Ald Vacuum Technologies Gmbh

Volker Heuer

Klaus Löser

Gunther Schmitt

Gerhard Welzig

Klaus Loeser

Robin Viel

Klaus Loser

Christof Ziegler

A process and apparatus for thermochemically hardening workpieces is provided incorporating the following steps, carried out in a variable sequence: one or more carburizing steps, each in a carbon-containing gas atmosphere at a pressure of less than 50 mbar, the workpieces being held at temperatures of 900 to 1050&#xb0; C.; if appropriate, one or more diffusion steps, each in a gas atmosphere at a pressure of less than 100 mbar; and one or more nitriding steps, each in a nitrogen-containing discharge plasma at a pressure of less than 50 mbar, the workpieces being held at temperatures of 800 to 1050&#xb0; C.

Process and apparatus for thermochemically hardening workpieces

The invention relates to a method and device for thermally treating workpieces, the device including a cooling chamber and two or more carburizing or heating chambers in which the workpieces are heated to a temperature of 950 to 1200&#xb0; C. by means of radiation, such as direct heat radiation from a heating device.

Method and device for hardening workpieces, and workpieces hardened according to the method

The invention relates to a method and device for thermally treating workpieces, the device including a cooling chamber and two or more carburizing chambers in which the work pieces are heated to a temperature of 950 to 1200&#xb0; C. by means of direct heat radiation from a heating device.

Method and device for hardening work pieces and workpieces hardened according to said method

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Frankfurt-am-Main, Germany

Volker Heuer