Flux core improvement body of high-toughness carbon steel welding wire

Abstract

The utility model relates to the technical field of welding wires, and discloses a high-toughness carbon steel welding wire flux core improvement body which comprises a welding wire layer, a fluoride layer and an alloy layer, and the welding wire layer, the fluoride layer and the alloy layer are sequentially arranged on the welding wire from inside to outside and further comprises an additional protection layer. According to the high-toughness carbon steel welding wire flux core improvement body, the whole welding wire can be fully protected, more stable performance can be kept in the welding process, work and use are more convenient, and therefore the high-toughness carbon steel welding wire flux core improvement body is more practical.

Description

Technical Field

[0001] The utility model relates to the technical field of welding wires, in particular to an improved flux-cored carbon steel welding wire with high toughness. Background Art

[0002] Flux-cored wire is a tubular welding wire filled with a flux core or a metal powder mixture. The core composition is similar to that of the electrode coating and provides arc stabilization, deoxidation, desulfurization, denitrification, microalloying, improved weld profile, and protection of the weld pool from atmospheric oxidation. The concept of flux-cored wire was first proposed by Oscar Kjellberg, founder of ESAB. However, due to the limitations of the metallurgical chemistry and mechanical manufacturing industries at the time, its development was slow. It wasn't until the 1950s, when solid-cored wire exhibited shortcomings during CO2-shielded welding, such as excessive spatter, a tendency toward post-weld porosity, and poor weld profile, that research and application of flux-cored wire regained attention. Compared to solid-cored wire, flux-cored wire offers advantages such as improved process performance, aesthetically pleasing weld profiles, faster deposition rates, and higher production efficiency. Furthermore, flux-cored wire is highly adaptable to welding a wide range of steels, and the desired weld chemistry can be easily achieved by adjusting the flux composition and ratio.

[0003] The mechanical properties of flux-cored wire deposits are unstable, which is closely related to factors such as the wire manufacturing process, the uniformity of the powder filling rate, the powder composition, and its component segregation. This instability may cause the weld joint to break easily under dynamic loads or to suffer brittle fracture under low-temperature conditions.

[0004] In order to solve the above problems, during welding, the elements of the additional protective layer can be used to fully protect the entire welding process, so that the performance can be maintained more stable during the welding process and it is more convenient to use. For this purpose, we have proposed an improved high-toughness carbon steel welding wire core. Utility Model Content

[0005] (1) Technical problems solved

[0006] In view of the deficiencies in the prior art, the utility model provides an improved high-toughness carbon steel welding wire flux core, which solves the above-mentioned problems.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a high-toughness carbon steel welding wire flux cored improved body, comprising a welding wire layer, a fluoride layer, and an alloy layer, wherein the welding wire comprises the welding wire layer, the fluoride layer, and the alloy layer from the inside out, and further comprising:

[0009] An additional protective layer is provided on the outermost layer. The additional protective layer is provided with nano-aluminum oxide. The additional protective layer provides additional protection and reinforcement for the welding wire through the nano-aluminum oxide, greatly improving the practicality and making the welding wire more stable during use.

[0010] Preferably, the welding wire layer is made of high carbon steel, a trace amount of niobium and vanadium is added to the welding wire layer, and the thickness of the welding wire layer is 0.5 mm-1.0 mm.

[0011] Preferably, the fluoride layer includes a barium fluoride layer, a sodium fluoride layer, and an aluminum lanthanum fluoride layer, and the fluoride layers are sequentially barium fluoride layer, sodium fluoride layer, and aluminum lanthanum fluoride layer from the inside to the outside.

[0012] Preferably, the thickness of the barium fluoride layer, the sodium fluoride layer, and the aluminum lanthanum fluoride layer is 0.05 mm - 0.1 mm.

[0013] Preferably, the alloy layer includes a Mn layer, a Zr layer, and a Hf layer, and the alloy layer is sequentially composed of a Mn layer, a Zr layer, and a Hf layer from the inside to the outside.

[0014] Preferably, the thickness of the Mn layer is 0.1 mm - 0.2 mm, the thickness of the Zr layer is 0.05 mm - 0.1 mm, and the thickness of the Hf layer is 0.02 mm - 0.05 mm.

[0015] Preferably, the additional protective layer is composed of nano-sized aluminum oxide and yttrium oxide, and the thickness of the additional protective layer is 0.01 mm - 0.03 mm.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the present invention provides an improved high-toughness carbon steel welding wire flux core, which has the following beneficial effects:

[0018] 1. The improved high-toughness carbon steel welding wire flux core, through the careful design of the welding wire layer, fluoride layer, alloy layer and additional protective layer, enables the welding wire to form a more uniform and dense weld structure during the welding process, thereby improving the toughness and mechanical properties of the weld.

[0019] 2. The high-toughness carbon steel welding wire flux core modification, the introduction of elements such as Mn, Zr, Hf in the alloy layer, and the addition of trace amounts of niobium and vanadium in the welding wire layer can significantly improve the microstructure and mechanical properties of the weld, making the weld have higher strength and better toughness.

[0020] 3. The combination of the improved flux-cored high-toughness carbon steel welding wire and the additional protective layer not only provides an additional physical barrier to prevent damage to the welding wire during transportation, storage and use, but also enhances the wear resistance and corrosion resistance of the protective layer through the characteristics of nano-scale materials. It can maintain more stable performance during the welding process and reduce welding quality problems caused by environmental factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a schematic cross-sectional view of the utility model;

[0023] Figure 3 It is a side view schematic diagram of the utility model.

[0024] In the figure: 1. welding wire layer; 2. fluoride layer; 3. alloy layer; 4. barium fluoride layer; 5. sodium fluoride layer; 6. aluminum lanthanum fluoride layer; 7. Mn layer; 8. Zr layer; 9. Hf layer; 10. additional protective layer. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-3 A high-toughness carbon steel welding wire flux core improvement, comprising a welding wire layer 1, a fluoride layer 2, and an alloy layer 3. From the inside out, the welding wire is composed of the welding wire layer 1, the fluoride layer 2, and the alloy layer 3, and further comprises:

[0027] The additional protective layer 10 is provided on the outermost layer. The additional protective layer 10 is provided with nano-aluminum oxide. The additional protective layer 10 provides additional protection and strengthening for the welding wire through the nano-aluminum oxide, which greatly improves the practicality and makes the welding wire more stable during use.

[0028] Furthermore, the material of the welding wire layer 1 is high carbon steel, a trace amount of niobium and vanadium is added to the welding wire layer 1, and the thickness of the welding wire layer 1 is 0.5 mm-1.0 mm.

[0029] Furthermore, the fluoride layer 2 includes a barium fluoride layer 4, a sodium fluoride layer 5, and an aluminum lanthanum fluoride layer 6. From the inside to the outside, the fluoride layer 2 includes the barium fluoride layer 4, the sodium fluoride layer 5, and the aluminum lanthanum fluoride layer 6.

[0030] Furthermore, the thickness of the barium fluoride layer 4, the sodium fluoride layer 5, and the aluminum lanthanum fluoride layer 6 is 0.05 mm to 0.1 mm.

[0031] Furthermore, the alloy layer 3 includes a Mn layer 7, a Zr layer 8, and a Hf layer 9. From the inside to the outside, the alloy layer 3 includes the Mn layer 7, the Zr layer 8, and the Hf layer 9.

[0032] Furthermore, the thickness of the Mn layer 7 is 0.1 mm to 0.2 mm, the thickness of the Zr layer 8 is 0.05 mm to 0.1 mm, and the thickness of the Hf layer 9 is 0.02 mm to 0.05 mm.

[0033] Furthermore, the additional protective layer 10 is composed of nano-sized aluminum oxide and yttrium oxide, and the thickness of the additional protective layer 10 is 0.01 mm to 0.03 mm.

[0034] Working Principle: First, the welding wire layer 1 is made of high-carbon steel with trace amounts of niobium and vanadium added to enhance its strength and toughness. This layer forms the bulk of the welding wire, providing the necessary metal filler during welding. The fluoride layer 2 consists of a barium fluoride layer 4, a sodium fluoride layer 5, and a lanthanum aluminum fluoride layer 6, arranged in this order from the inside out. The barium fluoride layer 4, as the inner layer, provides arc stability and dehydrogenation. The sodium fluoride layer 5 provides additional protection, reducing oxidation and contamination during welding. The lanthanum aluminum fluoride layer 6, as part of the outermost layer, incorporates the rare earth element lanthanum (La), leveraging its unique physical and chemical properties to further enhance the purity and toughness of the weld. These fluoride layers form a protective barrier during welding, helping to prevent oxidation and contamination during welding while also improving the wire's corrosion resistance and wettability. The alloy layer 3 also consists of a manganese layer 7, a zirconium layer 8, and a helium layer 9, arranged in this order from the inside out. The Mn layer 7, as the basic alloy layer, provides the necessary manganese element to enhance the strength and toughness of the weld. The Zr layer 8 introduces zirconium, which is a rare but effective alloying element that can significantly improve the corrosion resistance and high-temperature strength of the weld. The Hf layer 9, as the outermost layer, has an extremely high melting point and good corrosion resistance, which can further improve the high-temperature stability and toughness of the weld. These alloying elements can further improve the mechanical properties of the welding wire, such as strength, hardness and toughness, and also help to improve the microstructure and mechanical properties of the weld joint. The outermost additional protective layer 10 is composed of nano-scale alumina and yttrium oxide. This layer provides additional protection and strengthening for the welding wire. Nano-scale alumina has high hardness and high wear resistance, which can effectively prevent the welding wire from being damaged during transportation, storage and use. At the same time, the addition of yttrium oxide may help to further improve the stability and corrosion resistance of the protective layer.

[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-toughness carbon steel welding wire flux core improvement, comprising a welding wire layer (1), a fluoride layer (2), and an alloy layer (3), characterized in that: The welding wire comprises, from the inside out, a welding wire layer (1), a fluoride layer (2), and an alloy layer (3), and is characterized in that it further comprises: An additional protective layer (10) is provided on the outermost layer, and the additional protective layer (10) is provided with nano-aluminum oxide. The additional protective layer (10) provides additional protection and reinforcement for the welding wire through the nano-aluminum oxide, greatly improving the practicality and making the welding wire more stable during use.

2. The improved high-toughness carbon steel welding wire flux core according to claim 1, characterized in that: The welding wire layer (1) is made of high carbon steel, a trace amount of niobium and vanadium is added to the welding wire layer (1), and the thickness of the welding wire layer (1) is 0.5 mm-1.0 mm.

3. The improved high-toughness carbon steel welding wire flux core according to claim 1, characterized in that: The fluoride layer (2) comprises a barium fluoride layer (4), a sodium fluoride layer (5), and an aluminum lanthanum fluoride layer (6). The fluoride layer (2) comprises the barium fluoride layer (4), the sodium fluoride layer (5), and the aluminum lanthanum fluoride layer (6) from the inside to the outside.

4. The improved high-toughness carbon steel welding wire flux core according to claim 3, characterized in that: The barium fluoride layer (4), the sodium fluoride layer (5), and the aluminum lanthanum fluoride layer (6) have a thickness of 0.05 mm to 0.1 mm.

5. The improved high-toughness carbon steel welding wire flux core according to claim 1, characterized in that: The alloy layer (3) comprises a Mn layer (7), a Zr layer (8), and a Hf layer (9), and the alloy layer (3) comprises the Mn layer (7), the Zr layer (8), and the Hf layer (9) from the inside to the outside.

6. The improved high-toughness carbon steel welding wire flux core according to claim 5, characterized in that: The thickness of the Mn layer (7) is 0.1 mm to 0.2 mm, the thickness of the Zr layer (8) is 0.05 mm to 0.1 mm, and the thickness of the Hf layer (9) is 0.02 mm to 0.05 mm.

7. The improved high-toughness carbon steel welding wire flux core according to claim 1, characterized in that: The additional protective layer (10) is composed of nano-scale aluminum oxide and yttrium oxide, and the thickness of the additional protective layer (10) is 0.01 mm to 0.03 mm.

Images