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November 08, 2016

Lindberg/MPH Ships Electrically Heated Pit Furnace to a Technology Manufacturer

Lindberg/MPH announced the shipment of an electrically heated, gas nitriding, pit furnace with an ammonia dissociator system for heat treating parts. This heat treat furnace system performs a two-stage nitriding process to achieve high surface hardness of the steel parts. The ammonia dissociator provides dissociated ammonia during the nitriding cycle second stage. All of the equipment needed to perform this two-stage nitriding process has been provided with the system and is backed by the installation and start-up support of knowledgeable Lindberg/MPH service personnel.

The pit furnace has a maximum temperature rating of 1250°F and work chamber dimensions of 28" diameter x 36" depth. A state of the art operator interface controls process parameters and is used to observe/archive historical data. The system will monitor and control the furnace temperature, fan speed, atmosphere flow, and cooling throughout the entire cycle. Accelerated cooling cuts down on overall cycle time. The advanced control system solves the problems of controlling furnace atmospheres, storing batch data, tracking alarm trending, and complying with AMS2750E specifications.

“The advanced control system supplied on this pit furnace provided our customer with the ability to efficiently program and record their entire heat treating process. The state of the art PLC system installed on this system was the ideal choice to control the two stage nitriding process and meet AMS2750E specifications.” Jason Dobberstein, Inside Sales Manager

Unique features of this Lindberg/MPH pit furnace include:

  • Low iron brick insulation to prevent reactivity with furnace atmosphere

  • Heater coils designed with low surface watt density for extended service life

  • Thermocartridge fan for increased heat and atmosphere recirculation

  • Nitriding gas flow control system with full automatic recipe control for each stage of the two-stage nitriding process

  • Electric process atmosphere flowmeters

  • Paperless chart recorder

  • Oxygen and hydrogen sensors

  • Accelerated cooling

  • AMS2750E Factory Uniformity Testing

  • Ammonia dissociator

  • Instrumentation Commissioning

  • Furnace Commissioning

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