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Freeze materials in a short time by liquid nitrogen
(-196°C)'s vaporization latent heat(48kal/kg)
which is beyond the limit of freezing machine and make programs
controlling optional freezing temp and time. |
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Cooling room and gas agitation system
Liquid
nitrogen supplying system
Automatic
temp control and recording system.
Safety
device. |
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Improvement of material's hardness and wear
resistance by changing retained auatenite
into
martensite
Secure
of size' safety by season distorsion
prevention
Strengthen
hardness by resolving nasty retained
auatenite of carburizing surface.
Improve
the rest of mechanical quality. |
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Sub-zero treatment for season distorsion prevention
of metallic measurement gage
Sub-zero
treatment for wear resistance of diese
punch and so on.
Remove
retained auatenite of big sized gear and
roller's carburizing surface. |
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Standard: make any standards by orders.
Using
temp:-150°C type, -196°C type
Control
recording: program control and
recording system
Adiabatic
method: urethan foam insulation.
Control
method: control by solnoid valve.
Safety
device: circuit breaker, manometer, pressure
block switch, safety valve. |
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