Glossary: joining line

A welding is defined as soldering when it is made using a process temperature that is below 450°C (840°F) and below the items’ melting temperature. This is typical of tin or lead-based solders.

A flame is used to heat the substrate and then to melt the welding material, offering reasonable control for skilled hand operations in terms of area of the welding spot, using a cost-effective method; for these reasons it is very well known in the jewerly sector. Wires, plates, pastes can be used.

The piece to be soldered is put in a static or belt furnace, in order to bring the welding material to melting point, so that it can wet pre-set parts of the jewel. It can be the best solution when in need of higher productivity and standardization. Soldered plates, pastes, powders can be used.

A laser source is used to bring the metal to melting point with excellent precision on the area to be worked on. This technology allows to use the same alloy of the substrate as welding material. Wires or plates of other feeding material can be used too. 

The working temperature indicated in the catalogue is the temperature at which the soldering alloy is able to flow through the seams to be soldered, without overheating the material.