Rolled welding wire categories and introduction

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1. Introduction to Rolled welding wire

Rolled welding wire is a welding wire made through a mechanical rolling process and is used in various welding processes, such as MIG/MAG welding, TIG welding and submerged arc welding. The production process of this type of welding wire involves repeated rolling and stretching of the metal blank to ensure that the wire has a uniform diameter, a smooth surface, and appropriate mechanical properties. Rolled welding wire can be made of a variety of materials, including carbon steel, stainless steel, aluminum, copper, nickel-based alloys, etc., and the size range is generally between 0.6 mm and 4 mm. Due to its high strength, good weldability and precision, Rolled welding wire is widely used in manufacturing, construction, automobile industry and other fields.

2. Introduction to types of Rolled welding wire

Rolled welding wire is a welding wire made through a mechanical rolling process and is used in a variety of welding processes, such as MIG/MAG welding, TIG welding and submerged arc welding. These welding wires can be subdivided into various types based on different materials, sizes and applications. The following are the main classifications of rolled welding wires and their detailed descriptions:

(1) Solid welding wire

Solid welding wire is the most common rolled welding wire and is made of a single metal material with no filler inside. Depending on the material, solid welding wire is divided into the following categories:

① Carbon steel welding wire: used for welding carbon steel and low alloy steel. Common models include ER70S-6, ER70S-3, ER70S-2, etc. These wires are commonly used for MIG/MAG welding and have high strength and weldability.

②Stainless steel welding wire: used for welding stainless steel materials. Common models include ER308L, ER316L, ER309L, etc. They are widely used in TIG welding and MIG/MAG welding, often in areas such as chemical industry, food processing and medical equipment where high corrosion resistance is required.

③Aluminum welding wire: used for welding aluminum and aluminum alloys. Common models include ER4043, ER5356, etc. Aluminum welding wire has good electrical conductivity and oxidation resistance and is commonly used in manufacturing and aerospace fields.

④Copper welding wire: used for welding copper and copper alloys. Common models include ERCu, ERCuSi-A, etc. Copper welding wire is widely used in welding copper pipes, copper products and electronic equipment.

⑤Nickel-based welding wire: used for welding nickel and nickel-based alloys. Common models include ERNiCrMo-3, etc. This type of welding wire is suitable for high temperature and highly corrosive environments and is commonly used in the petrochemical and aviation industries.

(2) Flux cored wire

Flux-cored wire is filled with flux or alloy powder and does not require external gas protection or provide special welding characteristics during welding. There are many types of flux-cored wire depending on the application and material:

① Carbon steel flux-cored welding wire: such as E71T-1, E71T-11, etc. This type of welding wire is used for MIG/MAG welding, provides good welding performance, and is suitable for field operations and scenes without gas protection.

② Stainless steel flux-cored welding wire: such as E308LT1, E316LT1, etc. Suitable for stainless steel welding, often used in construction and heavy machinery manufacturing fields.

③ Submerged arc welding flux cored wire: such as EM12K, EH12K, etc. This type of welding wire is used for submerged arc welding and is suitable for thick plate welding and large structure welding.

(3) Other types

①Alloy welding wire: used for welding specific alloys, including titanium alloys, zirconium alloys, etc. This type of welding wire is widely used in aerospace and high-tech manufacturing.

② Low hydrogen welding wire: Welding wire with low hydrogen content, suitable for preventing welding cracks and improving welding quality.

3. Advantages and disadvantages of Rolled welding wire

Rolled welding wire is made through mechanical rolling process and is widely used in the welding industry. Like other types of welding wire, rolled wire has its advantages and disadvantages. The following is a detailed analysis:

(1) Advantages

① High precision and uniformity: Rolled welding wire is mechanically rolled and stretched during the production process to make its diameter and surface quality uniform. This high-precision process ensures the stability of the welding wire and helps improve welding quality.

②Diverse material selection: Rolled welding wire can be made of a variety of materials, including carbon steel, stainless steel, aluminum, copper, nickel-based alloys, etc. This diversity allows welding of a variety of different metal materials to meet the needs of different industries.

③Wide range of applications: Due to the diversity of Rolled welding wire, it can be applied to various welding processes, including MIG/MAG welding, TIG welding, submerged arc welding, etc. This makes rolled welding wire widely used in many fields such as manufacturing, construction, and the oil and gas industry.

④Adapt to different welding conditions: Rolled welding wire can adapt to various welding conditions, including outdoor, complex geometric structures and automated welding. This flexibility makes it ideal for industrial welding.

⑤Efficient welding performance: Rolled welding wire provides a stable arc and good welding performance during the welding process, reducing welding defects and improving production efficiency.

(2) Disadvantages

①Dependence on the production process: The production process of Rolled welding wire requires high-precision mechanical technology. If the production process is unstable, it may lead to uneven diameter of the welding wire or surface defects, thus affecting the welding quality.

②Limited special application capabilities: Although rolled welding wire is suitable for a variety of welding processes, it may not be as effective as other welding wires in some special applications. For example, in extreme environments such as high temperatures and high corrosion, some rolled welding wires may not be as durable as specialized welding wires.

③ Spatter may occur during welding: In MIG/MAG welding, rolled welding wire may produce welding spatter, which increases the complexity of post-welding treatment.

④Gas protection may be required: Solid welding wire usually requires gas protection in MIG/MAG welding, which may be inconvenient in some environments, while flux-cored welding wire can be used without gas protection.

⑤The price may be higher: Due to the high precision and diversity of Rolled welding wire, the cost of some welding wires may be higher, especially high-grade stainless steel welding wire or nickel-based welding wire.

4. Welding process of Rolled welding wire

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(1) MIG/MAG welding

MIG (Metal Inert Gas)/MAG (Metal Active Gas) welding is a common arc welding process that uses solid or flux-cored wire to protect the arc and weld with an inert or active gas. Rolled welding wire is widely used in this process. Its main features and operating methods include:

Use inert or reactive gases: In MIG welding, inert gases (such as argon) are usually used to protect the welding process to prevent oxidation; in MAG welding, reactive gases (such as carbon dioxide or mixed gases) are used to improve arc stability and Welding efficiency.

Applicable welding wire types: Both solid welding wire and flux-cored wire can be used for MIG/MAG welding. Solid wire is often used for precision welding, while flux-cored wire is more effective when higher welding efficiency is required or when there is no gas shielding.

Operation method: MIG/MAG welding uses continuous wire feeding. The welder can use manual or semi-automatic equipment, which is suitable for mass production and welding of complex geometric structures.

(2) TIG welding

TIG (Tungsten Inert Gas) welding is a high-precision arc welding process that uses tungsten electrodes and inert gas protection. Rolled welding wire is mainly used as filler material in TIG welding. Its process characteristics include:

Inert gas protection: TIG welding usually uses inert gases such as argon or helium to protect the arc to ensure the purity of the weld and the welding quality.

Manual filler wire: In TIG welding, the welder usually manually adds rolled wire as filler material to supplement the weld. The operation mode is relatively slow, but the welding quality is high and suitable for high-precision welding.

Applicable wire type: Solid wire is commonly used in TIG welding, especially for welding stainless steel, aluminum and titanium alloys. It is suitable for welding scenarios that require precise control, such as aerospace and high-precision manufacturing.

(3) Submerged arc welding

Submerged arc welding is a high-efficiency welding process that uses a large amount of flux to cover the welding area and heat the wire and workpiece through the arc. Rolled welding wire is mainly used as electrode and filling material in submerged arc welding. The process characteristics include:

Flux coverage: In submerged arc welding, the welding area is completely covered by flux, and the arc generated during the welding process is shielded by the flux, reducing spatter and gas interference.

Continuous wire feeding: Submerged arc welding adopts mechanized continuous wire feeding, which is suitable for large structures and thick plate welding. The stability and high precision of Rolled welding wire help ensure welding quality.

Applicable wire types: Flux-cored wire and solid wire are commonly used in submerged arc welding, especially in large steel structures and shipbuilding industries.

5. Precautions when using Rolled welding wire

Rolled welding wire provides reliable and efficient performance during the welding process, but there are some key things to note during its use to ensure welding quality and operational safety. The following are the precautions for using Rolled welding wire:

(1) Welding preparation

① Check the condition of the welding wire: Before using the Rolled welding wire, check whether there is rust, dirt or other contaminants on the surface of the welding wire. Contaminated wire can cause welding defects.

② Select the appropriate welding wire: Make sure to choose the welding wire suitable for the welding task, including wire material, diameter and welding process. For example, carbon steel welding wire is suitable for welding carbon steel, while stainless steel welding wire is suitable for welding stainless steel.

③ Ensure the normal operation of the equipment: Before welding, check the status of the welding equipment to ensure the normal operation of the welding machine, welding gun, wire feeder and other equipment to avoid malfunctions during the welding process.

(2) Welding process

①Gas protection: For MIG/MAG and TIG welding, make sure to use appropriate gas protection. Ensure a stable gas flow to avoid oxidation or welding defects during welding.

②Keep the welding environment clean: The welding area should be kept clean and free of grease, paint, oxide layer and other pollutants. These contaminants will affect the quality of welding and cause problems such as pores and cracks.

③Control welding parameters: Select appropriate current, voltage, welding speed and other parameters according to the specifications of the welding wire and the welding process. Improper parameter settings may result in welding defects or unstable welds.

(3) Safety precautions

① Wear appropriate protective equipment: High temperatures, sparks and ultraviolet radiation generated during welding may cause injury. Welders should wear protective equipment such as welding masks, welding gloves, and protective clothing.

②Ventilation and smoke exhaust: Smoke and harmful gases will be generated during the welding process. Ensure that the welding area is well ventilated to avoid the accumulation of harmful gases and use smoke extraction equipment when necessary.

③Prevent welding spatter: Rolled welding wire may produce spatter during the welding process. Appropriate measures should be taken to prevent splash injuries, including the use of protective barriers or splash control sprays.

(4) Post-weld treatment

① Check the quality of the weld: After welding, the quality of the weld should be checked to ensure that there are no cracks, pores or other defects. Non-destructive testing is performed when necessary to ensure the integrity of the weld.

②Clean the welding area: After welding is completed, clean the welding area to remove welding slag and spatter. Keeping your welding equipment and work area clean helps extend the life of your equipment.

③Prevent weld corrosion: After welding is completed, take appropriate anti-corrosion measures, especially when welding stainless steel and other easily corroded materials.

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