Control method for eliminating weld crack of high temperature titanium alloy plate

A technology for high-temperature titanium alloy and weld cracks, which is applied in the field of elimination and control of high-temperature titanium alloy plate weld cracks, can solve problems such as cracks, and achieve the effect of improving stability and structural strength

Inactive Publication Date: 2020-03-06
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Abstract
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  • Application Information

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Problems solved by technology

Solve the problem that cracks are easy to exist in the welding of high-temperature titanium alloy materials in the prior art

Method used

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  • Control method for eliminating weld crack of high temperature titanium alloy plate
  • Control method for eliminating weld crack of high temperature titanium alloy plate
  • Control method for eliminating weld crack of high temperature titanium alloy plate

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preparation example Construction

[0049] Further, the preparation method of the titanium alloy flux described in the method for eliminating and controlling weld seam cracks of high-temperature titanium alloy plates shown in the embodiments of the present invention includes: mixing 300-500 mesh pure titanium powder, 300-500 mesh BaCl 2 Powder, 300-500 mesh NaF 2 The powder is mixed according to the mass ratio of 20:1:1, and the obtained mixture and alcohol are mixed evenly according to the ratio of 1:3, and the mixture settled at the bottom is used as the titanium alloy flux. In the embodiment of the present invention, the above-mentioned titanium alloy flux is painted on the arc starting area and the arc ending area. On the one hand, the titanium alloy flux is filled with pure titanium powder, and the gap between the titanium foil and the high-temperature titanium alloy plate is avoided to avoid Weld collapse or undercut caused by lack of material; on the other hand, BaCl in titanium alloy flux 2 Powder, NaF ...

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Abstract

The invention relates to a control method for eliminating weld cracks of high temperature titanium alloy plates. The control method includes the steps that removing oxygen-enriched layers in arc starting areas and arc closing areas; butt jointing the arc staring areas and the arc closing areas of the high temperature titanium alloy plates to be welded correspondingly; selecting two pieces of titanium foil and inserting the titanium foil into the gap between the arc starting areas and the gap between the arc closing areas of the high temperature titanium alloy plates to be welded; painting a layer of titanium alloy flux coating in each arc starting area and arc closing area; adopting defocused speckle to laser scanning the coatings, and enabling the surface of titanium alloy flux to be slightly melted and solidified in the arc starting areas and arc closing areas; and adopting laser welding method to weld butt welds of the high temperature titanium alloy plates to be welded. The controlmethod greatly improves the stability of laser welding welds of titanium alloy material, further improves the structural strength of titanium alloy material, and is widely used in the fields of aerospace and people livelihood field.

Description

technical field [0001] The invention relates to the technical field of laser welding processing, in particular to a method for eliminating and controlling weld seam cracks of high-temperature titanium alloy plates. Background technique [0002] With the high-altitude and high-speed demand of my country's new generation of aircraft, my country's new generation of high-temperature titanium alloy materials has gradually entered the stage of engineering application. The research and development of high-temperature and high-strength titanium alloys is one of the important development trends of titanium alloys. Domestically, this series of titanium alloys A lot of progress has been made in this field. At present, most of the new high-temperature titanium alloy materials developed at home and abroad are nearly α-type, and there are many alloy elements inside. After high-temperature rolling, the surface of the plate is prone to appear oxygen-rich layers, and alloy elements are prone ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/26B23K26/32B23K26/14B23K35/32B23K26/60B23K26/36B08B7/00
CPCB08B7/0042B23K26/14B23K26/26B23K26/32B23K26/36B23K35/0255B23K35/325B23K26/60B23K2101/18B23K2103/14
Inventor 王彬段爱琴何恩光姜宽孔德夷
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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