The electrode welding core and drug skin of two parts. The electrode is outside the core of metal welding, coating (drug skin) uniform pressure applied to the welding core carefully. Different types of electrode welding core. Ie, Welding Electrode core metal core, in order to ensure the quality and performance of the weld, butt the content of metal elements in the core there are stringent regulations, especially the content of harmful impurities (such as sulfur, phosphorus, etc.), there should be strict restrictions, better than the parent metal. Welding core composition directly affect the composition and performance of the weld metal, so the harmful elements in the welding core as little as possible.
Welding of carbon steel and low alloy steel welding core, generally use low-carbon steel core as welding, manganese, silicon, chromium, nickel, and fill up the ingredients (see wire national standard GB1300-77). The one hand, low-carbon and low carbon content steel wire plastic, easier to wire drawing, on the other hand can reduce the reducing gas CO concentration, reduce spatter or porosity can be increased weld metal solidification temperature, beneficial to the overhead position welding. Adding other alloying elements in order to ensure the comprehensive mechanical properties of the weld, welding performance and to remove impurities, but also have a certain effect.
Other high-alloy steel, aluminum, copper, iron and other metal materials, the composition of the solder core addition to asking the weld metal are similar, the same should also control the content of impurities, according to process requirements often by adding certain alloying elements.
The electrode is coated with a drug skin for SMAW Copper Electrodes, which is a medicated skin and welding core composed of two parts. Electrode front-end drug skin around the 45 ° chamfer, in order to facilitate arc. Some bare welding core in the tail, about the electrode length of 1/16, to facilitate the welding clamp hold and conductivity. Electrode diameter Chung actually refers to the solder core diameter) is usually 2,2. 5,3. 2 or 3, 4, 5 or 6mm several specifications, it is common 3. 2, 4, 5 its length "L" is generally between 250 ^ -450 mm.
The welding work is a special job, the job qualifications of the workers have a rigorous training and assessment, forensics system. Forensics replacement trained to master certain skills, but there are still a lot of welders in the welding work safety consciousness, often in violation of the unsafe behavior of the "safe operation". Most welders Welding Electrodesprofessional and technical knowledge and safety of Cast Iron Electrode, many hidden dangers of welding job site accidents, such as welding machines Shell grounding or unreliable grounding terminal exposed to the required insulation, welding conductor exposed to lead connector do not follow the insulated handle, solder the lead soaked in water. Thus, to eliminate the causes of accidents of the welding work site is to be acquired by each welder skills. During operation to ensure not only their own personal safety, but also to ensure the personal safety of others, the welder must do the following precautions when welding work