1. Introduction
In aerospace applications, it forms jet engine turbine disks, compressor blades, casings, and rocket engine propellant pumps. Within energy and chemical industries, it serves as gas turbine rotors, nuclear reactor fasteners, and acid-resistant valves and drilling tools for deep oil wells. Furthermore, it stands as the material of choice for metal 3D printing to manufacture high-performance complex structural components.
2. Process
To prevent oxidation, relieve stress, and soften Inconel 718 during heat treatment, vacuum annealing is an essential process:
1. Low-temperature preheating: 650°C, hold for 30 minutes;
2. High-temperature preheating: 850°C, hold for 30 minutes;
3. High-temperature annealing: 980°C, hold for 1 hour;
4. Rapid cooling.
3. Technical Specifications
The SIMUWU RVA-8812 vacuum annealing furnace is equipped with a three-stage diffusion pump system and a molybdenum-lanthanum alloy heating chamber, ensuring thorough uniformity and stability throughout the annealing process. Below are the specific technical specifications for the RVA-8812:
| Furnace type | Horizontal , single room, internal circulation |
| Loading method | Front loading |
| Max. loading weight | 1000kg (Including jig) |
| Ultimate vacuum (cold furnace, after drying and degassing) | Better than 1*10-3 pa |
| Working vacuum | 6×10- 3 pa |
| Time required to vacuum the work | ≤40 min (after diffusion pump preheating, empty furnace, cold state) |
| Power supply | 3 Phase 380V (±5% );50Hz (Customized) |
| Pressure rise rate (cold and empty furnace) | ≤ 0.5 Pa/h |
| Effective working zone ( WxHxL ) | 800×800×1200mm |
| Max.design temperature | 1300℃ |
| Working temperature | 500-1250 ℃ |
| Temperature uniformity | 9 points temp testing (±5℃) (standard AMS 2750F) |
| Temperature control accuracy (℃) | S type thermocouple ≤ ±1 ℃ |
| Temperature control instrument accuracy (℃) | ≤ 0.1 ℃ |
| Heating zone | 3 Zones separate temperature control |
| Empty furnace heating rate | 0~25℃ /min (adjustable and controllable rate) |
| Time to heat the workpiece to the required temperature | ≤ 60 min |
| Temperature uniformity (vacuum, empty furnace, 500-1250℃) | ± 5 ℃ |
| Heating power | 250 KW |
| Total power | 280 KW |
| Cooling motor power | 18.5 KW |
| Temperature control method | Intelligent programmable temperature controller for automatic temperature control |
| Control method | PLC automatic/manual interlock protection control |
| Max. inflation pressure | ＜2 bar(absolute pressure) |
| Cooling method | Air cooling/natural cooling |
| Cooling gas | Nitrogen or argon (purity: 99.99% or 99.999%) |
| Cooling rate (empty furnace 1200℃~150℃) | ≤ 30 min |
| Partial pressure pressure | 50-2000Pa manual and automatic control |
| Operation model | Manual/Automatic control |
| Equipment color | Customized |
If you have any questions, please feel free to contact kevin.liu@vacfurnace.com. SIMUWU will be happy to assist you.
