Auxiliary agent for laser welding, application thereof and welding method

A technology of laser welding and auxiliary agent, applied in the direction of laser welding equipment, welding medium, welding equipment, etc., can solve the problem of poor weld quality, achieve the effect of improving the number of pores and reducing the generation of pores

Active Publication Date: 2019-12-20
ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the existing underwater wet laser welding technology cannot break through the 8mm limit welding water depth and the welding seam has many pores and residues in the existing underwater welding, resulting in poor quality of the weld seam, the present invention provides an auxiliary agent for laser welding, Its application and welding method, so as to realize the effective welding of aluminum bronze or tin bronze with a water depth below 8mm by underwater wet laser welding technology, and at the same time, it can effectively reduce the internal pore defects of the weld and effectively improve the stability of the welding process

Method used

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  • Auxiliary agent for laser welding, application thereof and welding method
  • Auxiliary agent for laser welding, application thereof and welding method
  • Auxiliary agent for laser welding, application thereof and welding method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1 A kind of auxiliary agent for laser welding (1)

[0034] It consists of the following raw materials in parts by weight: 40 parts of copper oxide (CuO), 9 parts of aluminum (Al), calcium fluoride (CaF 2 ) 22 parts, calcium carbonate (CaCO 3 ) 27 copies.

[0035] According to the above mass percentage, CuO, Al, CaF 2 , CaCO 3 The powder is mixed evenly, the particle size is in the range of 100-300 mesh, and it is spherical or spherical powder.

Embodiment 2

[0036] Application of embodiment 2 laser welding auxiliary agent

[0037] In the embodiment of the present invention, the aluminum bronze is a QAL9-4 plate, and the sample size is 80mm×80mm×10mm.

[0038](1) Mix the 302 adhesive acrylate and the curing agent (modified amine) according to the volume ratio of 1:1 to obtain the adhesive, and then mix the adhesive with the auxiliary agent for laser welding prepared in Example 1 by volume Mix at a ratio of 1:1, stir evenly to obtain 1 portion of paste-like mixture;

[0039] (2) Finely grind the aluminum bronze to be welded, and then use HNO 3 +H 2 The mixed solution of O is pickled to remove the oxide layer on the surface, and then cleaned with acetone;

[0040] (3) Apply the paste mixture prepared in step (1) evenly on the position of the titanium alloy to be welded, with a thickness of about 1 mm;

[0041] (4) After the paste mixture was allowed to stand for 10 minutes to solidify, underwater wet laser welding was performed. ...

Embodiment 3

[0045] Embodiment 3 Welding quality detection experiment

[0046] Set up control groups 1-4, and carry out butt welding experiments in combination with Example 1 under the condition of preset 1.2mm thick powder on the detection surface, and the final detection data results are as follows Figure 7 shown.

[0047] Control group 1: The powder is composed of copper oxide (CuO), the particle size is in the range of 100-300 mesh, spherical or almost spherical powder. The porosity is 8.94%. image 3 To use the powder as an auxiliary agent for underwater 1mm wet laser welding seam appearance, where the left side is the cross-sectional appearance of the weld seam, and the right side is the longitudinal section appearance of the weld seam.

[0048] Control group 2: The powder is composed of the following raw materials in parts by weight: 40 parts of copper oxide (CuO), and 9 parts of aluminum (Al). The CuO and Al powders are uniformly mixed according to the above mass percentages, a...

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Abstract

The invention discloses an auxiliary agent for laser welding, an application thereof and a welding method. The auxiliary agent for laser welding is composed of the following raw materials of, in partsby weight, 35-45 parts of copper oxide, 6-9 parts of aluminum, 19-25 parts of calcium fluoride, and 24-30 parts of calcium carbonate. By means of the auxiliary agent for laser welding, effective welding of an underwater wet-method laser welding technology at the water depth of 8 mm or below can be achieved, meanwhile, defects, namely, internal air holes of welding seams, generated through wet-method welding can be effectively reduced, and the welding seams can be protected. The auxiliary agent for welding is adopted for carrying out underwater wet-method laser welding, the porosity can be greatly reduced, and the porosity can reach 0.5% at the lowest, so that the underwater wet-method welding quality is effectively improved.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to an auxiliary agent for laser welding, its application and a welding method. Background technique [0002] With the full development of the national marine strategy, there are more and more oil and gas pipelines such as subsea oil fields, natural gas and marine projects, and underwater welding technology has been more and more used in marine projects, assembly and maintenance of marine projects. In the routine training of ships and amphibious equipment, emergency repairs and salvage operations at sea, underwater welding is also a very important technical means. Especially for many nuclear power plants currently in service, as the service time gradually increases, the internal components of the reactor begin to appear corrosion, fatigue and stress corrosion cracks, etc., and underwater welding maintenance is required. [0003] Wet welding is the most convenient and widely used we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/24B23K26/70B23K35/362
CPCB23K26/24B23K26/702B23K35/362
Inventor 蔡志海尤家玉秦航朱加雷王凯刘军柳建郭杰杜娴王思捷乔玉林孙晓峰
Owner ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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