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A kind of fusion-brazing composite weld of weathering steel and its welding method

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: 2022-07-15
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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  • A kind of fusion-brazing composite weld of weathering steel and its welding method
  • A kind of fusion-brazing composite weld of weathering steel and its welding method
  • A kind of fusion-brazing composite weld of weathering steel and its welding method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0038] The welding 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 the 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: Adopt CO 2 Gas shielded welding is used to weld the filling layer. The welding wire is 1.2mm diameter THQ-60C low alloy steel welding wire, which meets the requirements of the ER60-G type welding wire specified in the national standard GB / T 8110-2008; the welding current is 210A, the welding voltage is 22V, The welding speed is 38cm / min, and the welding heat input is 7.29kJ / cm.

[0043] Step 5: At CO 2The 13mm pos...

Embodiment 2

[0044] Example 2: 6mm thickness steel plate butt joint

[0045] The welding 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 Al-Si 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: Adopt CO 2 Gas shielded welding is used to weld the filler layer. The welding wire is 1.2mm diameter THQ-60D low-alloy steel welding wire, which meets the requirements of the ER55-D2-Ti type welding wire specified in the national standard GB / T 8110-2008; the welding current is 235A, and the welding Voltage 25V, welding speed 29cm / min, welding heat input 12.16kJ / cm.

[0050] Step 5: At CO 2 The 10mm bac...

Embodiment 3

[0051] Example 3: 9mm thickness steel plate butt joint

[0052] The welding steps are as follows

[0053] Step 1: Make an X-shaped groove on the plate to be welded, the groove 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 welded plate, and reserve a groove gap of 0.5~1mm;

[0056] Step 4: Adopt CO 2 Gas shielded welding is used to weld the filling layers on both sides. The welding wire is 1.2mm diameter THQ-60C low-alloy steel wire, which meets the requirements of the ER60-G type welding wire specified in the national standard GB / T 8110-2008; welding current is 220~225A , Welding voltage 23~24V, welding speed 32~33cm / min, welding heat input 9.4~9.9kJ / cm.

[0057] Step 5: At CO 2 The 13mm rear of the gas shielded welding torch is filled with 1.2mm specification 4045 aluminum-silicon wel...

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Abstract

The invention discloses a fusion-brazing composite weld of weathering steel and a welding method thereof, comprising an inner low-alloy steel filling layer and an outer aluminum-silicon alloy capping layer and / or sealing layer; the welding of the filling layer The material is a low-alloy steel wire, obtained by gas shielded welding; the cover layer and / or the sealing layer is an aluminum-silicon welding material, obtained by using the residual heat of fusion welding or the brazing technology of adding a low-power auxiliary heat source, the filling layer and The adjacent cover layer and / or cover layer are welded in the same pass. This weld adopts low-alloy steel and aluminum alloy composite weld. The inner low-alloy steel filling layer has excellent mechanical properties, and the outer aluminum-silicon alloy cover layer (sealing layer) has good corrosion resistance, which can make Welded joints have both good mechanical properties and corrosion resistance, and can significantly reduce the cost of welding materials and have high production efficiency.

Description

technical field [0001] The invention belongs to the field of welding, in particular to a fusion-brazing composite weld of weathering steel and a welding method thereof. Background technique [0002] For the welding of weathering steel, ensuring the weatherability of the weld area is the key and the difficulty. If the weld area cannot reach the same weatherability 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 into play. At present, the commonly used method is to select a welding wire with a weathering coefficient similar to or higher than that of the base metal of the weathering steel to weld the weathering steel. During the welding process, there will be ablation of the elements, and there will be a certain stress in the weld area. Even if the weathering steel is selected It is also difficult to guarantee the weather resistance of the welding seam of ...

Claims

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Application Information

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Patent Type & Authority Patents(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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