • Large ratio of depth to width tungsten electrode inert gas-shielded welding technique
  • Large ratio of depth to width tungsten electrode inert gas-shielded welding technique
  • Large ratio of depth to width tungsten electrode inert gas-shielded welding technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0040] In this embodiment, SUS304 stainless steel is used as the base material, and under different welding specifications (welding current, welding speed and arc length), He-O 2 and He-CO 2 For the welding experiment under the protection of mixed gas, the gas flow rate in this embodiment is 10 L / Min. Welding experiments were carried out on an AC-DC dual-purpose digital TIG welding machine, using DC reverse connection. The changing range of welding current is 80A~250A, and the shape change of molten pool can be found in Figure 7 a-i. Under the protection of pure He, when the welding current is 80A, 140A and 250A, the morphology of the molten pool is shallow and wide (see Figure 7 a-c). In He-0.4%O 2 Under protection, the molten pool morphology becomes deep and narrow (see Figure 7 d-f, the welding current is 80A, 140A, 250A respectively). In He-0.6% CO 2 Under protection, the molten pool morphology when the welding current is 80A, 140A and 250A see Figure 7 g-i. ...

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
Lengthaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the welding field, in particular to a high-efficiency large depth-width-ratio tungsten electrode inert gas protection welding (TIG) process and the method, which solves the problems of TIG welding of shallow weld penetration, complex process, low welding efficiency, etc. The process adds slight active gas (oxygen or carbon dioxide) to helium-based inertia protection gas; the slight active gas is decomposed in the welding process and is dissolved in a liquid welding pool; the content of the active group element oxygen in the melting pool is adjusted and surface tension temperature gradient coefficient and melting pool convection direction are changed, thus controlling the heat convection and heat transmission direction in the melting pool, obtaining the appearance of the melting pool with high depth-width-ratio and improving welding efficiency. The welding method of the invention carries out a welding test to a stainless steel testing plate under different welding norms (welding current, welding speed and electric arc length), which is proved. The welding technique of the invention is suitable for welding different stainless steel and carbon-steel materials.

Description

technical field [0001] The invention belongs to the field of welding, specifically to obtain a high-efficiency and large aspect ratio tungsten inert gas shielded welding process, which is suitable for tungsten inert gas shielded welding of stainless steel and carbon steel. Background technique [0002] Welding technology is an indispensable and important part of modern manufacturing industry, and has penetrated into various production fields of modern machinery manufacturing industry. High quality, high efficiency, high reliability, and low cost have become the symbols to measure whether a welding method and welding process are excellent. [0003] As a main welding method, tungsten inert gas shielded welding (TIG) has a stable welding process and good protection effect, and has been widely used in industrial production, especially for stainless steel, titanium alloys and non-ferrous metals. widely. However, due to the limited current carrying capacity of the tungsten elect...

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
IPC IPC(8): B23K35/38B23K9/16B23K9/095B23K31/12
Inventor 陆善平李殿中
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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