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Oil-coated passivation film galvanized steel sheet welding process

A galvanized steel sheet, welding process technology, applied in welding medium, welding equipment, welding equipment and other directions, can solve the problem of unfavorable oil-coated passivation film galvanized steel sheet welding, oil-coated passivation film galvanized steel sheet welding difficulty, welding effect It can achieve the effect of good welding effect, low cost, high efficiency and high degree of automation

Inactive Publication Date: 2020-11-03
PANGANG GROUP RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The welding between oil-coated galvanized steel sheets is usually manual arc full welding. Since there is a layer of oil-coated passivation film on the surface of oil-coated galvanized steel sheets, the surface of oil-coated galvanized steel sheets The zinc layer has a very low melting point and low hardness, which brings certain difficulties to welding between oil-coated passive film galvanized steel sheets, poor welding effect, and low welding efficiency, which is not conducive to large-scale oil-coated passive film galvanized steel sheets. welding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] When welding oil-coated passive film galvanized steel sheets, resistance spot welding is used for welding. The equipment and parameters for resistance spot welding are as follows: the welding machine is a single-phase rectifying DC spot welding machine, and the electrode material is Cr -Zr-Cu alloy, the diameter of the electrode end face is 6mm, the welding current is 9.9kA, the spot welding time is 1.2s, and the electrode pressure is 2.5kN.

[0017] After the welding is completed, the nugget diameter of the spot welded joint is 3.36mm. The shear resistance of the spot welded joint is tested, and the shear resistance of the spot welded joint is 2.086kN.

Embodiment 2

[0019] When welding oil-coated passive film galvanized steel sheets, resistance spot welding is used for welding. The equipment and parameters for resistance spot welding are as follows: the welding machine is a single-phase rectifying DC spot welding machine, and the electrode material is Cr -Zr-Cu alloy, the diameter of the electrode end face is 5mm, the welding current is 9.7kA, the spot welding time is 1s, and the electrode pressure is 2.5kN.

[0020] After the welding is completed, the nugget diameter of the spot welded joint is 3.12mm. The shear resistance of the spot welded joint is tested, and the shear resistance of the spot welded joint is 2.085kN.

Embodiment 3

[0022] When welding oil-coated passive film galvanized steel sheets, resistance spot welding is used for welding. The equipment and parameters for resistance spot welding are as follows: the welding machine is a single-phase rectifying DC spot welding machine, and the electrode material is Cr -Zr-Cu alloy, the diameter of the electrode end face is 6mm, the welding current is 10.2kA, the spot welding time is 1.2s, and the electrode pressure is 2.5kN.

[0023] After the welding is completed, the nugget diameter of the spot welded joint is 3.94mm. The shear resistance of the spot welded joint is tested, and the shear resistance of the spot welded joint is 2.291kN.

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Abstract

The invention relates to the technical field of galvanized steel sheet welding, in particular to an oil-coated passivation film galvanized steel sheet welding process. Oil-coated passivation film galvanized steel sheets are welded through a resistance spot welding mode; and equipment and parameters thereof during resistance spot welding are that a welding machine is a single-phase rectification type direct-current spot welding machine, an electrode is made of a Cr-Zr-Cu alloy, the diameter range of the end face of an electrode is 5-7 mm, the welding current range is 9.7-11.0 kA, the time rangeof each time of spot welding is 1-1.8 s, and the electrode pressure range is 2.5-3.5 kN. By the adoption of the resistance electric welding process, the nugget diameter of each spot-welded joint ranges from 3.1-4.5 mm, a nugget of each spot-welded joint meets the standard requirement, the shear resistance of each spot-welded joint is detected, the shear resistance of each spot-welded joint is larger than 2.0 kN, the shear resistance is better, the welding effect is remarkably improved, and welding of the large-scale oil-coated passivation film galvanized steel sheets is facilitated.

Description

technical field [0001] The invention relates to the technical field of welding between galvanized steel sheets, in particular to a welding process between galvanized steel sheets with an oil-coated passivation film. Background technique [0002] Hot-dip galvanized steel sheets are widely used in machinery manufacturing, construction, and home appliances. However, the galvanized layer still has corrosion and rust in humid environments. An effective way to solve this problem is to passivate the galvanized layer. At present, the common passivation treatment of galvanized steel sheet is to process a layer of oil-coated passivation film on its surface to form an oil-coated passivation film galvanized steel sheet. Oil is a commonly used lubricating oil, mainly composed of base oil and additives. Composition, the oil-coated passivation film layer has good corrosion resistance. The welding between oil-coated galvanized steel sheets is usually manual arc full welding. Since there is...

Claims

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Application Information

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IPC IPC(8): B23K11/11B23K35/02B23K35/24
CPCB23K11/11B23K35/0261B23K35/24
Inventor 周磊磊余腾义靳阳王亮赟郭太雄冉长荣
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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