Method for repairing arc-seam weld porosity defects of titanium alloy sheets through hot rolling

A welding seam porosity and hot rolling technology, applied in welding power source, welding equipment, resistance welding equipment and other directions, can solve the problems of deformation, large local deformation and small welding shrinkage.

Inactive Publication Date: 2011-06-29
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The focus is: to solve the quality problems of pores in the welding seam of titanium alloy sheet welding casing components, and to solve the large local deformation problem in the pr

Method used

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  • Method for repairing arc-seam weld porosity defects of titanium alloy sheets through hot rolling
  • Method for repairing arc-seam weld porosity defects of titanium alloy sheets through hot rolling
  • Method for repairing arc-seam weld porosity defects of titanium alloy sheets through hot rolling

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Experimental program
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Effect test

Embodiment 1

[0057] A method for hot rolling to repair the pores of welded seams of titanium alloy thin plates, which uses the principle of resistance welding and the resistance welding characteristics of the parts themselves to perform hot rolling operations; specifically, the method of rolling welding is used to weld metal The process of applying pressure and heating to eliminate pores.

[0058] The method for hot rolling repairing the pore defect of titanium alloy thin plate fusion welding seam described in this embodiment also includes the following content description:

[0059] In the method of hot rolling repairing the pore defect of titanium alloy thin plate fusion welding seam, before the hot rolling repair operation, the welding test piece is used to carry out the hot rolling test so as to select the appropriate parameters of pressure, current and energization time; The welding test piece is specifically the test piece with the same material and thickness as the part to be repaire...

Embodiment 2

[0073] The content of this embodiment is basically the same as that of Embodiment 1, the difference is that:

[0074] The hot rolling method for repairing the pore defect of titanium alloy thin plate fusion welding seam is aimed at the special resistance welding fixture: columnar electrode, using the following specific operation method of hot rolling:

[0075] Place the weld defect to be repaired on the processed part between two columnar electrodes, apply pressure and energize according to the same parameters of the test to remelt the pores inside the weld.

[0076] While using the above two specific operation schemes, it is also required to carry out small current cladding repair operation on the deep indentation on the surface of the processed part.

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Abstract

The invention discloses a method for repairing the arc-seam weld porosity defects of titanium alloy sheets through hot rolling, which is characterized in that the hot rolling operation is performed by using the resistance welding principle and the resistance welding properties of materials of parts, and specifically discloses a process method which is implemented through exerting a pressure on weld metals and carrying out ohmic-heating so as to eliminate porosities by using a roll welding method. By using the method disclosed by the invention, the problem that the insides of arc-seam welds have porosity defects in the process of processing titanium alloy plate-welding cases can be solved subtly, the quality repair on welds with small deformation or micro-deformation can be realized, and in the process of hot rolling, because the weld position is heated or pressurized, and subjected to trace form correction and welding stress elimination, the weld qualities, structure sizes and technical conditions of parts after construction meet the design requirements. If a repair welding part has an indentation with a depth exceeding process standards, the defect can be treated by using an argon arc welding surface-cladding process, and the qualification rate of defect repair implemented by using the method disclosed by the invention is 100%.

Description

Technical field: [0001] The invention relates to the manufacturing and repairing technology of titanium alloy thin-walled welded parts, and in particular provides a method for repairing pore defects of welding seams of titanium alloy thin plates by hot rolling. Background technique: [0002] In the prior art, the casing of a booster cylinder and the casing of a diffuser are designed as titanium alloy thin-wall welded casings. The problem of porosity in the process of fusion welding (argon arc welding) on ​​the main body of titanium alloy sheet welding receiver (afterburner shell, diffuser shell) has always been one of the problems that seriously affect the welding quality of parts. During the fusion welding process of titanium alloys, porosity is the most common welding defect in titanium alloy welding. Sheet welding casing parts generally stipulate that the quality of the weld is a critical (heavy) characteristic, and the air hole defects inside the weld are unqualified ac...

Claims

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Application Information

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IPC IPC(8): B23K11/02B23K11/06B23K11/24
Inventor 张炳海耿强黄青松曲伸刘晓娟
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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