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

Iron white copper and austenitic stainless steel arc melting and welding method

An austenitic stainless steel, arc melting technology, used in arc welding equipment, welding equipment, welding/welding/cutting items, etc.

Active Publication Date: 2008-12-17
渤海造船厂集团有限公司
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no ready-made standards in China for the welding of dissimilar materials between thick-walled pipes and their piping accessories and austenitic stainless steel.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The specific implementation of the present invention is described below in conjunction with the technical solution.

[0017] The method and steps for welding thick-walled iron-nickel alloy pipes with austenitic stainless steel are as follows:

[0018] (1) Process the beveling of the thick-walled iron-nickel alloy pipe and the austenitic stainless steel component to be welded.

[0019] (2) Remove oxide scale, oil, rust, water and other dirt within 30mm of the area to be welded, and wipe it clean with acetone.

[0020] (3) Tack welds are filled with argon tungsten arc welding Nickel-copper alloy welding wire welding, in the nickel-copper alloy welding wire, the content ratio of nickel to copper is 62%:38% by weight percentage, welding current is 185A, shielding gas is pure argon, flow rate is 10L / min, tungsten electrode diameter use The length of the tack weld is 10mm, and the distance between two tack welds is 100mm.

[0021] (4) Formal welds are filled with manual tungste...

Embodiment 2

[0023] The method and steps for welding thick-walled iron-nickel alloy pipes with austenitic stainless steel are as follows:

[0024] (1) Process the beveling of the thick-walled iron-nickel alloy pipe and the austenitic stainless steel component to be welded.

[0025] (2) Remove oxide scale, oil, rust, water and other dirt within 30mm of the area to be welded, and wipe it clean with acetone.

[0026] (3) Tack welds are filled with argon tungsten arc welding Nickel-copper alloy welding wire welding, in the nickel-copper alloy welding wire, the content ratio of nickel to copper is 67%:33% by weight, the welding current is 200A, the shielding gas is pure argon, the flow rate is 12L / min, the diameter of the tungsten electrode use The length of the tack weld is 12mm, and the distance between the two tack welds is 125mm.

[0027] (4) Formal welds are filled with manual tungsten argon arc welding Nickel-copper alloy welding wire welding, the content ratio of nickel to copper in the n...

Embodiment 3

[0029] The specific implementation of the present invention is described below in conjunction with the technical solution.

[0030] (1) Process the beveling of the thick-walled iron-nickel alloy pipe and the austenitic stainless steel component to be welded.

[0031] (2) Remove oxide scale, oil, rust, water and other dirt within 30mm of the area to be welded, and wipe it clean with acetone.

[0032] (3) Tack welds are filled with argon tungsten arc welding Nickel-copper alloy welding wire welding, in the nickel-copper alloy welding wire, the content ratio of nickel to copper is 69%:31% by weight percentage, the welding current is 300A, the shielding gas is pure argon, the flow rate is 15L / min, the diameter of the tungsten electrode use The length of the tack weld is 15mm, and the distance between two tack welds is 150mm.

[0033] (4) Formal welds are filled with manual tungsten argon arc welding Nickel-copper alloy welding wire welding, the content ratio of nickel to copper in ...

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

No PUM Login to View More

Abstract

The invention discloses an electric arc melting welding method of copper-nickel-iron alloy and austenitic stainless steel, which is an electric arc melting welding method that adopts the direct current welding power supply with the output current being more than 300A, uses pure helium as protective gas and adds nickel-copper alloy welding wires for welding a welded joint between a thick-wall large-diameter copper-nickel-iron alloy pipe and the austenitic stainless steel in the welding process. The method is characterized in that in the welding process, a tungsten electrode with the diameter of Phi3.2 to 4mm is adopted, the pure helium is used for protection and the nickel-copper alloy welding wires of Phi 2 to 4mm are added for welding; at the same time, the welding current is guaranteed to reach 180 to 300A and the flow volume of the protective gas is 10 to 15L per minute. The method has the positive effects of solving the problems of the welding of the welded joint between the thick-wall large-diameter copper-nickel-iron alloy and the austenitic stainless steel, so as to avoid the problem that hot cracking and stomata are easy to appear in the welding process.

Description

Technical field [0001] The invention relates to a welding method, in particular to an arc fusion welding method of iron white copper and austenitic stainless steel. Background technique [0002] Copper-nickel alloy (such as BFe10-1-1 and BFe30-1-1) has good comprehensive mechanical properties and does not require preheating during welding. BFe10-1-1 and BFe30-1-1 and other iron-nickel alloys are copper-nickel alloys. There is no obvious phase change during the welding process, and the linear expansion coefficient is high. Large stress and deformation will occur during welding. Its sulfur and phosphorus Impurities are very sensitive and easy to form hot cracks. At the same time, because the white copper contains more nickel, nickel can sharply increase the solubility of hydrogen in copper, so when welding, the white copper weld will be very sensitive to hydrogen holes. According to the content of carbon content, chromium-nickel content ratio, stabilizing element titanium, niobium ...

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): B23K9/173B23K9/235B23K9/095B23K103/22
Inventor 刘殿宝刘放李海涛魏兴明辛建甘学杰
Owner 渤海造船厂集团有限公司
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