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Melting-brazing composite weld joint of weathering resistant steel and welding method of melting-brazing composite weld joint

A composite welding seam and welding method technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of slow sealing bottom layer, high cost of stainless steel, no advantages in cost and production efficiency, etc., and achieve high production efficiency, Excellent weather resistance, saving welding passes

Active Publication Date: 2021-11-16
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the high cost of stainless steel and the slow speed of argon arc welding for the bottom seal, although this solution can provide better corrosion resistance protection, it has no advantages in terms of cost and production efficiency

Method used

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  • Melting-brazing composite weld joint of weathering resistant steel and welding method of melting-brazing composite weld joint
  • Melting-brazing composite weld joint of weathering resistant steel and welding method of melting-brazing composite weld joint
  • Melting-brazing composite weld joint of weathering resistant steel and welding method of melting-brazing composite weld joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: 4mm thick steel plate butt joint

[0038] The soldering steps are as follows:

[0039] Step 1: Make a V-shaped groove on the plate to be welded, the groove angle is 70°, and the blunt edge is 1mm, such as figure 1 shown;

[0040] Step 2: Grind the groove of the welded plate and the 25mm range on both sides until the metallic luster is exposed;

[0041] Step 3: Assemble 1.2mm specification 4043 aluminum-silicon welding wire at the blunt edge position, and perform spot welding positioning after the welding wire is clamped;

[0042] Step 4: Using CO 2 Gas shielded welding is used to weld the filling layer. The welding wire is THQ-60C low-alloy steel welding wire with a diameter of 1.2mm. This welding wire meets the requirements of the ER60-G welding wire specified in the national standard GB / T 8110-2008; The welding speed is 38cm / min, and the welding heat input is 7.29kJ / cm.

[0043] Step 5: At CO 21.2mm specification 4043 aluminum-silicon welding wire is ...

Embodiment 2

[0044] Example 2: Butt joint of 6mm thick steel plates

[0045] The soldering steps are as follows:

[0046] Step 1: Make a V-shaped groove on the plate to be welded, the groove angle is 55°, and the blunt edge is 1.5mm, such as figure 1 shown;

[0047] Step 2: Grind the groove of the welded plate and the 25mm range on both sides until the metallic luster is exposed;

[0048] Step 3: Assemble 1.2mm specification 4043 aluminum-silicon welding wire at the blunt edge position, and perform spot welding positioning after the welding wire is clamped, such as figure 1 shown;

[0049] Step 4: Using CO 2 The gas shielded welding is used to weld the filling layer separately. The welding wire is THQ-60D low-alloy steel welding wire with a diameter of 1.2mm. The voltage is 25V, the welding speed is 29cm / min, and the welding heat input is 12.16kJ / cm.

[0050] Step 5: At CO 2 1.2mm specification 4045 aluminum-silicon welding wire is fed at 10mm behind the gas shielded welding torch, ...

Embodiment 3

[0051] Example 3: Butt joint of 9mm thick steel plates

[0052] The welding steps are as follows

[0053] Step 1: Make an X-shaped bevel on the plate to be welded, the bevel angle is 60°, and the blunt edge is 1mm, such as image 3 shown;

[0054] Step 2: Grind the groove of the welded plate and the 25mm range on both sides until the metallic luster is exposed;

[0055] Step 3: Perform tack welding on the welding plate, and reserve a groove gap of 0.5~1mm;

[0056] Step 4: Using CO 2 Gas shielded welding is used to weld the filling layer on both sides. The welding wire is THQ-60C low-alloy steel welding wire with a diameter of 1.2mm. , welding voltage 23~24V, welding speed 32~33cm / min, welding heat input 9.4~9.9kJ / cm.

[0057] Step 5: At CO 2 The 1.2mm specification 4045 aluminum silicon welding wire is filled at 13mm behind the gas shielded welding torch. At the same time, argon gas purging is used to promote the wetting of the filling layer. The welding voltage is 14V...

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Abstract

The invention discloses a melting-brazing composite weld joint of weathering resistant steel and a welding method of the melting-brazing composite weld joint. The melting-brazing composite weld joint comprises an inner low-alloy steel filling layer and an outer aluminum-silicon alloy covering layer and / or a bottom sealing layer. A welding material of the filling layer is a low-alloy steel welding wire and is obtained through gas shielded welding; and the covering layer and / or the bottom sealing layer are / is made of aluminum-silicon welding materials and are / is obtained through a braze coating technology of utilizing fusion welding waste heat or increasing a small-power auxiliary heat source, and the filling layer and the covering layer and / or the bottom sealing layer close to the filling layer are / is welded in the same pass. The low-alloy steel and aluminum alloy composite weld joint is adopted, the inner low-alloy steel filling layer has excellent mechanical performance, the outer aluminum-silicon alloy covering layer (bottom sealing layer) has good corrosion resistance, the weld joint can have good mechanical performance and corrosion resistance, meanwhile, the welding material cost can be obviously reduced, and the production efficiency is relatively high.

Description

technical field [0001] The invention belongs to the field of welding, in particular to a melting-brazing composite welding seam of weathering steel and a welding method thereof. Background technique [0002] For the welding of weather-resistant steel, ensuring the weather resistance of the weld area is the key and the difficulty. If the weld area cannot achieve the same weather resistance as the base metal, corrosion will first occur at the weld and affect the overall use of the structure Life, so that the advantages of weathering steel can not be brought out. At present, the commonly used method is to select a welding wire with a weather resistance coefficient similar to or higher than that of the base metal of weather resistance steel for welding of weather resistance steel, and there will be ablation of elements during the welding process, and there will be a certain stress in the weld area, even if the weather resistance steel is selected It is also difficult to guarant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02B23K33/00
CPCB23K28/02B23K33/00
Inventor 潘进陈振业刘宏强孙力马成赵兴科高雅徐腾飞魏浩石帅
Owner HEBEI IRON AND STEEL
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