Vacuum Annealing Furnace
The vacuum annealing furnace is a feedback-regulated heating system composed of a high-temperature furnace, a high-temperature furnace heating power supply, Labview control software, an electromagnet, a high-precision bipolar constant temperature power supply, a molecular pump unit, and a water-cooling unit.
Annealing process: Heat the sample in a strong magnetic field (or non-magnetic) environment. When heated to a certain temperature (users can set it according to their needs), continue to add a constant magnetic field and control the temperature for a period of time, and stop when the magnetic field is constant. Heating and cooling (passing inert gas can quickly cool down). Allow to cool to room temperature, then turn off the magnetic field.
Vacuum annealing furnace System structure drawing
Control method
Magnetic field control: Users can directly set the required magnetic field size through the software, and the actual magnetic field value is read by a high-precision Gaussmeter, and then the actual read-out magnetic field value is fed back to the high-precision constant current power supply. After processing by the internal software of the power supply, Directly control the output current of the high-precision constant current power supply to achieve the magnetic field required by the user and display it on the software in real time;
Temperature control: The required temperature value is directly set through the human-computer interaction interface on the software. After processing by the computer software, the instructions reach the high-temperature furnace heating controller. The controller reads the actual temperature value of the sample area through the temperature sensor (thermocouple), and adjusts the output current through its internal fuzzy control PID, so that the temperature value is stabilized within a certain accuracy range and achieves what the user needs. different temperatures.
Vacuum environment: The vacuum environment is obtained through the molecular pump group, which is displayed and monitored by the high vacuum full-scale vacuum gauge, and the detection results are transmitted to the computer in real time.
The sample to be tested can be placed in strong magnetic field, high vacuum and high temperature environment at the same time. These three experimental environments can also be used individually or in any combination.
Main Specifications:
1. The vacuum chamber and main components of this system are made of 1Cr18Ni9Ti;
2. The vacuum acquisition system used in this system is a molecular pump system; the vacuum measurement uses a digital vacuum gauge;
3. System vacuum degree and leakage rate:
① The ultimate vacuum degree of the vacuum chamber is 3*10-4Pa (cold state); molecular pump
Within 40 minutes of operation, the system vacuum degree is better than 6.6*10-4Pa;
②The leakage rate is <10-8Pa.L/s;
4. Maximum heating temperature 1000℃; temperature control accuracy: ±1℃;
5. Use inert gas protection during heating (optional);
6. Natural cooling or rapid cooling by inert gas.
| Model | Dimensions | Sample chamber size | maximum temperature | Maximum magnetic field |
| DX800-18 | φ 42 X 230mm | φ 18x100mm | 800°C | 1.35T |
| DX800-35 | φ 63X 260mm | φ 35x120mm | 800°C | 1.0T |
| DX1000-18 | φ 42 X 230mm | φ 18x100mm | 1000°C | 1.35T |
| DX1000-35 | φ 63 X 260mm | φ 35x120mm | 1000°C | 1.0T |
The main components of the vacuum annealing furnace
- Vacuum furnace and controller
- Vacuum acquisition and measurement equipment
- Magnetic field acquisition equipment
- Circulating water cooler
1. Vacuum furnace and controller
◆ The vacuum heating furnace has a vertical double-layer (water-cooled, vacuum) structure. The bottom end of the furnace body is a fixed flange. It is equipped with an electrode outlet, a thermocouple interface, a vacuum interface (KF25), and a charging and deflating valve (optional). , the upper end is a rotating door to facilitate sample replacement;
◆ A heat shielding layer is installed inside the furnace body to reduce heat loss as much as possible and ensure uniform temperature inside the furnace body;
◆ There are cooling water inlets and outlets on the upper and lower side walls of the furnace body to cool the outside of the furnace body;
◆ The heater uses a non-magnetic high-temperature heater with a maximum power of 800W;
◆ The temperature controller adopts Island Electric EP93 programmable temperature controller and is equipped with a thyristor power adjustment module to achieve precise temperature control;
◆ Workbench
The furnace body is installed on the workbench, which is made of non-magnetic materials to facilitate the entrance and exit of the furnace body to the electromagnet;
The mobile trolley is welded from carbon steel and equipped with an operating panel.
◆ Electronic control system:
The electronic control system consists of switch buttons, control relays, etc. The main control power supply is integrated in the mobile car, and the control switch buttons are all set on the operation panel.
◆ Standard parts and accessories (accessories);
Standard parts: required for equipment. Bolts (nuts, washers), fluororubber seals, etc.
Accessories:
One set of heater;
Prepare a set of sealing rubber rings and oxygen-free copper washers.
Furnace diagram
2. Vacuum acquisition and measurement equipment:
The vacuum acquisition and measurement system is integrated into a movable car to form a standard vacuum unit, which is connected to the furnace body through a metal bellows.
Main components: One 600L/S molecular pump; one molecular pump transition chamber; one 4L/S mechanical pump; one digital display composite vacuum gauge; one solenoid valve; vacuum pipelines and metal hoses.
3. Magnetic field acquisition equipment
Electromagnet, Current Source, Gaussmeter.
4. Circulating water cooling unit
In order to ensure the long-term uninterrupted operation of the electromagnet, magnetoelectric and annealing furnace body of this project, the above three equipments need to be cooled by circulating water.
Technical parameters of split circulating water cooler:
1. Optional PID intelligent temperature controller with temperature control accuracy of ±1°C;
2. Large cooling capacity of 12KW;
3. Flow rate 12-38L/min;;
4. Comes with compressor overheating protection, overcurrent protection, high and low pressure protection, phase sequence/phase loss protection, exhaust
Gas overheating protection.
5. Size: 580×680×960 (indoor), 1000×353×1000 (outdoor)
vacuum annealing furnace equipment connection diagram
