Electroslag welding repairing method for anode steel stud head

A technology of anode steel claws and repair methods, which is applied in the direction of welding/welding/cutting items, manufacturing tools, metal processing equipment, etc., can solve the problems of potential safety hazards, large footprint of welding equipment, large one-time investment, etc., and achieve welding High efficiency, high repair efficiency, and simple equipment

Active Publication Date: 2016-03-09
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Problems solved by technology

This method solves the problem of high resistivity around the welded joint to a certain extent, but the weldi

Method used

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  • Electroslag welding repairing method for anode steel stud head
  • Electroslag welding repairing method for anode steel stud head
  • Electroslag welding repairing method for anode steel stud head

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Embodiment Construction

[0026] The present invention will be described in more detail below through specific examples.

[0027] Aiming at the welding repair of the single-row four-claw head of an electrolytic aluminum factory in China, the material of the steel claw head is ZG230-450, the design diameter is φ180mm, the design length is 280mm, and the length of the burned section is 140mm.

[0028] The first step, preparation before welding

[0029] 1) Use gas cutting to completely remove the burnt section and end of the anode steel claw head 1 to be repaired, leaving 110 mm remaining, select a round steel rod 2 (length 136 mm) of the same material and diameter as the anode steel claw head, and Machining the surface to be welded of the anode steel claw head 1 and the round steel bar 2 to make the surface roughness Ra=6.3~12.5μm;

[0030] 2) Processing of welding groove and lead-out plate

[0031] According to the diameter of the anode steel claw head 1, select four cuboid steel plates with a size of...

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Abstract

The invention discloses an electroslag welding repairing method for an anode steel stud head. Firstly, a burnt section of the steel stud head is cut off, and a round steel bar which is identical with the steel stud head in material and diameter is selected; then, four rectangular steel plates are adopted, two rectangular steel plates are machined and then welded with a bottom plate to form a welding groove, the steel stud head and the round steel bar are placed on the welding groove, the other two steel plates are pressed on the welding groove in a covering mode to form runoff weld tabs, and the runoff weld tabs are welded on the upper portion and the lower portion of the steel stud head and the round steel bar; then, water-cooling sliding blocks are fixed to the other two side faces of the runoff weld tabs and the welding groove, and a consumable nozzle is fixed at the front end of a holding mechanism and adjusted to be located in the center of the welding groove; afterwards, welding is carried out after power-on through proper electroslag welding materials and processes; and finally, the runoff weld tabs and the welding groove are cut off, weld metal is ground to achieve smooth transition between the weld metal and the steel stud head and the round steel bar, and therefore the steel stud head is repaired. According to the electroslag welding repairing method, the steel stud head and the round steel bar are welded at a time, total cross-section metallurgical bonding is achieved, the connector strength is high, the specific resistance is low, the welding efficiency is high, and the composite repairing cost is greatly lowered.

Description

technical field [0001] The invention relates to the field of welding repair, in particular to an electroslag welding repair method for an anode steel claw head. Background technique [0002] Anode steel claws are frequently used equipment accessories in the electrolytic aluminum production process. Due to their long-term contact with electrolytic aluminum liquid, they are easily corroded in high-temperature and high-current operating environments, resulting in large consumption and heavy repair tasks. For a long time, domestic electrolytic aluminum enterprises have adopted the manual arc welding method for the repair of anode steel claws, that is, the traditional surrounding welding method. However, due to the limitations of the weldment groove processing and welding process, this welding method is not only inefficient, but also There are shortcomings such as small welding area, low joint strength, high resistivity, and short service life, which seriously affect and restrict...

Claims

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Application Information

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IPC IPC(8): B23K25/00B23K103/04
CPCB23K25/005B23K2103/04
Inventor 王星星李智勇李权才杜全斌魏巍冯晓强李兰伟
Owner NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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