1. weldment preheating, copper welding rod drying To improve the welding quality, the weldments are preheated to 300-350 degrees before welding and the electrodes are baked for 1 hours at 150-200 degrees. 2. way method The copper welding strip can be welded by linear strip method, the faster the better, the better the metal oxidation.…
If manual arc welding is used, the first thing is to distinguish between hot metal and leather. Observe molten pool: the molten liquid is molten iron, and floating on it is the skin of medicine. Attention should be paid to the welding. The skin should not be allowed to exceed the molten iron, otherwise it…
The electrode coating is made up of various minerals, iron alloy organic compounds and chemical products (such as sodium silicate). The composition of the electrode coating is quite complex. There are seven or eight kinds of composition in the electrode coating. The composition of the electrode coating is very complicated. According to different uses, the…
In the welding process, the drug skin plays a complex metallurgical reaction and physical and chemical changes. It basically overcomes the problem of the light welding rod appearing in the welding. So it is also one of the main factors to determine the quality of the weld metal. 1) mechanical protection (1) gas protection During…
1.Steady arc. Ensuring the stable combustion of welding arc and making the welding process stable is the necessary condition to ensure the welding quality. 2.Protection of arc and molten pool. Nitrogen, oxygen and other gases in the air are harmful to the metallurgical reaction of the welding pool. The gas produced by melting the electrode…
During the storage process of welding wire products, they are basically also methodical. When storing, they must be guaranteed that they are all stored in some dry environment, and they must avoid some moisture. Or where there is more liquid, the welding wire can not be stored with some other acidic liquid, or alkaline liquid. The welding…
The electrode coating is made up of various minerals, iron alloy organic compounds and chemical products (such as sodium silicate). The composition of the electrode coating is quite complex. There are seven or eight kinds of composition in the electrode coating. The composition of the electrode coating is very complicated. According to different uses, the…
Flux-cored wire, also called powder-cored wire, tubular wire, it is divided into two categories of gas protection and no gas protection. The surface of flux-cored wire is made of low carbon steel or low alloy steel. The manufacturing method is that the steel strip is first rolled into a U-shaped section shape, then the welding…
Flux: a chemical substance that can help and facilitate welding process in the welding process, and has protective effect and prevents oxidation reaction. The flux can be divided into solid, liquid and gas. There are mainly “auxiliary heat conduction”, “removing oxide”, “reducing the surface tension of the welded material”, “removing the surface oil of the…
