Both nickel-chromium wire and iron-chromium-aluminum wire can be welded. However, the poor quality of the weld will affect the thermal stability of the welded part and the service life of the component. It will also cause brittleness to the iron-chromium-alloy alloy and affect the installation.
Iron-chromium-aluminum can only be welded with iron-chromium-aluminum electrode; if it is lower than 950 degrees, nickel-chromium electrode can also be used. When it is higher than 950 degrees, the chemical components will spread to each other, which greatly reduces heat resistance. Nichrome electrode The heat resistance is inferior to that of iron-chromium-aluminum electrothermal alloy.
Iron-chromium-aluminum alloys have poor weldability, and arc welding is generally required for quality requirements during welding, and high inert gas shielded welding such as argon arc welding is required. Alloy welding requires fast cooling by rapid welding to avoid grain growth and brittleness during welding.
The terminal has a rod shape and a strip shape, and the welding of the rod and the wire element is generally performed by drilling, milling and lap welding.