A common feature of various pressure welding methods is the application of pressure during the welding process without the addition of filler material. Most pressure welding methods such as diffusion welding, high frequency welding, cold pressure welding, etc. have no melting process, and thus there is no problem of burning of the beneficial alloy elements such as welding, and the intrusion of harmful elements into the weld, thereby simplifying the welding process, and also Improved welding safety and hygiene conditions. At the same time, the heat affected zone is small because the heating temperature is lower than the fusion welding and the heating time is short. Many materials that are difficult to weld by fusion welding can often be pressure welded into high-quality joints with the same strength as the base metal.