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Portable underwater wet-method non-electric welding method

A welding method and portable technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of inability to meet the needs of maneuverability, limit the flexibility of welding maneuvers, danger of electric shock in underwater arc welding, etc., and achieve recovery. The effect of equipment combat effectiveness, extended docking maintenance cycle, and strong adaptability

Inactive Publication Date: 2018-10-23
PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Neither of the above two methods can meet the requirements for the flexibility of welding operations in emergency repairs of ships under battlefield conditions.
Wet welding is to directly weld the workpiece in water. Compared with dry and partial dry welding, it has the advantages of simple equipment, low cost, flexible operation, and strong adaptability. Flux-cored arc welding and flux-cored arc welding are both inseparable from high-power power sources. Welders need to drag long cables when diving and welding, and the welding machine is heavy, which limits the flexibility of welding, and underwater arc welding has the risk of electric shock. Therefore, these welding methods cannot meet the needs of flexibility in the emergency welding of ships and marine facilities on the battlefield and in emergency situations.
[0004] The invention provides a portable underwater wet electroless welding method. The underwater welding only needs special electrodes for underwater electroless welding without other external energy sources and equipment, and is easy to carry, easy to operate, and can be used in situ and reliably. The emergency welding maintenance of underwater damaged metal components can effectively solve the problems of heavy equipment, inseparable power supply, and poor mobility in existing underwater welding methods.

Method used

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Embodiment 1

[0031] This embodiment provides an underwater emergency welding method for performing wet electroless welding on a 5mm thick Q235 steel plate. The welding material used is a special electrode for underwater electroless welding. For its structure, please refer to figure 1 with figure 2 .

[0032] Calculated by weight, Al powder 5g (-250 mesh), Mg powder 3g (-250 mesh), B powder 2g (-200 mesh), CuO powder 35g (-200 mesh), Fe 2 o 3 Powder 15g (-200 mesh), SiO 2 Powder 1.2g (-100 mesh), Cr 2 o 3 Powder 2g (-200 mesh), CaO powder 1.5g (-80 mesh), CaF 2 Powder 2g (-160 mesh), CaCO 3 Powder 1.5g (-160 mesh), W powder 1g (-200 mesh), CrFe powder 2g (-80 mesh), MnFe powder 1.5g (-80 mesh), TiFe powder 1.2g (-80 mesh), KNO 3 1g of powder (-80 mesh), mixed evenly in a three-dimensional mixer, baked at 200°C for 2 hours, pressurized and formed on a paper shell 4 with a diameter of 16mm and a length of 160mm, with a plastic or steel cylindrical plug 1 installed at one end , form ...

Embodiment 2

[0036] This embodiment provides an underwater emergency welding method for performing wet electroless welding on a 3 mm thick E32 marine structural steel plate. The welding material used is a special electrode for underwater electroless welding. For its structure, please refer to figure 1 with figure 2 .

[0037] Calculated by weight, Al powder 4.1g (-250 mesh), Mn powder 1.4g (-250 mesh), B powder 2.1g (-200 mesh), CuO powder 19.4g (-200 mesh), Fe 2 o 3 Powder 11g (-200 mesh), ZrO 2 Powder 4g (-200 mesh), SiO 2 Powder 1.2g (-100 mesh), Cr 2 o 3 Powder 1g (-200 mesh), CaO powder 0.8g (-80 mesh), NaF powder 1.2g (-160 mesh), CaCO 3 Powder 1g (-160 mesh), W powder 0.5g (-200 mesh), CrFe powder 0.5g (-80 mesh), MnFe powder 1.2g (-80 mesh), Ni powder 1g (-160 mesh), SiFe powder 0.8 g(-80 mesh), KNO 3 Powder 0.5g (-80 mesh), mix evenly in a three-dimensional mixer, bake at 200°C for 2 hours, press and form a paper shell with a diameter of 11mm and a length of 160mm with a...

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Abstract

The invention discloses a portable underwater wet-method non-electric welding method. The portable underwater wet-method non-electric welding method is suitable for emergency welding and maintenance of ships and ocean engineering underwater structures in emergency situations such as battlefields. The method can be used for underwater welding, and only needs a special welding rod for underwater power-free welding; and the welding rod is composed of a medicine column, a shell, a waterproof layer, a plug and an ignition part, the diameter of the welding rod is 10-25 mm, and the length of the welding rod is 100-300 mm; and other external energy and equipment is not needed during welding, the portable underwater wet-method non-electric welding method is convenient to carry and simple to operate, and can be used in situ, underwater damage metal components can be reliably welded and repaired, and the problems that an existing underwater welding method is heavy, a power source is not open andthe maneuvering flexibility is poor can be effectively solved.

Description

technical field [0001] The invention relates to a welding method, in particular to a portable underwater wet electroless welding method which utilizes a special underwater electroless welding electrode for wet welding. Background technique [0002] Underwater welding is an indispensable and important technological means in the construction, installation and maintenance of marine engineering structures, and it is also one of the essential technologies for naval ship emergency repairs in wartime and peacetime maritime repairs. [0003] Underwater welding is divided into three categories according to the welding environment: dry welding, partial dry welding and wet welding. Dry welding is carried out in a pressure chamber or working room. Gas is used to drain the water in the chamber. The welder performs welding in a dry or relatively dry environment. The welding environment is similar to that of land welding, and it is easy to achieve high welding quality. The equipment needs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/00B23K9/235
CPCB23K9/0061B23K9/235
Inventor 李志尊孙立明韩凤起辛文彤韩校粉马云鹤
Owner PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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