Angle welding method of high penetration and low spatter

A high-melting and fillet welding technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as easy formation of pores and inability to penetrate 10mm steel plates

Inactive Publication Date: 2018-10-09
张宇
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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 provide a fillet welding method with high penetration depth and high porosity resistance, which solves the problem that porosity is easily formed in the fillet weld of the existing steel plate with primer, and the 10mm steel plate cannot be penetrated, and the efficiency is improved while improving the welding quality

Method used

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  • Angle welding method of high penetration and low spatter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] The thickness of the steel plate at the horizontal position is 12mm.

[0070] The diameter of the solid cored wire is 1.6mm, and the diameter of the flux cored wire is 1.4mm. In terms of weight percentage, the Mn content of the solid wire is 0.4%, the Si content is 1.1%, Si+Mn=1.5%, and the Ti content is 0.08%; the S content in the flux-cored wire is 0.015%, and the boron content is 0.02%; °, which is 30° to the horizontal plane, and the posterior wire is inclined 7°, which is 45° to the horizontal plane.

[0071] The front and rear wire currents are 370 and 340A, the voltage is 28 and 34V, the wire feeding speed is 9 and 15m / min, the dry elongation is 11 and 25mm, and the welding speed is 1.2m / min.

[0072] Ultrasonic and metallographic inspection results: no defects such as pores were found, and full penetration.

[0073] The mechanical performance test results show that the performance is qualified.

Embodiment 2

[0075] The thickness of the steel plate at the horizontal position is 14mm.

[0076] The diameter of solid cored wire is 1.8mm, and the diameter of flux cored wire is 1.6mm. In terms of weight percentage, the Mn content of the solid wire is 0.2%, the Si content is 1.5%, Si+Mn=1.7%, and the Ti content is 0.12%; the S content in the flux-cored wire is 0.02%, and the boron content is 0.01%; °, 25° to the horizontal plane, 8° to the posterior wire, and 40° to the horizontal plane.

[0077] The front and rear wire currents are 390 and 350A, the voltage is 29 and 35V, the wire feeding speed is 9 and 16m / min, the dry elongation is 11 and 26mm, and the welding speed is 1.1m / min.

[0078] Ultrasonic and metallographic inspection results: no defects such as pores were found, and full penetration.

[0079] The mechanical performance test results show that the performance is qualified.

Embodiment 3

[0081] The thickness of the steel plate at the horizontal position is 16mm.

[0082] The diameter of the solid cored wire is 1.8mm, and the diameter of the flux cored wire is 1.8mm. In terms of weight percentage, the Mn content of the solid core wire is 0.1%, the Si content is 1.8%, Si+Mn=1.9%, and the Ti content is 0.2%; the S content in the flux-cored wire is 0.02%, and the boron content is 0.03%; °, which is 30° to the horizontal plane, and the posterior wire is inclined 7°, which is 45° to the horizontal plane.

[0083] The front and rear wire currents are 410 and 360A, the voltage is 30 and 38V, the wire feeding speed is 10 and 17m / min, the dry elongation is 11 and 24mm, and the welding speed is 1.0m / min.

[0084] Ultrasonic and metallographic inspection results: no defects such as pores were found, and full penetration.

[0085] The mechanical performance test results show that the performance is qualified.

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Abstract

The invention relates to an angle welding method of high penetration and a high against gas hole. The angle welding method of the high penetration and the low-spatter has the characteristics that themethod adopts CO2 protection welding with a front-wire solid-core welding wire and a back-wire flux-cored wire, the current is 300-450 A and 280-400 A, the voltage is 25-30 V and 28-40 V, the weldingspeed ranges from 0.8 m to 1.4 m / min, the length of the welding wire is 10-15 and 20-30 mm, and Mn content of the solid-core welding wire is less than or equal to 1.0%, the content of Si+Mn of the solid-core welding wire is larger than or equal to 1.0% and less than or equal to 2.5%, the content of Ti is 0.02-0.2%, the content of S in the flux-cored wire is 0.005-0.02%, and the content of boron is0.005-0.05%. The method is suitable for fillet welding seam welding of a steel plate with primer, full penetration of 12-16 mm thick plates can be achieved.

Description

technical field [0001] The invention relates to a fillet welding method, which belongs to the field of welding technology, in particular to a gas shielded welding method with high penetration depth and high porosity resistance suitable for fillet welds. Background technique [0002] Due to the long construction period and long process of structural parts used in shipbuilding and bridges, in order to prevent corrosion and rust of the steel plate, it is often necessary to coat the steel plate with a layer of primer to protect the steel plate. When conventional gas shielded welding is used, the primer on the surface of the steel plate evaporates at high temperature to form an air mass that easily remains in the welding pool, thereby forming defects. [0003] For the fillet welding of 12mm thick steel plate, twin-wire gas shielded welding is usually used; in order to increase efficiency, a combination of two flux-cored welding wires is usually used, and the diameter of the weldi...

Claims

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Application Information

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IPC IPC(8): B23K9/02B23K9/16B23K9/173
CPCB23K9/164B23K9/02B23K9/173
Inventor 张宇
Owner 张宇
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