Quenching Temperature for Mesh Belt Furnaces:The quenching temperature in a mesh belt furnace varies depending on the type of material being processed and the required properties. Key information based on search results is as follows:

General Principle:The quenching temperature generally needs to be above the critical temperature of the material (Ac3 or Ac1) to fully or partially transform the material into austenite. For hypoeutectoid steels, the quenching temperature is typically 30~50°C above the Ac3 temperature; for hypereutectoid steels, it is 30~50°C above the Ac1 temperature.

Specific Examples:In specific applications, such as processing Grade 10.9 bolts (material: 40Cr), the quenching temperature is set at 860-870-870-860°C for zones 1-4 respectively, with a quenching time of approximately 90 minutes.

Precautions:
Temperature Control: Excessively high quenching temperatures can lead to coarse austenite grains, adversely affecting material properties; temperatures that are too low may result in incomplete transformation and poor quenching effectiveness.
Cooling Rate:The cooling rate after quenching is also crucial and must exceed the critical cooling rate of the steel to ensure the formation of the desired martensitic or bainitic microstructure.
In summary,the standard quenching temperature for a mesh belt furnace needs to be determined based on the specific material and requirements, but it is typically set above the material’s critical temperature. Precise control is essential to achieve optimal quenching results. The mesh belt itself must be heat-resistant. In practice, professional heat treatment technicians operate according to specific material specifications and technical requirements.