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A thick wire single power source shallow penetration high-efficiency submerged arc automatic surfacing welding process method

A technology of automatic surfacing welding and process method, which is applied in the direction of arc welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of single wire submerged arc welding with large penetration depth and narrow fusion width, and achieve high current density and enlarged weld bead Wide fusion and low welding cost

Active Publication Date: 2021-02-02
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of large penetration depth and narrow fusion width of single wire submerged arc welding in the prior art, and to provide a thick wire single power source shallow penetration high-efficiency submerged arc automatic surfacing process, which can use ordinary submerged arc welding Arc welding uses a single power source for surfacing welding to achieve shallow penetration and wide bead welding effects, and can well meet the requirements of weld bead forming

Method used

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  • A thick wire single power source shallow penetration high-efficiency submerged arc automatic surfacing welding process method
  • A thick wire single power source shallow penetration high-efficiency submerged arc automatic surfacing welding process method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Welding wire preparation: choose 7 solid welding wires with a diameter of 2.0mm, take 1 as the central welding wire, and the remaining 6 are tightly wound around the central welding wire in a spiral shape to form a cable-type thick welding wire; the cable-type thick welding wire The diameter is 6.0mm, and the solid welding wire adopts the submerged arc cable welding wire whose specification is 316L stainless steel;

[0030] (2) Base metal pretreatment: grind and derust the base metal, then degrease with alcohol cleaning agent, and finally rinse with water and blow dry; perform welding work within 24 hours of pretreatment;

[0031] (3) Preheating: Preheat the base metal at 90°C; heat and dry the flux at 200°C for 2 hours; the flux is SJ101 sintered flux;

[0032] (4) Overlay welding: Send the welding wire prepared in step (1) into the welding area of ​​the submerged arc automatic trolley through the guide wire tube, connect the welding power source to transmit the we...

Embodiment 2

[0035] (1) Welding wire preparation: choose 7 solid welding wires with a diameter of 2.0mm, take 1 as the central welding wire, and the remaining 6 are tightly wound around the central welding wire in a spiral shape to form a cable-type thick welding wire; the cable-type thick welding wire The diameter is 6.0mm, and the solid welding wire adopts the submerged arc cable welding wire whose specification is 316L stainless steel;

[0036](2) Base metal pretreatment: grind and derust the base metal, then degrease with alcohol cleaning agent, and finally rinse with water and blow dry; perform welding work within 24 hours of pretreatment;

[0037] (3) Preheating: Preheat the base metal at 95°C; heat and dry the flux at 180°C for 2 hours; the flux is SJ101 sintered flux;

[0038] (4) Overlay welding: Send the welding wire prepared in step (1) into the welding area of ​​the submerged arc automatic trolley through the guide wire tube, connect the welding power supply to transmit the wel...

Embodiment 3

[0041] (1) Welding wire preparation: choose 7 solid welding wires with a diameter of 2.0mm, take 1 as the central welding wire, and the remaining 6 are tightly wound around the central welding wire in a spiral shape to form a cable-type thick welding wire; the cable-type thick welding wire The diameter is 6.0mm, and the solid welding wire adopts the submerged arc cable welding wire whose specification is 316L stainless steel;

[0042] (2) Base metal pretreatment: grind and derust the base metal, then degrease with alcohol cleaning agent, and finally rinse with water and blow dry; perform welding work within 24 hours of pretreatment;

[0043] (3) Preheating: Preheat the base metal at 90°C; heat and dry the flux at 200°C for 2 hours; the flux is SJ101 sintered flux;

[0044] (4) Overlay welding: Send the welding wire prepared in step (1) into the welding area of ​​the submerged arc automatic trolley through the guide wire tube, connect the welding power source to transmit the we...

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Abstract

The invention discloses a thick wire single power source shallow penetration high-efficiency submerged arc automatic surfacing welding process. The welding wire used is to wrap 6 thin welding wires around a central welding wire knob to form a spiral structure, and the prepared welding wire is sent into the welding wire through the wire guide tube. The welding area of ​​the submerged arc automatic trolley is connected to the welding power supply to transmit the welding current, so that the submerged arc automatic trolley moves along the joint of the base metal, and at the same time assists flux to the welding area until the surfacing is completed. The invention utilizes the mechanical rotation effect generated when each helical monofilament is fed to drive the welding arc to rotate, forcing the liquid molten pool to move perpendicular to the penetration depth direction to weaken the convective movement of the molten pool metal to the bottom, thereby reducing the molten metal to the bottom. The heat inside the pool is conducted across the width of the weld, reducing the amount of melting at the root of the pool and expanding the bead across its width. The process method realizes the shallow penetration of the cable-type welding wire with a diameter of 6.0mm, and the automatic surfacing welding of the wide bead submerged arc, and has a very high surfacing efficiency, and can also reduce the welding cost.

Description

technical field [0001] The invention belongs to the field of submerged arc surfacing welding, in particular to an automatic submerged arc surfacing welding process with thick wire single power source, shallow penetration depth and high efficiency. Background technique [0002] Surface modification methods such as thermal spraying, physical vapor deposition, and chemical vapor deposition have the best bonding strength due to the metallurgical bonding between the surfacing layer and the base material, and are widely used in pressure vessels in the industrial field. Manufacturing, shipbuilding and protection, and oil pipeline protection, etc. As an economical and convenient process for material surface modification, surfacing welding is especially suitable for large-area surface modification and repair of parts. In order to play the role of the surfacing layer most effectively, it is hoped that the surfacing welding method adopted has a small dilution effect of the base metal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/04B23K9/18B23K9/235
CPCB23K9/04B23K9/188B23K9/235
Inventor 李晓泉林皓陈一鑫成家林时振
Owner NANJING INST OF TECH
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