L&L Special Furnace commissions high-temp box furnace for CMC parts
Multi-layer, high-temperature insulation, enables temperatures up to 1,700°C under partial atmospheric pressure for CMC parts production to be used in military and aerospace applications.
GHH series box furnace. Photo Credit: L&L Special Furnace Co. Inc.
L&L Special Furnace Co. Inc. (Aston, Pa., U.S.) has shipped and commissioned a large, high-temperature box furnace to a Midwestern U.S. plant starting production on ceramic matrix composite (CMC) parts that will be used in military and aerospace applications.
The L&L GHH3350 has an effective work zone of 32" wide x 30" high x 50" deep. The furnace is capable of reaching temperatures up to 1,700°C under partial atmospheric pressure. There is also a vacuum pump to help remove oxygen prior to beginning the thermal cycle.
The front-loading box furnace is insulated with multi-layer, high-temperature insulation, according to L&L. The floor is reinforced and includes a composite hearth capable of supporting load weights up to 500 pounds.
The GHH3350 is heated with molybdenum disilicide elements located on the side walls and back. It is controlled by a Eurotherm program control with over-temperature protection and includes a multi-pen chart recorder with 36 inputs to record various temperatures, flow rates and pressures.
The case is sealed for use with inert atmosphere. It includes an automated flow panel, type B thermocouples and a stack light audible visual annunciator system. The company says the furnace has an afterburner or scrubber to remove any contaminates prior to evacuation from the furnace.
All L&L furnaces can be configured with various options and be specifically tailored to meet a customer’s thermal needs. L&L also offers furnaces equipped with pyrometry packages to meet ASM2750.
Options include a variety of control and recorder configurations. A three-day, all-inclusive startup service is included with each system within the continental U.S. and Canada. International startup and training service is available by factory quote.
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