Metal Hardening Furnace | Gas-Fired Bogie Hearth System for Precision Heat Treatment & Stress Relief Applications
JIANGSU YINUO THERMAL ENERGY TECHNOLOGY CO., LTD builds industrial-grade Metal Hardening Furnace systems. They are made for tough heat treatment and stress relief jobs. Our gas-fired bogie hearth furnace carries a 350 mm refractory fiber lining. Working temperatures run from 550℃ to 950℃, and temperature control precision stays at ≤±2℃. The production facility covers 20,000㎡, fixed assets reach 80 million yuan, and more than 100 technical professionals work on site. Furnace chamber dimensions and loading capacities can be customized to match your manufacturing requirements. After 1-hour heat preservation, temperature uniformity holds within ±8℃. That gives consistent metallurgical outcomes for precision components.
What Makes Our furnace System Stand Out?
Our device features strong multi-zone independent PID temperature control technology for unmatched thermal precision. The system can realise the temperature homogeneity of ±5℃ in the heating chamber, and effectively eliminate the hardness inconsistencies and workpiece deformation.
The gas-fired bogie-hearth concept provides a high degree of flexibility for batch operation. Your components are mounted on a movable bogie which travels at 5–7 m/min so you have complete access to the furnace chamber for loading and unloading operations. The electric door of the lifting furnace has a wedge locking construction, and the operation speed is 6 m / min, ensuring the safety and efficiency of thermal processing cycles.
Our approach to thermal engineering is energy wise. The multi-layer composite light-weight fibre lining saves 25%--56% energy comparing with traditional heating furnaces. The temperature rise of the furnace shell is very small, at working temperature 950℃, furnace top ≤45℃ and side walls ≤40℃.
Switchable pulse combustion modes (high/low fire) or regenerative combustion choices are available in the combustion system. This flexibility ensures you can maximise your fuel efficiency for your particular heat treatment operations, and still provides precise thermal control throughout the whole hardening cycle.
Technical Specifications
| Parameter |
Specification |
| Furnace Type |
Gas-fired bogie hearth furnace |
| Furnace Chamber Dimension |
Customized per customer's requirements |
| Furnace Loading Capacity |
Customized per customer's requirements |
| Refractory Fiber Lining Thickness |
350 mm |
| Fuel Medium |
Natural gas |
| Fuel Calorific Value |
8500 Kcal/Nm³ |
| Working Temperature |
Standard 550℃, adjustable up to 950℃ |
| Furnace Temperature Uniformity |
≤±8℃ to ±1℃ (after 1 h heat preservation) |
| Temperature Control Precision |
≤±2℃ |
| Adjustable Heating Rate |
50–200℃/h (under full workpiece loading) |
| Furnace Shell Temperature Rise |
Top ≤45℃, side wall ≤40℃ (at 950℃) |
| Temperature Control Zones |
Configured per customer's heat treatment process |
| Combustion System |
Switchable pulse or regenerative combustion |
| Typical Application |
Stress relief annealing |
| Control System |
Semi-automatic PID + Omron PLC; manual mode available |
| Furnace Door Lifting Speed |
Approx. 6 m/min, electric hoist drive |
| Bogie Moving Speed |
5–7 m/min |
| Max Bogie Travel Stroke |
Full movement out of furnace chamber |
| Bogie Driving Type |
Chain drive, self-propelled |
| Loading Method |
Workpieces hoisted onto movable bogie surface |
| Exhaust System |
Multiple outlets at top and side walls, chimney height ≥2 m |
| Customization |
Available based on customer requirements |
Key Applications Across Industrial Sectors
Your Metal Hardening Furnace serves critical manufacturing processes where material integrity determines operational success. In automotive powertrain manufacturing, the system handles stress relief annealing of transmission components and drive shafts, where precise temperature control prevents surface cracking while maintaining core toughness under high-torque conditions.
Tool and die manufacturers gain from one thing our furnace does well. It processes high-speed steels and tool steels with minimal distortion. Heat stays under control inside the chamber, so grinding costs after treatment drop. Dimensional accuracy holds for injection molds and cutting tools too.
Aerospace fastener production calls for strict thermal processing standards. Our bogie hearth setup takes high-strength alloy components in batches. Uniform heating is what fatigue-resistant metallurgical properties require, and that is what the unit delivers. No hydrogen embrittlement risk gets introduced along the way.
Heating rate is adjustable (50–200℃/h). You can customize the temperature control zones too. That lets you tune thermal cycles for various alloy compositions. Carbon steels, alloy steels, and specialized materials all work. The furnace adapts to your metallurgical requirements.
Advanced Control and Safety Features for Metal Hardening Furnace
The control system is semi-automatic. It pairs imported PID intelligent instruments with Omron PLC technology. Process management stays reliable, and manual override is available. Temperature regulation and zone control run automatically. You keep complete operational flexibility.
The exhaust system has outlets placed strategically at the furnace top and side walls. Chimney height extends at least 2 m above your factory roof. This setup ensures efficient combustion gas evacuation. Workplace air quality standards are maintained as well.
The furnace door runs on electric lifting mechanisms. Wedge locking structures hold the thermal chamber shut. A chain-driven, self-propelled bogie system for the Metal Hardening Furnace means no manual handling is needed. That makes the workplace safer and the operation more efficient.
FAQ
Q: What temperature range can your product achieve?
A: The standard setup runs at 550℃, and it can be adjusted up to 950℃. We can customize the working temperature during the design phase. That way it matches your heat treatment requirements and material specifications.
Q: In what way does the bogie hearth design make production more efficient?
A: The bogie can be moved, so the whole furnace chamber is reachable. Loading and unloading then happen fast. A chain drive propels the unit itself, and it travels at 5–7 m/min. That cuts the handling time between thermal processing batches, so throughput goes up.
Q: What fuel types are compatible with this furnace system?
A: The system is engineered for natural gas with a calorific value of 8500 Kcal/Nm³. The combustion system can be configured for alternative fuel sources during the customization process to accommodate your facility's energy infrastructure.
Q: Can temperature uniformity be verified according to industry standards?
A: Yes. Our temperature uniformity of ≤±8℃ after 1-hour heat preservation meets industrial heat treatment standards. The multi-zone control system allows calibration and verification testing to ensure compliance with your quality management protocols.
Q: Which maintenance intervals do you suggest to keep performance at its best?
A: Check the refractory fiber lining for damage once a quarter. Do the same for the combustion system parts and the control instrumentation. Every six months, lubricate the bogie drive mechanism and the furnace door lifting system, and check their alignment. That keeps the unit running reliably.
Partner With Industrial Heating Experts
Contact us at info@yinuofurnaces.com to discuss your Metal Hardening Furnace heat treatment application requirements.
