How to choose the material for customized heat treatment vacuum furnace chamber?

06-16-2025       Author: KJ technology

The selection of materials for customized heat treatment vacuum furnaces requires comprehensive consideration of multiple factors such as high temperature performance, corrosion resistance, thermal stability, cost, and processability. The following is a comparative analysis and selection recommendation of common furnace materials:

Key factors in selecting furnace materials

Temperature range:

Low or medium temperature process (≤ 1000 ℃): Stainless steel is preferred due to its low cost and easy processing.

High temperature process (≥ 1200 ℃): Graphite or ceramics should be selected to meet the high temperature performance requirements.

Ultra high temperature process (≥ 2000 ℃): Rare metal materials such as molybdenum or tungsten need to be considered.

Atmosphere and Environment:

Inert atmosphere or high vacuum environment: graphite, ceramic or metal materials can be selected.

Oxygen containing environment: Avoid using easily oxidizable materials such as graphite, molybdenum, tungsten, etc. unless special protective measures are taken.

Workpiece characteristics:

High cleanliness requirements: Avoid using materials that may contaminate the workpiece, such as certain metal materials that may release impurities.

Workpiece size and shape: The machinability and plasticity of the furnace material need to be considered to ensure that it can meet the processing requirements of the workpiece.

Cost budget:

The cost of different materials varies greatly, and it is necessary to make reasonable choices based on the budget.

Consider long-term operating costs, including maintenance, replacement, and other expenses.

Processing and maintenance:

Processing difficulty: Ceramic and rare metal materials are difficult to process and require professional equipment and technology.

Maintenance cost: Some materials may require special maintenance, such as regular cleaning, anti-oxidation treatment, etc.

Material selection suggestions

Prioritize process requirements: Select the most suitable furnace material based on the temperature range, atmosphere environment, and workpiece characteristics of the heat treatment process.

Balancing cost and performance: While meeting process requirements, try to choose materials with lower costs and easier maintenance.

Consult professional manufacturers: Communicate with professional heat treatment vacuum furnace manufacturers to obtain more detailed material selection advice and technical support.