Legor Group (more)

Brazing Division

The Brazing Division is a result of the consolidated experience acquired by Legor Group in the metallurgy of precious and common metals for the gold and silver sector and the significant investments made in its in-house atomization and continuous casting processes.

THE PRODUCTION

The wide industrial brazing range offered by Legor Group guarantees a high quality standard, production batch repeatability and maximum competitiveness in terms of price.
The production cycle begins with programming which analyses the requirements identified by planning in order to draw up a production plan and organize purchase of the raw materials according to precise technical specifications. The Purchasing Department is responsible for the procurement of quality raw materials and semi-finished products sourced mainly on the Italian and European market.
Legor Group considers its suppliers strategic partners for growth and competitiveness, it establishes relations with them that go beyond the simple business sphere and is committed to maintaining lasting relationships with those who meet its supply requirements in terms of quality, price and reliability, also sharing the company’s principles and values.
Thanks to its Quality Management System, Legor Group constantly guarantees an excellent quality standard able to manage the entire production chain via integrated IT systems that record, monitor and measure each product processing phase. All this allows real traceability of each individual process phase, thus ensuring optimal results for every product batch.

Safety and Health


Safety Guidelines


BRAZING AND SOLDERING

Brazing is a metal-joining process where materials, similar or dissimilar, are bonded together using a heating method and a filler metal without melting the base materials. During the brazing process the filler metal is heated above its melting point, wets the base materials and flows, by capillary action, between two or more close-fitting parts. The melted metal fills the gap and when cooled, joins the pieces together. A flux is generally used to enable the wetting of the base
materials by the filler metal.
The main difference between soldering and brazing lies in the temperature of the heating process: soldering occurs at temperatures less than 450°C (840°F), and brazing occurs at temperatures over 450°C (840°F). There are various methods that can be used to heat the filler metal such as hot plate, induction, torch and furnace.
 

BRAZING ALLOYS

The brazing alloys are usually made of silver and contain other elements such as copper, zinc and tin. The melting temperatures can be controlled, by modifying the composition of the alloy. The introduction of additional elements such as manganese and nickel can affect the wetting properties of the metal and the strength of the joint. Silver free versions of brazing alloys are also available as a less expensive version of the silver based ones. These alloys can be copper or copper/phosphorous-based, and used primarily to join metals like copper, bronze or brass. Gold or palladium based brazing alloys, are also available for special applications. These brazing alloys are suitable for those processes that require high corrosion resistance properties and for high temperature applications and are able to
ensure good mechanical properties for the joint.