Lindberg/MPH, Riverside, Mich., has shipped a pit furnace to a leading manufacturer of mechanical components for steam treating tool steels. Steam treating produces an oxide film on the surface of the part, which improves wear resistance and corrosion resistance, and provides a uniform blue-black finish.
The heat treating furnace has a maximum temperature rating of 1250°F. The work chamber has diameter of 39 inches with a depth of 36 inches and a total load capacity of 3700 pounds. Vacuum-formed ceramic fiber modules have low heat storage and allow for fast heat-up rates. The pit furnace utilizes a high limit controller to protect from over-temperature conditions, and an actuator for atmosphere flow control.
This furnace utilizes nickel-chromium heating elements on the interior of an alloy retort to efficiently heat treat parts in a steam atmosphere. A thermocartridge recirculating fan and solid wall baffle provide uniform atmosphere and heat distribution.
This new Lindberg/MPH design features a maintenance-friendly fan and motor assembly, which allows for reliable and easy maintenance when needed, compared to the old Leeds and Northrup furnace design.
