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One-sided welding double-sided molding welding method for titanium steel composite pipe

A single-sided welding double-sided, welding method technology, applied in welding medium, welding equipment, welding equipment and other directions, can solve the problems of complex welding process operation, large welding stress and deformation, large accumulated heat input, etc., to achieve a favorable fusion transition , Improve the strength and toughness, expand the effect of the scope of application

Active Publication Date: 2017-02-22
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the invention is to solve the problems of complex welding process operation, large cumulative heat input, large welding stress deformation and low welding efficiency in the existing titanium steel composite pipe welding, and further provide a titanium steel composite pipe welded on one side and double welded. Surface forming welding method

Method used

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  • One-sided welding double-sided molding welding method for titanium steel composite pipe
  • One-sided welding double-sided molding welding method for titanium steel composite pipe
  • One-sided welding double-sided molding welding method for titanium steel composite pipe

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specific Embodiment approach

[0040] A kind of embodiment of the present invention is: a kind of titanium-steel composite pipe (titanium alloy layer 3mm+steel metal layer 3-8mm, obtained by rolling method) single-sided welding double-sided forming welding method, comprising the following steps:

[0041] 1) Processing welding groove: processing a flat-bottomed trapezoidal groove with blunt edges on the pipe end of the titanium-steel composite pipe to be welded, the bottom edge of the flat-bottomed groove is close to the titanium alloy layer of the titanium-steel composite pipe to be welded, and the blunt edge The side size is the thickness of the titanium alloy layer; the groove angle is 15-20° on one side, and the bottom edge size of the groove is 1.4-2.4mm; figure 1 It is the design drawing of the welding groove in this example, figure 2 It is a schematic diagram of the titanium-steel composite pipe after the welding groove is processed in this example;

[0042] 2) Clean the welding area: clean the groo...

Embodiment 2

[0050] Another specific embodiment of the present invention is: a titanium-steel composite pipe (titanium alloy layer 3mm+steel metal layer 3-8mm, obtained by rolling) single-sided welding and double-sided forming welding method, comprising the following steps:

[0051] 1) Processing welding groove: processing a flat-bottomed groove with a blunt edge on the pipe end of the titanium-steel composite pipe to be welded, the bottom edge of the flat-bottomed groove is close to the titanium alloy layer of the titanium-steel composite pipe to be welded, and the blunt edge The size is the thickness of the titanium alloy layer; the groove angle is 15-20° on one side, and the size of the bottom edge of the groove is 1.4-2.4mm;

[0052] 2) Clean the welding area: clean the groove and the area to be welded of the titanium steel composite pipe to be welded. The cleaning area should not be less than 15mm from the edge of the groove, remove debris and oxide film, and then clean the area to be ...

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Abstract

The invention provides a one-sided welding double-sided molding welding method which is suitable for welding a titanium steel composite pipe. The one-sided welding double-sided molding welding method aims at solving the problems that in existing titanium steel composite pipe welding, operation of the welding process is complicated, the accumulated heat input is large, it is necessary to prepare special welding consumables, and the welding efficiency is low. The one-sided welding double-sided molding welding method for the titanium steel composite pipe comprises the following steps that (1), a flat bottom groove with a blunt edge is machined at the pipe end of the titanium steel composite pipe to be welded; (2), a welding area is cleaned; (3), a titanium alloy layer of the titanium steel composite pipe is welded through a laser welding method; (4), acetone is used as a binder so that evenly-mixed transition layer metal powder can be made into paste, the groove bottom is evenly welded, pressing is conducted, and drying is conducted; and (5), transition layer metal is molten through laser energy, the transition layer is formed firstly, and then filling of the steel metal layer is conducted through electric arc welding. By the adoption of the method, one-sided welding double-sided molding welding of the titanium steel composite pipe is achieved, and the welding quality of the titanium steel composite pipe is improved.

Description

technical field [0001] The invention relates to a welding method for single-side welding and double-side forming of a titanium-steel composite pipe, which belongs to the field of welding technology. Background technique [0002] In some special use environments, it is difficult for a single metal to meet the performance requirements of the workpiece. By choosing a suitable metal combination to make the performance complement each other, a metal composite plate that can meet this special requirement can be obtained. Each layer of metal that makes up the composite board still maintains its original characteristics, and its performance is superior to that of a single metal. Because of its very high affinity for oxygen, metal titanium can form a dense oxide film on its surface, which can protect titanium from medium corrosion. Therefore, titanium has good stability and corrosion resistance in acidic, alkaline, neutral saline solution and oxidizing medium. Titanium alloys are wi...

Claims

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Application Information

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IPC IPC(8): B23K26/348B23K26/60B23K33/00B23K35/24B23K101/06B23K103/16
CPCB23K26/348B23K26/60B23K33/004B23K35/24B23K2101/06B23K2103/16
Inventor 陈勇陈辉杨涛王梦超
Owner SOUTHWEST JIAOTONG UNIV
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