Metal bar inner core type self-propagating welding pen and preparation method thereof

A technology of self-propagating welding and metal rods, which is applied in metal processing equipment, welding equipment, aluminothermic welding equipment, etc., can solve the problems of low liquid metal yield, large metal loss ratio, increased use cost, etc., and achieves low price , less metal loss, and improved strength

Active Publication Date: 2019-09-27
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent 20110126018.2 discloses a portable soldering pen and its preparation method, which uses CuO powder and Al powder as exothermic agents, CaF 2 and CaSO 4 As slagging agents, ferromanganese powder and ferronickel powder are used as alloying agents. Although the materials and structures used in this patent can meet the welding requirements under emergency conditions, the reaction process is violent because the reaction raw materials are all fine-grained powders. The proportion of metal loss is large, and the rate of liquid metal gain is low, which increases the cost of use
Patent 201210159201.7 discloses a simple electroless soldering pen, which also has the problem of too violent reaction and more metal loss

Method used

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  • Metal bar inner core type self-propagating welding pen and preparation method thereof
  • Metal bar inner core type self-propagating welding pen and preparation method thereof
  • Metal bar inner core type self-propagating welding pen and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The medicine tube is a paper medicine tube with a diameter of 12mm and a length of 200mm; the inner core of the metal rod is an iron rod with a diameter of 4.0mm and a length of 200mm; the thermite composition is CuO powder 68.0wt.%, Al powder 16.0wt.%, CaF 2 Powder 4.2wt.%, B powder 0.8wt.%, SiO 2 Fe powder 5.6wt.%, Fe powder 2.4wt.%, NiO powder 3.0wt.%. After the welding pen is prepared according to the above preparation process, two Q235 plates of 100mm×40mm×5mm are flat-plate butt welded. 7mm / s. The welding process is stable and controllable, and the surface welding slag is removed after welding, and the weld seam is well formed.

Embodiment 2

[0032] The medicine tube is a paper medicine tube with a diameter of 10mm and a length of 150mm; the inner core of the metal rod is a copper rod with a diameter of 3.8mm and a length of 150mm; the thermite composition is CuO powder 70.0wt.%, Al powder 15.0wt.%, CaF 2 Powder 4.5wt.%, B powder 1.0wt.%, SiO 2 Fe powder 4.6wt.%, Fe powder 2.2wt.%, NiO powder 2.7wt.%. After the welding pen is prepared according to the above preparation process, two copper plates of 100mm×40mm×5mm are flat-plate butt-welded, the welding direction is tilted backward, the welding inclination is about 70°, the welding rod flame length is controlled at about 5mm, and the welding speed is 8mm / s. The welding process is stable and controllable, and the surface welding slag is removed after welding, and the weld seam is well formed.

Embodiment 3

[0034] The medicine tube is a paper medicine tube with a diameter of 12.5mm and a length of 180mm; the inner core of the metal rod is an iron rod with a diameter of 4.2mm and a length of 180mm; the thermite composition is CuO powder 67.0wt.%, Al powder 18.0wt.%, CaF 2 Powder 5.0wt.%, B powder 0.6wt.%, SiO 2 Fe powder 4.9wt.%, Fe powder 2.0wt.%, NiO powder 2.5wt.%. After the welding pen is prepared according to the above preparation process, two pieces of 70mm×25mm×5mm stainless steel are plate butt welded, the welding direction is backward tilted, the welding inclination is about 70°, the welding rod flame length is controlled at about 5mm, and the welding speed is 7mm / s. The welding process is stable and controllable, and the surface welding slag is removed after welding, and the weld seam is well formed.

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Abstract

The invention discloses a metal bar inner core type self-propagating welding pen and a preparation method thereof. The welding pen comprises a papery agent pipe, a clamping end and a pen barrel. A metal (iron, copper and the like) bar inner core is arranged in the middle of the agent pipe. The space between the metal bar inner core and the agent pipe is filled with a thermite. Components comprise, by weight, 60.0%-75.0% of CuO powder, 15.0%-25.0% of Al powder, 4.0%-6.0% of CaF2 powder, 0.5%-1.5% of B powder, 4.0%-8.0% of SiO2 powder, 2.0%-5.0% of Fe powder and 2.5%-6.0% of NiO powder. When the welding pen is used, high heat released by the thermite is used for melting the metal bar inner core, and generated molten metal serves as deposited metal for welding. By means of the metal bar inner core type structure, the strength of the agent pipe is improved, a reaction is more stable, and metal losses in the reaction process are reduced.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a welding technology for welding steel and copper materials in emergency situations, in particular to a metal rod inner core type self-propagating welding pen and a preparation method thereof. Background technique [0002] Welding technology is one of the important means for industrial, civilian machinery and military equipment manufacturing, emergency repair and emergency maintenance and installation, but the electrode arc welding commonly used at present requires a power supply with an output power of more than one kilowatt and a heavy electric welding machine, while gas welding needs to store oxygen The high-pressure special equipment for acetylene gas involves a lot of engineering, and the operator needs to receive special training. This greatly restricts the maneuverable, flexible and efficient deployment of emergency welding repair tasks under special circumstances such as p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K23/00
CPCB23K23/00
Inventor 张国栋龚卓周怡成王麒瑜朱龙强刘延东梅青松张建强
Owner WUHAN UNIV
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