LBI develops the alloys according to your needs in order to achieve the mechanical and physical propreties specific to a particular application.
In addition to alloys specified by the most common material standards (EN, DIN, ASTM, BS, WNr., NF, SEW…), LBI also casts many different alloys further to its customers’special requests (for example particular chemical analysis, restriction, special targets for mechanical properties…). This is all possible thanks to the advanced knowledge of its foundry workers and to its adaptive equipment.
Another advantage of its particular competences in alloying is the possibility to reuse the shavings of metal (swarf) left from the machining process. This recovery of the shavings enables a very interesting reduction in production costs.
From the beginning of the production process, the furnace charges are perfectly monitored by computerisation, with each following step thoroughly controlled.
Each liquid melt is analysed through automatic spectrometry.
Each consituent of the chemical analysis is carefully targeted in order to achieve higher mechanical and physical properties than those requested in the standards.
A final sample is taken from the ladle, just before the centrifugal casting (or spun casting) operation takes place, and is analysed and kept for a minimum period of one year.
Designed to limit the time of melting and to obtain optimal mixing in the liquid baths, the 24 melting furnaces at LBI (from 300 kgs up to 14 tons each) enable us to achieve the metallurgical quality and homogeneity of the alloys produced.
The stainless steels produced in induction furnaces can be operated under very severe conditions.
The combination “induction melting and centrifugal casting (or spun casting) process” leads especially, as far as austenoferritic steels are concerned, to very high quality levels, similar to those obtained on pieces cast under vacuum or with AOD converter.
The centrifugal casting process (or spun casting) is mainly suitable for cylindrical or hollow pieces (rings, tubes etc…). Conical shapes, several different diameters or flange(s) can be obtained on the “as cast” outer profile.
As we do not use cores, the inside diameter is cylindrical and is achieved by the quantity of liquid metal poured into the tooling.
Our extensive range of toolings (more than 1500 dies) enables us to reach the ideal cast sizes and shapes, consequently to propose the most economical solutions.