Composition for machinable vitroceramics

摘要

The invention relates to vitroceramics containing fluorinated mica which crystallise in situ during shaping at a high crystallisation rate during cooling from the liquid melt state, can be moulded to give semifinished products by various moulding processes, such as casting or centrifugal casting, and are distinguished by very good machinability during the various fabrication processes using HSS or hard-metal tools, for example by turning, milling, drilling or planing. The vitroceramics according to the invention can be employed as substitute materials for, for example, various Fe and nonferrous metals, plastics or ceramics, but should also be considered as materials for novel areas of application in virtually all areas of industry which process or employ materials.