Täytejohtolanka

Täytejohtolanka is a Finnish term that translates to "filler wire" or "brazing filler material" in English. It is a consumable metal alloy used in joining processes, primarily brazing and soldering, to create a strong and leak-proof bond between two or more base metals.

The composition of täytejohtolanka varies widely depending on the specific metals being joined and the required properties of the joint, such as strength, corrosion resistance, and operating temperature. Common elements found in filler wires include copper, silver, tin, zinc, nickel, and phosphorus. These elements are combined in precise ratios to achieve desired melting points and flow characteristics.

Täytejohtolanka is typically supplied in the form of thin rods or wires, often coated with a flux. The flux plays a crucial role in the joining process by cleaning the surfaces of the base metals, preventing oxidation during heating, and promoting the wetting and flow of the molten filler material.

When heat is applied to the joint area, the täytejohtolanka melts and is drawn into the gap between the base metals by capillary action. Upon cooling, the filler material solidifies, creating a metallurgical bond that is typically stronger than the base metals themselves. Täytejohtolanka is widely used in various industries, including electronics, plumbing, automotive, aerospace, and jewelry making, for its ability to create durable and reliable connections.