We provide
technological specialized in tungsten-based welding electrodes to contribute toward improvement in productivity. Resistance welding is an extremely delicate process, and it is difficult to select which electrodes are best suited for the process, If your work piece made of materials other than copper or copper alloys, we recommend that you use copper electrodes, such as of chromium copper and alumina dispersion copper, and if the result unsatisfactory in terms of their lifetime and performance, Tungsten-based electrodes are recommended for resistance welding of copper wires, sheets, and so forth, including fusing
Required characteristics of the resistance welding electrode materials
1) Resistance to deformation under high temperatures
2) High heat and electrical conductivity
3) Low tendency to form alloys with the welded material or plating material
4) Resistance to oxidation in air
5) Low price.
Introduction to the recommended electrode materials
A. The work piece is made of stainless steel, soft steel or low-alloy steel sheets (except for galvanized materials) we recommend:
Ag-WC-based electrode materials and Ag-W-based electrode materials These are composite alloys of Ag which goes through little reaction with iron, chromium, nickel and so forth which are the main components of the welded material, and WC or W with high melting point and hardness. Specifically, the Ag-WC-based electrodes, with the lowest tendency for oxidation among all the tungsten-based electrodes, deliver excellent characteristics.
B. The work piece is made of copper or copper alloys:
Cu-W-based electrode materials, pure Mo, and pure Tungsten W
C. When the welded material is copper based, use of silver-based electrodes such as Ag-W and Ag-WC may result in welding between the electrode and the welded material through a eutectic reaction between silver and copper, which is not at all favorable. If the electrode itself needs to generate heat in processes such as heat caulking, pure Mo and pure W, which have relatively high specific resistance values and form solution with copper, are well suited
