| |
|
This hardening
technique is especially suited for those precision
components which are highly sensitive to warping.
Nitrogen is used as the quenching
medium. By changing the quenching
pressure (up to 6 bar) and the direction of the cooling gas stream one can
accurately select the optimal hardening
process for each component. The electronic process
control system assures that the quality is reproducible. In
the course of vacuum-hardening
temperatures of up to 1300° Centigrade are reached; a
quenching with hot-bath effect
is possible.
|
|
In addition to
being comparatively warp-free, components that have been
hardened in a vacuum are distinguished by their bright
metallic surface since oxidation
cannot take place in a vacuum. This method is used
especially for precision
components such as die-casting tools, tools in the
plastics industry, rollers/pulleys, pilots, matrices, knives and other tools, as well as for
high-temperature resistant and dwell and acid-resistant
machine parts. 
Charging of the vacuum oven with typical precision
parts
|
Vacuum-hardening