Welding Consumable
Filler metals are materials like wires, rods, or powders added during the joining process to optimize joint filling and alloying. They must be precisely matched to the base material.
Physico-Chemical Working Principle
Filler materials are used to add specific properties or compositions to the weld. They can contain chemical elements or metal alloys that react during welding and affect the joint's alloy.
Metallurgical Relevance & Risks During Welding
Choosing and applying filler materials is critical for weld quality. Using wrong fillers or too much of them can worsen mechanical properties, like lower toughness or higher crack susceptibility. An unsuitable filler can also disturb the melting process and cause porosity.
Workshop Practice & Instructions
When using filler materials, match them to the base metal. Always stick to the amounts given in the base and filler manufacturers' instructions. When picking the filler, consider the joint's needs, like required strength or corrosion resistance. Make sure the filler is fed into the pool correctly and evenly during welding.