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In glass processing, the stress on the tool is similar to that on a die casting
tool. Thermal loads, however, have a much greater influence on the service life
due to the changing temperatures of the glass compositions, which are extremely
high. These requirements can only be met by tool steels of the highest quality,
i.e. corrosion-resistant and heat-resistant steels.
The various processing methods, chemical composition of the glass and the
associated processing temperatures all require the use of specifically matched
hot-forming tool steels. The composition and production method of these steels
are designed taking into account critical parameters such as:
ability to be polished
dimensional stability when subjected to heat, and
resistance to thermal shock
Tool steels, which must have the required working properties, must also be easy
to machine, have a high degree of purity and exhibit uniform structural
properties. In order to achieve these properties, the steels must be refined by
means of the ESR (electroslag remelting) process.
We also stock some of these tool steels in half-round dimensions.