Vacuum induction melting process

Vacuum induction melting is a commonly used metal melting process, which is mainly used for the preparation of high-quality alloys and the melting of special metals. By heating the metal at high temperature in a vacuum environment, it uses the principle of induction heating to melt the metal, thus achieving precise control and high quality melting process.

The process steps of vacuum induction melting are as follows:

1. Preparation: First of all, it is necessary to prepare the metal materials and related auxiliary materials to be melted, such as melting furnaces, induction coils, protective covers, etc. At the same time, the smelting equipment needs to be inspected and prepared to ensure its normal operation and safety.

2. Charging and sealing: Put the metal material to be melted into the melting furnace, and ensure that the seal is good to ensure the formation and maintenance of a vacuum environment.

3. Vacuuming: Start the vacuum pump to extract the air and impurities in the melting furnace to form a high vacuum environment. This is to prevent the metal from reacting with oxygen and other gases at high temperatures, ensuring the purity and quality of the smelting.

4. Heating and melting: Through induction heating principle, the metal is heated at high temperature in a vacuum environment. The induction coil produces an alternating magnetic field, which causes eddy currents to occur inside the metal, thereby generating heat and gradually melting the metal.

5. Melting control: In the melting process, real-time monitoring and control of temperature, pressure and melt status are needed to ensure the accuracy and stability of melting. It can be controlled by means of temperature control system, pressure sensor and melt surface morphology observation.

6. Baking and cooling: When the metal is completely melted, the heating can be stopped, and the melt can be poured out or poured into the corresponding mold for cooling and solidification. During the cooling process, it is necessary to control the cooling speed and cooling method to obtain the required metal structure and properties.

Vacuum induction melting process has the following advantages:

1. High purity: In a vacuum environment, the contact between the metal and oxygen and other gases is reduced, which can effectively prevent the mixture of oxidation and impurities, so as to obtain high purity metal.

2. High quality: The principle of induction heating makes the metal heat evenly, the melting process is controlled accurately, and high quality metal melt and solidification structure can be obtained.

3. Flexibility: Vacuum induction melting is suitable for melting a variety of metals and alloys, which can meet different material and process requirements.

4. Environmental protection: Under vacuum environment, there is no gas emission and pollutant generation during the smelting process, which meets the requirements of environmental protection.

In short, vacuum induction melting is a high-quality metal smelting process by melting high-quality metals in a vacuum environment.