Product Series: RVN-Series
Category: Vacuum Heat Treatment Furnace
Max. Working Temperature: 1300℃
Ultimate Vacuum Degree：6.7*10-1 Pa
Medium：N₃/N₂/O₂
Application：38CrMoAl、40Cr、35CrMo、42CrMo、20CrMo、25Cr₂MoV、30CrMo、35CrMoV、40CrNiMoA、20CrMnTi、06Cr19Ni10、06Cr17Ni12Mo₂、1Cr13、2Cr13、06Cr18Ni11Ti、20MnV、37SiMn₂MoV、15CrMo、38CrSi、25Cr2Ni4WA,etc.
Introduction：
Vacuum nitriding furnace is an industrial equipment used for nitriding metal workpieces in a low-pressure (vacuum) environment. Its principle involves placing the workpiece in a sealed furnace chamber, evacuating it to a vacuum, and heating it to 450~650°C. A medium such as ammonia (NH₃) is then introduced. By controlling the temperature, vacuum level, and gas flow rate, nitrogen atoms are diffused into the surface layer of the workpiece, forming a nitride layer with high hardness and wear resistance while maintaining the original toughness of the core.
It is widely used for surface strengthening of gears, bearings, molds, precision parts, etc., and is particularly suitable for materials such as stainless steel and alloy steel.
Main Advantage
1.Superior Nitrided Layer Quality: The vacuum environment reduces oxidation and decarburization, resulting in a uniform nitride layer free from defects such as black brittleness and pores, with high surface finish.
2.Significant Performance Improvement: The nitride layer boasts higher hardness, and its wear resistance, corrosion resistance, and fatigue resistance are superior to those achieved by traditional gas nitriding.
3.Wide Material Adaptability: It can process materials that are prone to issues in traditional nitriding, such as stainless steel and high-temperature alloys, avoiding oxidative loss of chromium.
4.Strong Process Controllability: Through precise control of temperature, vacuum level, and nitrogen potential, the depth of the nitrided layer can be accurately adjusted to meet the requirements of different parts.
5.Environmental Friendliness and High Efficiency: It reduces harmful gas emissions, features fast heating speed, short processing cycles, and lower energy consumption.
Related Configuration
Related Configuration
1.Heating Chamber
Heating Chamber : Circular/Square
Heating Element : Graphite / Molybdneum
The heating chamber consists of a stainless steel frame, heat insulation layer, heating elements, insulation parts, and a furnace bed. According to customer requirements, heating elements are made of different materials for various scenarios, with a maximum operating temperature of up to 1300℃ and excellent furnace temperature uniformity.
2.Vacuum system
Well-known domestic and foreign vacuum pump brands, such as EVP, Leybold, etc., are matched according to customer needs.
3.Control system
The operation control of this equipment is performed by the Siemens S7-1200 programmable logic controller. Interlock protection control is adopted for the equipment’s vacuum pump, valves, heating power supply, cooling fan, and other components. The system can judge and alarm abnormalities occurring during equipment operation, enabling fully automatic control. The network system supports remote network control and data transmission functions. All low-voltage components use international brands such as Siemens, Schneider, and Phoenix, which are highly reliable in terms of quality, performance, and craftsmanship, reducing the failure rate of the control system.
The network system supports remote network control and data transmission functions.
Remote fault diagnosis, remote process debugging, etc.
Supports software upgrade and update.
4.Other Systems
Our temperature measurement system adopts a 9-point temperature monitoring method to accurately track the product temperature in real-time, ensuring that the furnace temperature uniformity is maintained within the range of ±3℃ to ±5℃.
The pneumatic system can be automatically controlled via a touch screen, enabling pneumatic control of the entire gas circuit.The gas charging system can be set up once without the need for re-adjustment; its on-off operation is realized through solenoid valves, making it simple, convenient, and easy to regulate.
A water cooling system is also equipped, mainly used to control the temperature of the furnace body, vacuum pump, and heating electrodes, ensuring the normal operation of the vacuum furnace.
Technical Parameter
| Model | Effective Working Zone (W*H*L) | Max.
Temperature |
Ultimate
Pressure |
Temperature Uniformity | Loading Capacity | Medium |
| RVN -446 | 400*400*600mm | 650℃ | 6.7*10-1Pa | ±5℃ | 200kg | NH3 -N3-O2 |
| RVN – 557 | 500*500*700mm | 650℃ | 6.7*10-1Pa | ±5℃ | 300kg | NH3 -N3-O2 |
| RVN – 669 | 600*600*900mm | 650℃ | 6.7*10-1Pa | ±5℃ | 500kg | NH3 -N3-O2 |
| RVN- 7710 | 700*700*100omm | 650℃ | 6.7*10-1Pa | ±5℃ | 700kg | NH3 -N3-O2 |
| RVN- 8812 | 800*800*1200mm | 650℃ | 6.7*10-1Pa | ±5℃ | 1000kg | NH3 -N3-O2 |
| RVN – 9915 | 900*900*1500mm | 650℃ | 6.7*10-1Pa | ±5℃ | 1200kg | NH3 -N3-O2 |
| Remark: The working zone of equipment could be customized base on customer’s production. | ||||||
After-Sales and Acceptance Services
After the completion of production, the manufacturing plant will conduct factory acceptance test, including:
1.Ultimate vacuum test
2.Pressure rise rate test
3.Inspection of the completeness of all equipment systems
After the equipment is delivered to the user’s site, site acceptance test will be carried out, including:
1.Overall installation
2.Overall debugging
3.User training
4.Document handover
Warranty
The warranty period is one year from the date of final acceptance. It covers non-human-damaged components (excluding consumables/wear parts), as well as manual maintenance services and transportation costs incurred during the warranty period.
