The welding core is the metal core of the electrode. In order to ensure the quality of the weld, there are strict regulations on the content of various metal elements in the weld core. In particular, there are strict restrictions on harmful impurities (such as sulfur and phosphorus), and the quality of the weld core metal should be better than that of the base metal. Arc welding cannot be carried out on a smooth rod without a coating. This is because the arc stability is very poor, splashing is very large, and the weld is not well formed. After long-term practice, it is gradually found that the performance of the electrode is greatly improved by coating the welding core with some mineral raw materials (i.e. electrode coating). (1) Ensure stable arc combustion, so that the welding process is normal. (2) Using the gas produced after the drug skin reaction, protect the arc and the molten pool, prevent the harmful gases in the air (such as nitrogen, oxygen, etc.) from invading the molten pool, such as these gases will cause cracks and pores in the welding material, so that the welding can not achieve the ideal effect. (3) After the drug skin is melted, slag is formed, which covers the weld surface to protect the weld metal, make the weld metal slowly cool, help the gas escape, prevent the generation of pores, and improve the structure and performance of the weld. (4) After melting, various metallurgical reactions will be carried out, such as deoxygenation, sulfur removal, phosphorus removal, etc., so as to improve weld quality and reduce alloying element burning loss.

3. The front and back twist barbed wire has a beautiful appearance

Summer is the breeding season of mosquitoes, at this time, not only should pay attention to pet food and drinking water clean, but also pay attention to cleaning the dog cage regularly, so as to avoid pet disease.

As we all know, the use of hexagonal net for protection can protect the natural environment while protecting the bridge, which can not only green the ecological environment, but also prevent soil erosion.

The optional height of this type of wire mesh is 1 meter, 1.2 meters, 1.5 meters, 1.8 meters, 2 meters. The latter three are the most commonly used, too low to achieve the fence protection effect. The mesh size is divided into 3 cm and 6 cm, and the vast majority of 6 cm is used.

4. Press the tape firmly against the surface to ensure full contact between the tape and the substrate.Smooth out any wrinkles, bubbles, or gaps to create a tight seal. In some cases, you might need to apply multiple layers of tape, particularly when sealing larger gaps or joints.