PRODUCT CATEGORIES

Vacuum Heat Treatment Furnace

Vacuum Sintering Furnace

Vacuum Brazing Furnace

The main purpose of vacuum furnace

A vacuum furnace is an industrial heating device that performs heat treatment in a near-vacuum environment. This furnace uses a vacuum system (including vacuum pumps, vacuum measuring devices, and vacuum valves) to reduce the pressure inside the furnace chamber to much less than a standard atmospheric pressure, thereby creating a vacuum environment. Heat treatment in such an environment has many advantages, such as preventing material oxidation and decarburization, and improving heating efficiency and temperature control accuracy.

Heat transfer in a vacuum furnace

In a vacuum environment, heat transfer is mainly carried out by radiation. There are no gas molecules in a vacuum, so heat cannot be transferred by conduction or convection, because both methods require matter as a medium. Radiative heat transfer is carried out in the form of electromagnetic waves and does not require any medium, so it can effectively transfer heat even under vacuum conditions. Heating elements, such as resistance wires, induction coils, or electron beams, convert electrical energy into thermal energy and transfer heat to surrounding objects in the form of radiation.

Temperature range of vacuum furnaces

The temperature range of vacuum furnaces is quite wide and can reach very high temperatures. Depending on the design and heating elements, the maximum temperature of a vacuum furnace can range from hundreds of degrees Celsius to thousands of degrees Celsius. For vacuum furnaces that use tungsten wire, molybdenum wire or graphite as heating elements, the temperature can reach more than 1600℃, or even up to about 3000℃. For example, molybdenum wire and graphite heating elements are usually used in high-temperature applications and can reach temperatures above 2200℃, while electron beam furnaces and plasma furnaces can reach higher temperatures.

Main uses of vacuum furnaces

Due to their unique working principles and environments, vacuum furnaces are widely used in many fields, including but not limited to:

Metal heat treatment: such as vacuum quenching, vacuum tempering, vacuum annealing, etc., used to improve the mechanical properties of metal materials, such as hardness, toughness, fatigue resistance, etc.

Vacuum brazing: Connecting metal parts under vacuum conditions to avoid the formation of oxides and obtain a stronger weld.

Vacuum sintering: used in powder metallurgy, such as high-temperature sintering of metal powders under vacuum to prepare dense metal parts.

Semiconductor manufacturing: used in processes such as heat treatment, annealing and deposition in integrated circuit manufacturing to improve chip performance.

Ceramic and glass processing: used for sintering of ceramic and glass products to avoid bubbles or oxidation during heating.

Scientific research experiments: used in laboratories for research in the fields of materials science, physics, chemistry, etc., providing a controllable vacuum heating environment.

A vacuum furnace is an industrial equipment for heating in a vacuum environment, heating materials under vacuum conditions through radiant heat transfer. It can achieve very high temperatures, exceeding 1600°C, and has a wide range of applications in many industrial fields, such as metal heat treatment, ceramic firing, vacuum smelting, degassing annealing of electric vacuum parts, etc. The advantage of a vacuum furnace is that it can provide an oxygen-free, pollution-free heating environment, thereby improving the effect of heat treatment and the quality of materials.