Guangdong stainless steel casting high-frequency welding castings use the skin effect and proximity effect of alternating current. After the steel is rolled and formed, a circular tube blank with separated sections is formed, and one or a group of impedance devices are rotated near the center of the induction coil. (Magnetic rod), the impedance device and the tube blank opening form an electromagnetic induction loop. Under the action of the skin effect and the proximity effect, the edge of the tube blank opening produces a strong and concentrated heat effect, which quickly heats the edge of the weld seam to the point required for welding The temperature is squeezed by the pressure roller, and the molten metal is squeezed by the pressure roller to form a firm butt weld after cooling.
Guangdong stainless steel casting high-frequency welding is based on the principle of electromagnetic induction and the skin effect, adjacency effect and eddy current heating effect of the AC charge in the conductor. The steel at the edge of the weld is locally heated to a molten state, and the butt weld is squeezed by a roller to achieve it. Intercrystalline bonding, so as to achieve weld welding. High-frequency welding is an induction (or crimping) welding method. It does not require welding seam filling, welding spatter, narrow welding heat-affected zone, beautiful welding shape, and good welding mechanical properties. Therefore, it is obtained in the production of steel pipes. Widely used, the process required to complete precision casting products is very complicated. First, mold making → melting (temperature 1600°C) → pouring → vibration shell + cutting (cutting the gate) → rough grinding (grinding off the gate) →Pickling (purpose: to remove cast oxide scale pickling solution: nitric acid 50%, hydrogen fluoride).