A welding process for producing stainless steel composite pipe

A welding process and stainless steel technology are applied in the field of welding process for producing stainless steel composite pipes to achieve the effect of reducing corrosion resistance.

Active Publication Date: 2016-08-24
DALIAN SAGE GROUP
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the present invention researches and designs a welding process for producing stainless steel composite pipes, which is used to solve the problem that the traditional welding process for steel pipes with stainless steel inside and carbon steel outside cannot be realized by welding carbon steel first and then stainless steel. shortcoming

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
  • A welding process for producing stainless steel composite pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] like figure 1 As shown, a welding process for producing stainless steel composite pipes comprises the following steps:

[0021] (1) Weld the cladding layer 1 of the stainless steel composite pipe to form a weld bead 4; the welding of the weld bead 4 should adopt TIG, MIG, or laser welding methods to ensure that the weld bead is free of dross, which is conducive to the welding of the next weld bead .

[0022] (2) A transition layer 2 is welded between the cladding layer 1 and the base layer 3 of the stainless steel composite pipe to form a weld bead 2 5; the welding of the weld bead 2 5 uses electrodes with high chromium and nickel content, such as: A302, A307, It can reduce the impact on the cladding material when welding the base material.

[0023] (3) Weld the base layer 3 of the stainless steel composite pipe to form the third weld bead 6; the welding of the third weld bead 6 adopts the submerged arc welding method, and the welding material adopts the same material...

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
diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses a welding technology for stainless steel composite tubes, which comprises the following steps: (1) conducting welding on the stainless steel composite tube overlying layer to form a welding path I; (2) welding a transition layer between the stainless steel composite tube overlying layer and the substrate layer to form a welding path II; (3) conducting welding on the stainless steel composite tube substrate layer to form a welding path III. According to the welding technology for stainless steel composite tubes provided by the invention, the overlying layer stainless steel (inner layer) of the composite tube is welded first and the substrate carbon steel (outer layer) is welded later, so as to effectively solve the problem that the conventional technology, namely welding carbon steel first and welding stainless steel later, can not weld a composite tube with a diameter smaller than 325, and the welding of the transition layer (welding path II) between the overlying layer and the substrate layer better solves the problem that, in the process of welding overlying layer, the increase of overlying carbon leads to the decrease of overlying layer corrosion, and the problem that, in the process of welding substrate layer, the increase of alloy (chromium and nickel) content leads to the forming of hard organization in the welding line is solved as well.

Description

technical field [0001] The invention relates to the field of welding technology for composite materials of two or more different metals, and relates to a welding technology for producing stainless steel composite pipes. Background technique [0002] At present, the welding of composite materials of two or more different metals is a relatively complicated welding process problem. The composite material of stainless steel and carbon steel is used as an example to illustrate (hereinafter referred to as composite material). [0003] The current composite material welding process for the production of stainless steel composite pipes is to weld carbon steel first and then stainless steel. However, this process cannot be realized in some cases. For example, the welding of steel pipes for the production of inner stainless steel and outer carbon steel is a headache. problem, and the patented technology can be well applied to this field and solve this problem. [0004] For the produc...

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 Patents(China)
IPC IPC(8): B23K26/348B23K9/00B23K33/00
Inventor 马丽高国鸿
Owner DALIAN SAGE GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap