Non Muffle Push Furnace for Carbonitriding & Metal Hardening Processing

Muffle-free pusher quenching furnace is an integrated continuous atmosphere heat treatment line without sealed heat-resistant steel muffle liner inside hearth. Heating radiant tubes are directly installed in refractory chamber for full radiation heat transfer, equipped with auto feeding gas seal, multi-zone carburizing heating, automatic dropping quenching tank.It realizes full automatic continuous carburizing, carbonitriding & bright hardening for mass metal parts. Different from traditional muffle-type pusher quenching furnace, it eliminates high muffle replacement cost, improves thermal efficiency & atmosphere uniformity, widely used for automotive gears, fasteners, machinery structural parts high-volume hardening production.

1.Inlet Gas Purge & Flame Seal ChamberDouble nitrogen gas curtain + flame barrier to isolate air, prevent workpiece decarburization & oxidation, pre-purge protective atmosphere for loaded pusher plates.

2.Muffle-Free Anti-Carburizing HearthLightweight mullite fiber lining without steel muffle tank; side/top radiant tube heaters; internal circulation fan to homogenize temperature & carbon potential all over hearth.

3.Multi-Zone Temperature & Carbon Potential Control SystemSeparated preheating, carburizing, soaking zones with independent PID controller; oxygen probe closed-loop carbon control, stable case depth output.

4.Hydraulic / Servo Pusher Conveying SystemHeavy-duty SiC/mullite wear-resistant pusher plates & ceramic slide rails; intermittent uniform pushing, auto plate recycling after discharging.

5.Auto Drop Quenching MechanismAfter high temperature soaking, pusher plate shifts to discharge position, automatic turnover plate drops workpieces into quenching tank with air isolation gas curtain.

6.Integrated Quenching Cooling System (Customizable)

1. Oil quenching unit: circulation stirring, water cooling heat exchanger, oil filtration & separation
2. Polymer water quenching unit: cooling water tank, concentration auto adjustment
3. Isothermal molten salt quenching unit: salt bath heating & slag filtration

7.Post Quench Washing & Tempering Connection Station (Optional Turnkey Line)Auto material lifting → spray washing → hot air drying, can connect secondary tempering pusher furnace to form full automatic heat treatment line.

8.PLC Intelligent Control Cabinet10-inch HMI touch screen, store hundreds of carburizing & quenching process recipes; multi-safety interlock alarm for over temp, low gas pressure, tank liquid level; remote monitoring & data export available, CE electrical standard.

1.Ultra Low Long-Term Operation CostZero muffle tank replacement & maintenance cost; thermal efficiency improved by 25%~32%, power consumption per ton workpiece reduced over 20%; protective gas consumption cut by 15%~25%.

2.Stable Quenching & Carburizing Quality, Higher YieldFull hearth air circulation, cross-section temperature difference ≤±5℃, carbon potential fluctuation ≤±0.05%C; uniform case depth & hardness, less soft spot, oxidation & decarburization, greatly reduce reject rate.

3.Higher Production Capacity for Large & Heavy WorkpiecesNo inner size limit of muffle tube, wider & taller hearth design, single plate loading capacity increased by 40%, perfect for heavy gears, shafts & structural parts mass production.

4.No Carbon Soot Accumulation, Less Furnace Cleaning WorkOpen circulation hearth structure quickly exhaust pyrolysis volatiles without carbon deposit on muffle wall, furnace cleaning frequency reduced by 60%.

5.Easy Maintenance & High Equipment UptimeRadiant tubes & heating elements can be replaced separately without full furnace shutdown; ceramic slide rails anti-carburizing & wear resistant, low breakdown rate under 24h non-stop running.

6.Full Automatic Line, Save Labor CostOne-man patrol operation from feeding, carburizing, auto quenching to washing, fit overseas factories with labor shortage.

Processes

Controlled atmosphere carburizing hardening, carbonitriding quenching, bright oxidation-free hardening, medium-high temperature normalizing & quenching, thin layer case hardening for gears, high strength fastener hardening, tool steel quenching.

Target Industries

1.Automotive Parts: Transmission gears, drive shafts, bearings, chassis fasteners

2.General Machinery: Sprockets, chains, oil pump sleeves, construction machinery components

3.Standard Hardware Fasteners: Bolts, nuts, rivets, high tensile fasteners

4.Cutting Tools: Drill bits, milling cutters, mold frames

5.Textile & Agricultural Machinery Wear Parts