STA-VBF furnaces are VBF Series models customized for brazing and designed specifically to ensure a high level of vacuum.User can select both heat-insulating layer materials (graphite or reflector) and heater materials (graphite or molybdenum).
Vacuum Brazing Furnace
STA-VBF furnaces are VBF Series models customized for brazing and designed specifically to ensure a high level of vacuum.User can select both heat-insulating layer materials (graphite or reflector) and heater materials (graphite or molybdenum).
Brazing is a joining process where two or more parts of similar or dissimilar materials (traditionally metals, but can be used with ceramics) are joined by melting and flowing a filler material into the gaps between the parts to be joined by capillary action. The braze filler metal or ceramic must have a lower melting point than the adjoining parts and by heating the joint to a temperature above the liquidus temperature of the filler, but below the solidus temperature of the parent materials, a strong joint can be achieved.
The popularity of the furnace brazing process stems from the clean atmosphere used during the brazing cycle, which mostly eliminates use of fluxes and also eliminates post-braze cleaning. Various types of furnace are used for brazing, mostly employing either a gaseous atmosphere or typical vacuum environment, created with a vacuum pump to achieve the desired vacuum level. The overall furnace construction is based on either batch type or continuous operation. Batch operation includes retort type furnaces used for hydrogen brazing and vacuum chambers for vacuum brazing.
Vacuum furnaces are widely used, and often companies will utilise them for the heat treatment process, using heat exchangers, as well as brazing. Furnaces today are based on a cold wall construction, with internal heating elements, usually carbon or molybdenum. The cold wall refers to the water-cooled double skin construction used to keep external temperatures down to room temperature (or less). Braze furnaces can be either horizontal or vertical and can be either top or bottom loading. High temperatures of up to 1300°C and vacuum levels < 1x10-5 mbar can be achieved.
Vacuum Brazing Furnace
STA-VBF furnaces are VBF Series models customized for brazing and designed specifically to ensure a high level of vacuum.User can select both heat-insulating layer materials (graphite or reflector) and heater materials (graphite or molybdenum).
Brazing is a joining process where two or more parts of similar or dissimilar materials (traditionally metals, but can be used with ceramics) are joined by melting and flowing a filler material into the gaps between the parts to be joined by capillary action. The braze filler metal or ceramic must have a lower melting point than the adjoining parts and by heating the joint to a temperature above the liquidus temperature of the filler, but below the solidus temperature of the parent materials, a strong joint can be achieved.
The popularity of the furnace brazing process stems from the clean atmosphere used during the brazing cycle, which mostly eliminates use of fluxes and also eliminates post-braze cleaning. Various types of furnace are used for brazing, mostly employing either a gaseous atmosphere or typical vacuum environment, created with a vacuum pump to achieve the desired vacuum level. The overall furnace construction is based on either batch type or continuous operation. Batch operation includes retort type furnaces used for hydrogen brazing and vacuum chambers for vacuum brazing.
Vacuum furnaces are widely used, and often companies will utilise them for the heat treatment process, using heat exchangers, as well as brazing. Furnaces today are based on a cold wall construction, with internal heating elements, usually carbon or molybdenum. The cold wall refers to the water-cooled double skin construction used to keep external temperatures down to room temperature (or less). Braze furnaces can be either horizontal or vertical and can be either top or bottom loading. High temperatures of up to 1300°C and vacuum levels < 1x10-5 mbar can be achieved.
