Ferritic steel barrel butt-junction circular-seam hot-wire TIG multi-layer multipath welding method

A low-alloy steel, multi-layer and multi-channel technology, applied in welding equipment, heat treatment furnace, arc welding equipment, etc., can solve the problems of low deposition efficiency and long processing cycle, so as to improve processing quality, reduce processing cost, prevent The effect of slag accumulation

Inactive Publication Date: 2009-03-25
HARBIN JIANCHENG GRP
View PDF0 Cites 34 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a low-alloy steel cylinder butt ring seam hot wire TIG multi-layer multi-pass welding method, which solves the problem

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
  • Ferritic steel barrel butt-junction circular-seam hot-wire TIG multi-layer multipath welding method
  • Ferritic steel barrel butt-junction circular-seam hot-wire TIG multi-layer multipath welding method
  • Ferritic steel barrel butt-junction circular-seam hot-wire TIG multi-layer multipath welding method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0025] Specific implementation manner 1: The specific process of the low-alloy steel cylinder butt joint circumferential seam hot wire TIG multi-layer multi-pass welding method described in this embodiment is:

[0026] Step 1: Machining the grooves on the end faces of the tube to be welded: turning the welding end faces of the two tube parts to be welded into mutually matched blunt U-shaped grooves;

[0027] Step two, welding the U-shaped groove, specifically including the following steps:

[0028] Step 2: Pre-welding and pre-heating the two cylinders to be welded: pre-welding the two cylinders to be welded in place, preheating the furnace, heating temperature 280~300℃, holding time 120± 5 minutes to heat the product evenly;

[0029] Step two, take the test piece processed in step two out of the furnace, put it into the fixing device of the automatic welding machine, adjust the relative position of the welding gun, welding wire 1, and work piece 5. The distance between the end of ...

Example Embodiment

[0047] Specific embodiment 2: The difference between this embodiment and the specific embodiment is that the low-alloy steel cylinder butt joint circumferential seam hot wire TIG multilayer multi-pass welding method is different in that the wall thickness S of the cylinder to be welded is 15mm~ 50mm, the difference of the welding method is:

[0048] In the bottom welding process of steps two and three, a welding wire with a diameter of 1.2mm is used, the welding current is 145A~160A, the arc length is 3mm~4mm, the corresponding voltage is 12V~14V, and the rotation speed is 120mm / min. The diameter is 4mm~5mm, the end angle of the tungsten electrode is 30°~40°, the length of the tungsten electrode protruding from the protection nozzle 3 is 6mm~8mm, the inner diameter of the protection nozzle 3 is 11mm, and the gas flow rate is 18L / min~22L / min, welding gun advance is 25mm~30mm,

[0049] The program parameter setting of TIG welding is shown in Table 1:

[0050] Table 1

[0051] ...

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
Tensile strengthaaaaaaaaaa
Wall thicknessaaaaaaaaaa
Login to view more

Abstract

Disclosed is a hot filament TIG multi-layer and multi-track welding method for low alloy steel cylinder butt joint girth welding, relating to a low alloy steel cylinder butt joint girth welding method which solves the problems in the prior low alloy steel cylinder butt joint girth welding that the welding deposition rate of the cold filament TIG filling welding is low so as to result in low product qualification ratio and the long process cucle. The welding process includes: firstly, processing the slope mouth of the end face the awaiting welding cylinder piece; secondly, processing the welding for the U-shape slope mouth, pre-welding and preheating for the two awaiting welding cylinder pieces, performing bottom welding, multi-layer and multi-track filling welding and multi-layer and multi-track cap welding; thirdly, post-heating and degassing hydrogen; fourthly, stress removing and annealing; fifthly, modifying and quenching. The cylinder butt joint welding by the invention can increase the welding deposition ratio of the welding filament by 2 to 3 times and greatly increase the product qualification ratio by first delivery check. The method of the invention is particularly applicable to the 35CrMnSiA alloy cylinder butt joint welding.

Description

technical field [0001] The invention relates to a welding method for butt joint girth seam of a low-alloy cylinder. Background technique [0002] The existing low-alloy steel cylinder butt girth welding generally adopts the electron beam welding process, but due to the imperfect adjustment and matching of the process parameters of the electron beam welding, defects such as incomplete fusion, cracks, and penetrating shrinkage holes appear in the weld, It cannot meet the quality requirements of the product, and the passing rate of the first inspection is only 55%. The repair process of unqualified products is also relatively complicated, which increases the labor cost, and also increases the processing cycle and processing cost of the product. Contents of the invention [0003] The purpose of the present invention is to provide a low-alloy steel cylinder butt joint girth seam hot wire TIG multi-layer multi-pass welding method, which solves the existing low-alloy steel cylind...

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): B23K9/16B23K9/235B23K9/133B23K9/095C21D9/08C21D1/30C21D1/18
Inventor 徐中山邹玉宏侯玉华周健
Owner HARBIN JIANCHENG GRP
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