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Welding method of Q460 high-strength steel

A welding method and high-strength steel technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve the problems of affecting service life, difficult welding, safety hazards, etc., to improve production efficiency, reliable and firm welding, and improve welding. The effect of seam toughness and quality

Inactive Publication Date: 2019-01-18
江苏振光电力设备制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Q460 is a low-alloy high-strength steel. Q460 high-strength steel is a new type of material used in the field of transmission line towers. Q460 high-strength steel can not only increase the load capacity of the tower, but also effectively reduce the weight of the tower material, save the overall cost, and improve power transmission. The bearing capacity of the iron tower, but Q460 has the disadvantages of being difficult to process and weld. If the welding process is not selected properly, it is easy to generate cracks at the stress concentration at the root of the weld, which will affect the service life and cause safety hazards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A welding method for Q460 high-strength steel, comprising steps as follows:

[0020] (1) Q460 high-strength steel adopts a single-sided bevel with a bevel angle of 40°. Grind and clean the bevel area to remove oil, rust, scale and other sundries, and spray flux on the bevel;

[0021] (2) Preheat the Q460 high-strength steel sprayed with ethanol to 10°C;

[0022] (3) Combine and fix the high-strength steel to be welded together so that the gap between the grooves is kept at 1mm;

[0023] (4) Backing welding, choose J557 electrode with a diameter of 4.0mm for argon gas shielded welding, keep low hydrogen conditions during the welding process, strictly dry the electrode before use, and the ambient temperature during welding is 20 ° 1 story;

[0024] (5) Submerged arc welding, using JM68 welding wire, diameter 3.2mm, welding current 250A; welding voltage 20V, welding speed 0.003m / s, when the plate thickness is 19mm, the heat input is controlled at 18kJ / cm;

[0025] (6) C...

Embodiment 2

[0027] A welding method for Q460 high-strength steel, comprising steps as follows:

[0028] (1) Q460 high-strength steel adopts a single-sided bevel, and the bevel angle is 60°. The bevel area is polished and cleaned to remove oil, rust, scale and other sundries, and spray flux on the bevel;

[0029] (2) Preheat the Q460 high-strength steel sprayed with butanol to 40°C;

[0030] (3) Combine and fix the high-strength steel to be welded together so that the gap between the grooves is kept at 2mm;

[0031] (4) Backing welding, choose J707 electrode with a diameter of 4.0mm for CO2 gas shielded welding, keep low hydrogen conditions during the welding process, strictly dry the electrode before use, and the ambient temperature during welding is 20°, and welding for backing welding 1 layer;

[0032] (5) Submerged arc welding, using JM68 welding wire, diameter 3.2mm, welding current 200A; welding voltage 24V, welding speed 0.005m / s, plate thickness 22mm, heat input control 35kJ / cm; ...

Embodiment 3

[0035] A welding method for Q460 high-strength steel, comprising steps as follows:

[0036] (1) Q460 high-strength steel adopts a single-sided bevel with a bevel angle of 50°. Grind and clean the bevel area to remove oil, rust, scale and other sundries, and spray flux on the bevel;

[0037] (2) Preheat the Q460 high-strength steel sprayed with acetone to 25°C;

[0038] (3) Combine and fix the high-strength steel to be welded together so that the gap between the grooves is kept at 1.5mm;

[0039] (4) Backing welding, choose J707 electrode with a diameter of 4.0mm for argon gas shielded welding, keep low hydrogen conditions during the welding process, strictly dry the electrode before use, and the ambient temperature during welding is 20° 1 story;

[0040] (5) Submerged arc welding, using JM68 welding wire, diameter 3.2mm, welding current 250A; welding voltage 22V, welding speed 0.004m / s, plate thickness 18mm, heat input controlled at 18kJ / cm;

[0041] (6) Cancellation of str...

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Abstract

The invention discloses a welding method of Q460 high-strength steel. The method comprises the steps of backing welding, submerged arc welding and the like. The toughness and quality of welding seamsare improved through the welding, and the situations that cracks are generated on the stress concentration part on the roots of the welding seams, the service life is affected and potential safety hazards are generated are better prevented. Meanwhile, the production efficiency is improved.

Description

technical field [0001] The invention relates to a welding method, in particular to a welding method for Q460 high-strength steel. Background technique [0002] Q460 is a low-alloy high-strength steel. Q460 high-strength steel is a new type of material used in the field of transmission line towers. Q460 high-strength steel can not only increase the load capacity of the tower, but also effectively reduce the weight of the tower material, save the overall cost, and improve power transmission. The bearing capacity of the iron tower, but Q460 has the disadvantages of being difficult to process and difficult to weld. If the welding process is not selected properly, it is easy to generate cracks at the stress concentration at the root of the weld, which will affect the service life and cause safety hazards. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention provides a welding method of Q460 high-strength steel, which...

Claims

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Application Information

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IPC IPC(8): B23K9/173B23K9/18B23K9/235
CPCB23K9/173B23K9/186B23K9/235
Inventor 汤世欣何海阳程国毫王泽宇丁斌
Owner 江苏振光电力设备制造有限公司
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