Filler Metal
Filler materials are metals or alloys added during welding to achieve specific properties or solve problems, such as improving toughness, reducing porosity, or increasing corrosion resistance.
Physical-Chemical Mechanism of Action
Filler materials are added to the weld to change its chemical composition. They can bind oxygen, reduce porosity, or improve specific properties like toughness and corrosion resistance.
Metallurgical Relevance & Welding Risks
Choosing or applying the wrong filler material can lead to unwanted effects, such as increased stress buildup, coarser grain structure, or poor corrosion resistance. It's crucial to pick the right filler for the job and use it correctly.
Workshop Practice & Instructions
When using filler materials, follow these guidelines:
• Choose the right filler based on what the weld needs (toughness, corrosion resistance).
• Add the filler to the weld pool before the metal solidifies.
• Make sure the filler is evenly distributed and fully melted to get the desired effects.