We fabricate materials for cast products that are customised for the complex stress profiles of our customers’ products. Depending on the job specification, approximately 30 different DIN EN 1561 standard alloys can be supplied as well as plain varieties.
Cast iron with lamellar graphite has a microstructure consisting of a basic matrix in which the carbon is largely embedded in lamellar form. We are able to influence material properties systematically so as to produce materials that are optimally suited to their application. In this process, the matrix considerably affects basic strength, tensile strength, thermal resistance, and creep as well as wear resistance. In the production of brake discs, for example, the perlitic base can be modified using specific alloying techniques. This allows the thermal resistance to remain intact over the largest possible temperature range and time period, while also offering sufficient abrasion resistance.

In addition to providing adequate vibration damping, a particularly coarse lamellar form supplies excellent heat conductivity as well as thermal shock resistance. Illustration 1 shows the formation of the graphite lamellae as a typical microstructure. When etched (Fig. 2), the perlitic matrix becomes visible.

Our director of quality assurance-/materials technology would be happy to answer any questions you may have on this topic (e-mail: qualitaetswesen@mbusch.de).