Nitrogen protected brazing furnace is a device that uses nitrogen as a protective gas during the brazing process, which can effectively prevent oxidation of the welded parts during heating and improve the quality of brazing. When choosing a nitrogen protected brazing furnace, multiple factors need to be considered. Let's take a detailed look below!

A commonly used atmosphere vacuum brazing furnace (click on the image to view product details)

Heating method, temperature range, and uniformity
Resistance heating: With a simple structure, low cost, and precise temperature control, it is suitable for small and medium-sized production and laboratory environments.
Temperature range: Select a brazing furnace that can meet the required temperature range according to the requirements of brazing materials and processes. Generally speaking, the temperature range of nitrogen protected brazing furnaces varies from several hundred degrees Celsius to over a thousand degrees Celsius.
Temperature uniformity: Uniform temperature distribution is important for ensuring brazing quality. When choosing, attention should be paid to the temperature uniformity index inside the furnace, which can usually achieve a uniformity of ± 5 ℃ or even higher. You can understand it by viewing the technical parameters of the device or referring to the usage evaluations of other users.

Furnace size and loading capacity
Determine furnace size and loading capacity based on production scale and workpiece size. If it is mass production, it is necessary to choose equipment with larger furnace size and loading capacity to improve production efficiency; If it is a small-scale or sample trial production, a smaller furnace can be chosen to save energy and costs. At the same time, it is necessary to consider the shape and internal structure of the furnace, whether it is convenient for the placement of workpieces and the uniform distribution of nitrogen gas.

Nitrogen supply and control system
Nitrogen purity: During the brazing process, the purity of nitrogen has a significant impact on the quality of brazing. Generally, nitrogen purity is required to be above 99.9%. For some high-precision brazing processes, higher purity nitrogen may be needed. Therefore, it is necessary to choose a brazing furnace that can match the high-purity nitrogen supply system.
Flow control: Accurate nitrogen flow control is the key to ensuring brazing effectiveness. The equipment should be equipped with a reliable nitrogen flow control system that can accurately adjust the nitrogen flow rate according to different process requirements. At the same time, the intake method and distribution of nitrogen gas should be considered to ensure that the nitrogen gas in the furnace can evenly cover the surface of the workpiece and provide good protection.

Automaticity
Automated control: Choosing a brazing furnace with automated control functions can improve production efficiency and product quality stability. For example, equipment with functions such as automatic temperature control, automatic adjustment of nitrogen flow rate, and automatic control of workpiece entry and exit from the furnace can reduce manual operation errors and improve the consistency of the production process.
Data recording and traceability: Customized brazing furnaces also have data recording and traceability functions, which can record parameters such as temperature, time, nitrogen flow rate, etc. during each brazing process, facilitating the tracking and analysis of product quality, helping to optimize processes and solve production problems.

Brand and after-sales service
Brand reputation: Choosing a reputable nitrogen protected brazing furnace usually ensures better product quality and performance.
After sales service: Good after-sales service is crucial for the long-term stable operation of equipment. Choose a supplier with comprehensive after-sales service, including timely technical support, equipment maintenance, and parts supply. Before purchasing, you can inquire with the supplier about their after-sales service content and response time to ensure timely resolution in case of equipment problems.

Metal molybdenum screen nitrogen protection brazing furnace (click on the picture to view product details)

When choosing a nitrogen protected brazing furnace, it is recommended to consult relevant technical personnel to customize a furnace suitable for your own experiment or production, so as to ensure higher efficiency!Click to learn more Vacuum furnaces! Or click on online customer service to learn more about product information!