Kohnle / Kohne industrial heat treatment furnaces

Continuous industrial heat treatment furnaces from Kohnle / Kohne for hardening, carburizing, and annealing under controlled atmospheres. Engineered thermal processing lines and wear parts.

Kohnle / Kohne BLH mesh belt retort furnaces

Continuous retort furnaces from Kohnle / Kohne BLH series incorporate a sealed heat-resistant nickel-chromium alloy muffle. The systems perform gas carburizing, carbonitriding, and hardening of precision fasteners under controlled protective atmospheres from 550 to 950 °C.

Sealed alloy muffle prevents oxidation and decarbonization during thermal runs
Rapid gas atmosphere exchange with precise carbon potential control via lambda probes
Direct connection to automatic quench tanks configured for oil, polymer, and water
Throughput capacity rating from 6 to 500 kg/h with automated vibratory feed units

Kohnle / Kohne RMH roller hearth heat treatment furnaces

Industrial roller hearth furnaces from Kohnle / Kohne RMH series convey components across wear-resistant ceramic SiSiC rollers without mesh belts. The modular layout enables rapid transfer of elongated parts at process temperatures up to 950 °C under protective atmospheres.

Workpiece conveyance via ceramic silicon carbide rollers engineered for high thermal loads
Even heating using high-efficiency recuperative gas burners and electric elements
Powerful hot gas circulation fans providing homogeneous furnace atmosphere distribution
Throughput capacity from 50 to 500 kg/h with full integration into continuous lines

Kohnle / Kohne FH continuous mesh belt conveyor furnaces

Continuous conveyor furnaces from Kohnle / Kohne FH and FH-K series are engineered for high-volume thermal processing. The wire mesh belt travels over roller bearing supports, reducing mechanical tension and extending operating belt life at furnace temperatures up to 950 °C.

Roller bearing belt supports limit friction and prolong wire mesh durability inside heating zones
Thermal energy recuperation at entry vestibule reduces fuel consumption and operating costs
Water cup sealing on discharge chutes preserves protective atmosphere integrity
Throughput rating from 150 to 1000 kg/h for continuous carburizing and tempering tasks

Kohnle / Kohne FH-I heavy link belt conveyor furnaces

Heavy-duty conveyor furnaces from Kohnle / Kohne FH-I series feature a continuous track built from interlocking heat-resistant poured alloy links. The robust structure conveys heavy forged workpieces with throughput up to 2500 kg/h at temperatures from 400 to 950 °C.

Interlocking alloy link track transports heavy forgings and solid metal components
Workpiece charging into heated zones through sealed vibratory entry locks
Heated tunnel lengths up to 12 meters ensuring complete steel phase transformation
Segmented gas atmosphere injection across independently controlled furnace zones

Kohnle / Kohne T/HT high-temperature continuous muffle furnaces

Continuous conveyor furnaces from Kohnle / Kohne T/HT series with metallic alloy muffles are rated for temperatures up to 1160 °C. The equipment serves protective atmosphere brazing, diffusion annealing, powder sintering, and reduction heat treatments without oxidation.

Broad temperature span from 300 to 1160 °C for bright brazing and powder sintering
Rapid gas cooling sections or indirect water-cooled cooling tunnels at furnace exit
Deep sub-zero cooling attachments down to -80 °C for cryogenic austenite conversion
Integrated zinc vapor extraction systems for clean processing of galvanized products

Replacement components for Kohnle / Kohne furnaces

Scheduled preventive maintenance and replacement of wear components restore original operating throughput across Kohnle / Kohne thermal installations. Component coverage spans conveyor wire mesh, alloy muffles, SiSiC rollers, radiant heating tubes, and atmosphere sensors.

Woven wire conveyor belts and articulated link tracks made of heat-resistant alloys
Silicon carbide ceramic rollers along with friction-resistant SiSiC guide plates
Radiant burner tubes, recuperative gas burners, and high-output electric heating rods
Hot atmosphere circulation fans, zirconium oxygen sensors, and water seal assemblies

Selection guidelines for mesh conveyor belts

Reliable continuous operation of Kohnle / Kohne conveyor furnaces in FH and BLH series requires selecting the appropriate woven wire belt geometry.

Depending on thermal process temperatures, workpiece weight, and mechanical drive tension, operators employ balanced spiral weave belts with reinforced welded selvedges made from high-temperature nickel-chromium alloys.

Key ordering parameters include nominal furnace chamber width, spiral pitch, cross-rod diameter, and overall heating tunnel length. Regular inspection of roller supports and silicon carbide guide plates prevents belt sagging and ensures smooth tracking throughout heating zones.

Technical monitoring of BLH alloy muffles

Sealed alloy muffles in Kohnle / Kohne BLH series furnaces endure constant operating temperatures from 550 to 950 °C alongside reactive carbonitriding atmospheres.

Scheduled maintenance procedures require non-destructive ultrasonic and visual examination of welded joints and muffle walls to identify thermal fatigue or deformation.

If geometric distortion or wall thinning is detected, technical teams replace the assembly with a new heat-resistant nickel-chromium alloy muffle while validating flange seal tightness.

Preserving complete atmosphere containment maintains stable carbon potential and ensures repeatable hardness results.

Maintenance of RMH ceramic roller hearths

In Kohnle / Kohne RMH series industrial furnaces, workpieces travel without belts across ceramic rollers manufactured from sintered silicon carbide SiSiC. This material delivers outstanding resistance to high-temperature bending, thermal shock, and surface friction up to 950 °C.

Maintenance schedules involve periodic inspection of external roller bearing blocks, examination of ceramic necks for hairline stress fractures, and alignment verification of drive sprockets.

When roller wear is identified, components are replaced in matched sets with calibrated adapters to ensure smooth workpiece transport without jamming.

Atmosphere regulation and oxygen probe calibration

Controlled hardening, gas carburizing, and annealing in Kohnle / Kohne furnaces demand continuous monitoring of protective atmosphere chemistry. Carbon potential inside the heating chamber is tracked through high-temperature zirconium oxygen sensors and infrared gas analyzers.

Routine servicing includes sensor calibration, cleaning atmosphere injection ports from soot deposits, and inspecting ceramic protection sheaths.

Proper sensor function enables furnace controllers to automatically adjust gas ratios in endothermic generators, ensuring uniform diffusion depth without surface oxidation.

Quench tank and discharge chute maintenance

Mechanical strength properties of heat-treated components depend on stable circulation and thermal conditions in Kohnle / Kohne quench systems.

Quenching tanks feature forced fluid circulation of quenching oils, aqueous polymers, or water alongside plate heat exchangers for precise bath temperature maintenance. Service routines include fluid viscosity analysis, filter element cleaning, and circulation impeller checks.

Special attention is directed to water cup seals on the discharge chute, preventing vapor ingress into the heating chamber to eliminate atmosphere contamination.

Inspection of heating elements and radiant tubes

Thermal energy distribution in Kohnle / Kohne furnace chambers is driven by recuperative gas burners or electric heating elements mounted within radiant tubes. To prevent local overheating and tube distortion, technicians check combustion line seals and ceramic electrical insulators.

Scheduled diagnostics involve measuring resistance across heating elements, thermographic inspection of external insulation panels, and burner flame adjustment.

During modernization programs, aged elements and tubes are replaced with advanced alloy modules to preserve high thermal efficiency and rapid heating rates.

Kohnle / Kohne and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Kohnle / Kohne and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.