High-temperature alloy welding rods are important materials specifically designed for welding nickel-, cobalt-, and iron-based superalloys. They exhibit excellent high-temperature oxidation resistance, creep-rupture strength, and thermal stability, making them widely used in industries requiring extreme temperatures and corrosive environments, such as aerospace, energy and power generation, and chemical equipment. Depending on the welding process and base material, welding rods are highly tailored in composition, coating, and deposited metal properties, making them a key welding material for ensuring the safe operation of high-temperature alloy structures.
Main categories of high temperature alloy welding rods
| Classification | Classification Type | illustrate |
|---|---|---|
| Matrix elements | Nickel-based, cobalt-based, iron-based | Classification by main alloying elements determines its heat resistance and corrosion resistance |
| Coating type | Titanium calcium type, low hydrogen type, high temperature alkaline type | Affects welding arc stability and slag protection |
| Use process | Manual arc welding（SMAW） | The welding rod is a metal core with a flux core, which is heated by the arc to melt and form the weld. |