How to distinguish between box furnace and atmosphere furnace? How do we choose the right equipment?

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How to distinguish between box furnace and atmosphere furnace? How do we choose the right equipment?

Protech atmosphere furnace

Protech Box furnaces

1. Working principle and gas environment
Box furnaces usually use electric heating, and the furnace chamber is a closed structure. Heating treatment is carried out in a natural air environment. It is suitable for conventional processes that do not require special atmospheres, such as annealing, tempering or drying.
The core feature of the atmosphere furnace is that it can be introduced with specific protective gases (such as nitrogen, hydrogen or inert gas). By precisely controlling the atmosphere in the furnace, it can prevent material oxidation or achieve special processes such as carburization and sintering.

2. Structural design and sealing
Box furnaces have a simple structure, and the furnace door usually adopts a common sealing design, which is low in cost and suitable for scenes with low environmental requirements.
Atmosphere furnaces require a highly sealed structure, equipped with gas inlet and outlet and pressure control systems to ensure a stable atmosphere in the furnace and avoid gas leakage. Therefore, the manufacturing process is more complicated and the price is higher.

3. Comparison of application fields
Box furnace: widely used in basic scenarios such as metal heat treatment, ceramic sintering, laboratory sample heating, etc., with simple operation and low maintenance cost.
Atmosphere furnace: dedicated to precision material processing, such as semiconductor component sintering, magnetic material preparation, metal powder metallurgy, etc., especially suitable for metals sensitive to oxidation (such as titanium alloys) or processes requiring a reducing environment.

4. Temperature control and uniformity
The temperature control accuracy of the box furnace is generally within ±5°C, which is suitable for processes that do not require strict temperature fluctuations.
The atmosphere furnace has a higher temperature control accuracy (±1~3°C), and the gas circulation system in the furnace can improve temperature uniformity and ensure the consistency of material performance.

5. Safety and operation requirements
Box-type furnaces are easy to operate and only require high temperature protection, which is suitable for ordinary industrial environments.
Atmosphere furnaces involve flammable and explosive gases, so they need to be equipped with gas monitoring, explosion-proof devices and professional operators, and have a higher safety threshold.

Summary: The core difference between a box furnace and an atmosphere furnace is whether the atmosphere in the furnace needs to be controlled. After understanding the difference between the two, users can choose equipment with a higher cost performance ratio according to process requirements, budget and safety requirements. Whether it is an economical and practical box furnace or a high-precision atmosphere furnace, correct use can significantly improve production efficiency and product quality!

Zhengzhou Protech provides customized services for heat treatment equipment. We can customize different temperatures,
furnace sizes, digital displays/touch screens, control systems/vacuum systems, etc. according to customer needs. Welcome to consult.

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