Submerged Arc Welding Wire： Technical Characteristics And Application Prospects

Submerged arc welding, as an efficient and high-quality welding method, occupies a pivotal position in the heavy industry field. As its core component, the Submerged Arc Welding Wire directly affects the mechanical properties, chemical composition, and process stability of the welded joint. This article will analyze the technical characteristics of Submerged Arc Welding Wire and look forward to its future application prospects.

EA2 saw wire is used in conjunction with flux to generate an electric arc between the end of the wire and the base metal through current. The arc is covered by granular flux, forming a molten pool. Compared with traditional manual welding or gas shielded welding, the significant feature of submerged arc welding is that the arc is covered by flux, thereby avoiding atmospheric pollution and improving the stability of the welding process. As the conductor of arc combustion and the source of deposited metal, the quality of welding wire is directly related to the welding quality.

The technical characteristics of Submerged Arc Welding Wire are mainly reflected in the following aspects

Firstly, the precision of ingredient control. In order to meet the welding requirements of different materials, the composition design of saw welding wire needs to be strictly controlled. By adjusting the proportion of alloying elements, welded joints with specific mechanical properties (such as tensile strength, yield strength, impact toughness) and corrosion resistance can be obtained. For example, when welding low-alloy high-strength steel, it is necessary to add appropriate amounts of Mn, Si, Cr, Mo and other elements to improve the strength and toughness of the welded joint.

Secondly, surface smoothness and dimensional accuracy. The surface of the sub arc wire must be smooth and free of impurities to ensure stable current transmission and purity of the deposited metal. In addition, the diameter accuracy of the welding wire directly affects the welding speed and deposition efficiency. Excessive size deviation may lead to unstable arc and inconsistent penetration depth, ultimately affecting welding quality.

Again, optimization of process performance. Good process performance is the key to achieving efficient welding of Submerged Arc Welding Wire. This includes excellent wire feeding performance, stable arc combustion, and good slag removal. By optimizing the surface treatment process and lubricant of the welding wire, the wire feeding performance can be improved and the phenomenon of wire jamming can be reduced. Stable arc combustion can ensure the uniformity of the molten pool and reduce the occurrence of welding defects. Good slag removal can reduce cleaning costs and improve production efficiency.

Looking ahead to the future, with the continuous development of the manufacturing industry, the demand for high-performance welding technology is increasing, and the application prospects of Submerged Arc Welding Wire will be even broader

On the one hand, special alloy welding wires will be more widely used. With the continuous emergence of new materials, the demand for special alloy welding wires will also increase day by day. For example, in special environments such as high temperature resistance and corrosion resistance, it is necessary to develop alloy welding wires with specific compositions and properties to meet demanding application requirements.

On the other hand, automation and intelligence will be the development trend. Combining intelligent manufacturing technology can achieve real-time monitoring and control of the welding process, optimize welding parameters, and improve welding quality and efficiency. For example, by detecting welding current, voltage, temperature and other parameters through sensors, and automatically adjusting wire feeding speed and welding speed based on feedback information, an intelligent welding process can be achieved.

In summary, as the core material of submerged arc welding, the technical characteristics of subarc wire directly affect the welding quality and efficiency. With the continuous advancement of technology and the increasing demand for applications, Submerged Arc Welding Wire will continue to innovate in composition control, surface treatment, and process optimization, and combine automation and intelligent technology to make greater contributions to the development of the manufacturing industry.

Submerged Arc Welding Wire  FAQs

What are the main types of Submerged Arc Welding Wire?

Submerged Arc Welding Wire is mainly divided into carbon steel welding wire (such as H08A, H10Mn2), low-alloy steel welding wire (such as H08MnA, H08MnMoA), and stainless steel welding wire (such as H0Cr21Ni10). Welding wire needs to be used in conjunction with specific fluxes. Common fluxes include melting type (such as HJ431) and sintering type (such as SJ101).

How to choose the appropriate Submerged Arc Welding Wire?

The selection criteria include:

Base material composition: matching or slightly higher than the strength of the base material

Flux type: Acidic flux with ordinary welding wire, alkaline flux with low hydrogen welding wire

Process requirements: For high-speed welding, it is recommended to use small-diameter welding wire (2.03.0mm)

Mechanical properties: Special attention to low-temperature impact toughness requirements

What are the key points to pay attention to when using Submerged Arc Welding Wire?

Key precautions:

1) Welding wire and flux must be strictly matched

2) Before welding, the solder flux needs to be dried (usually 300, 400 ℃ × 2h)

3) Control the dry elongation of welding wire (generally 2040mm)

4) Maintain stable welding speed and current voltage

5) Thoroughly clean the slag during multi-layer welding

How does the diameter of the Submerged Arc Welding Wire affect the welding effect?

The influence of diameter is manifested as:

Fine welding wire (≤ 3mm): deep penetration, suitable for high-speed welding of thin plates

Coarse welding wire (≥ 4mm): high deposition efficiency, suitable for thick plate welding

Medium diameter (34mm): Best versatility

The selection of diameter also needs to consider the current size (300400A per millimeter diameter)

5. Common defects of Submerged Arc Welding Wire and solutions related to welding wire?

6.  

Typical problem solutions:

Pore: Check the drying condition of the flux and replace the damp welding wire

Crack: Use low hydrogen welding wire and flux combination instead

Slag inclusion: Adjust the inclination angle of the welding wire (515 ° is suitable for backward inclination)

Bite: Reduce current or switch to smaller diameter welding wire

Insufficient melting depth: increase current or decrease wire diameter