Selection Principles of Welding Electrodes
Welding electrode is one of the main welding materials. It is made of a coating on the surface of the core wire, and it is the component of electric arc welding that connects the two welding objects. The selection of welding electrodes is generally selected according to the mechanical properties of welds and the chemical composition of materials.
The mechanical properties of welds depend mainly on the tensile strength, impact strength and other mechanical properties of the deposited metal. The tensile strength and impact strength of the deposited metal are related to the chemical composition and welding temperature of the welding electrode. First, it is necessary to know that the welding temperature is mainly related to the welding current. The higher the welding current, the higher the welding temperature. This can be used to change the chemical composition of the deposited metal within a certain range, thereby varying the deposited metal strength. At the same time, if other welding processes are combined with electric arc welding, such as heating, sandblasting and so on, the characteristics of welds can be further optimized.
The chemical composition of materials affects the properties of welds in different ways. The structure of the welded joint is closely related to the melting point of the material. If the material has a low melting point, it is easier to weld. The strength of the deposited metal is closely related to the chemical makeup of the welding electrode. Different welding electrodes can have different additions and chemical components, so it is very important to select the appropriate welding electrode according to the chemical makeup of the material.
In summary, the selection of welding electrodes must meet the mechanical properties of welds and take into account the chemical composition of materials. Through the appropriate combination of welding current, welding process and welding electrode, it is possible to obtain welds with satisfactory mechanical properties.
The selection of welding electrodes should be based on the premise of meeting the requirements of welding process. The selection of welding electrodes should consider two aspects, one is to meet the out of the deposited metal a certain mechanical properties, two is to select the best welding current and welding process. These two aspects should be taken into consideration when selecting the welding electrode.
Welding electrode selection is an important part of the welding process. The correct selection of welding electrodes is an important basis for successfully achieving satisfactory welding results. The selection of welding electrodes must take into account the mechanical properties of welds, the chemical composition of materials, the welding current and the welding process. Only by correctly selecting the welding electrode can the welding work be done well.
