prodSingleMainImgPlchldr Gas Nitriding Furnace ferritic nitrocarburizing processes, high alloy retort uses nitrogen, hydrogen, ammonia, hydrocarbon

Gas Nitriding Furnaces

Gas Nitriding Furnace ferritic nitrocarburizing processes, high alloy retort uses nitrogen, hydrogen, ammonia, hydrocarbon
Gas Nitriding Furnace high alloy retort uses nitrogen, hydrogen, ammonia, hydrocarbon atmosphere, bottom loading furnace
Gas Nitriding Furnace high alloy retort uses nitrogen, hydrogen, ammonia, hydrocarbon atmosphere, bottom loading furnace

When you look to purchase anything in life, you always feel more comfortable when you go to the experts. Surface Combustion has more than 100 years of experience with thermal systems. We offer equipment for classic gas nitriding and for ferritic nitrocarburizing (FNC) processes.

Gas Nitriding Furnaces - Product Description

Surface® Combustion’s classic gas nitriding equipment starts with a high alloy retort. This high alloy retort contains the ammonia, nitrogen, hydrogen and hydrocarbon atmosphere required for the nitriding process. This retort is traditionally vertically oriented and the furnace loading style is in the configuration of a bell or a pit style. The retort contains a loading hearth on the bottom or a loading ring for pieces that may be hung from the top.  The retort is installed in an electrically heated insulated chamber with a double sealed base or lid. For the pit style, the lid is hydraulically lifted and manually rotated. The double seal consists of a thermal rope seal and a rubberized inflatable gas tight seal.  Nitrogen, hydrogen, ammonia, methane, carbon dioxide and carbon monoxide are metered into the retort as required through precise mass flow controllers. Exiting gas is flared through an incinerator. The control of the process gas is tightly controlled in conjunction with the work to maintain a precise Kn factor (a nitriding potential).

Ferritic nitrocarburizing (FNC) can be performed in the same chamber also with different temperatures and different gas mixes.

Typical load sizes are from 36” to 60” diameter by 90” tall.

Insulations used in the hot zone are fiber. Heating elements are traditionally rod overbend style that are electrically isolated from the steel casing. The annulus between the hot zone and the outer surface of the retort may be purged with a constant flow air.

Cooling of the load from temperature consists of increasing the air flow as well as recirculating the internal atmosphere of nitrogen through a water cooled heat exchanger.

As an alternative furnace style for ferritic nitrocarburizing, a lift cover, carbottom, or  Allcase® furnace can perform to the same exacting specifications.

Internal diameters between 24″ and 96″

Loading height between 36″ and 144″

Loading weight up to 10,000 pounds

Custom size and weights available upon request

Electrically heated furnace using metallic rod type elements

Maximum operating temperatures up to 1250°F

Temperature uniformity of +/ 10°F

Top or bottom load supports available

Hydraulic cover lift and rotate systems available

External cooling systems available to reduce cycle time

Pollution control systems including incinerators or bubbler tanks

Manual or automatic controls meeting the requirements of AMS-2750 and AMS-2759/9 are available as requested

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Automotive

Commercial Heat Treating

Off Road/Mining/Excavation

Oil & Gas

Plastic/Injection Molding

Sporting Goods

Stamping

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Cast Iron

Dies

Extrusion Screws

Gears

Gun Barrels

Nozzles

Saw Blades

Stainless Steels

Steel

Valve Bodies

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Atmosphere Generator

Ammonia Dissociators (AX)

Gas Generators

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There are furnaces, and then there are Surface® furnaces

CONTACT US TODAY, and let us show you the Value of Surface™


Ready to Get Started?

Please call us when you are ready to do discuss a new furnace, maintain, upgrade or replace your furnace or any part of your furnace. At Surface, we look forward to helping you with any thermal processing needs.

Call Surface with the following pieces of information ready to initiate your furnace solution.

  • furnace cyclecycle
  • furnace operationoperation
  • hours per yearhours per year
  • available spaceavailable space
  • operating temperature rangeoperating temperature range
  • heat sourceheat source

Give Us A Call

(800) 537-8980

Need Support?

Please call us when you are ready to do discuss a new furnace, maintain, upgrade or replace your furnace or any part of your furnace. At Surface, we look forward to helping you with any thermal processing needs.

For Parts and Service have one or more of the following details regarding your furnace if possible:

  • Serial number
  • Drawing number
  • Photos of your furnace or parts for replacement
  • Spare parts list
  • Furnace rebuild history

Give Us A Call

(800) 537-8980