How To Select TZM Molybdenum Alloy Plate?

1. Surface state selection
The surface state of the TZM molybdenum alloy plate directly affects its service performance and processing difficulty:
Rolled surface: The original surface state after rolling, with a roughness Ra of about 0.4 μm-1. 0 μm. It is suitable for structural parts that do not require a high surface, and the cost is low.
Alkali face washing: The oxide layer and oil stain are removed through chemical cleaning. The surface is uniform silver gray, and the roughness Ra is about 0.2 μm-0. 4μm. Suitable for most high-temperature structural parts and die applications.
Polished surface: After mechanical grinding, the surface roughness Ra is less than 0.2 μm. Suitable for precision moulds and optical components that require a high precision fit.
Coating surface: Titanium nitride (TiN), molybdenum silicide (MoSi ₂), and other coating treatments can be carried out according to needs, which significantly improves oxidation resistance and corrosion resistance.

2. Special specification customization
For large equipment and special needs, TZM molybdenum alloy plate can provide customized services:
Oversize: Oversize plates with a width of 600mm and a length of 2000mm can be customized, and large high-temperature furnaces and appliances are required for structural parts.
Special-shaped parts: through precision forging and CNC processing, complex-shaped TZM alloy components can be manufactured, such as rocket engine nozzles, high-temperature mould cavities, etc.

1 High temperature performance indicators
For high-temperature applications, focus on the following performance indicators:
High temperature tensile strength: The tensile strength at operating temperature is a key indicator to measure the bearing capacity of materials. Tensile strength of TZM at 1000 ℃ should not be less than 350MPa.
Creep resistance: The creep rate under high temperature load is an important parameter for evaluating the service life of materials. The creep strain rate of the TZM at 1300 °C should be less than 10 Ⅵ +/s.
Recrystallization temperature: The higher the recrystallization temperature of the material, the better the high-temperature stability. The recrystallization temperature of TZM should not be lower than 1400 ℃.

2 Thermophysical performance indicators
How substances manage temperature is important for how effectively they function:
How efficiently it transfers warmth: If a material conducts thermal energy properly, it heats up fast and prevents high-temperature spots. TZM should move color at least 100 W/.
How it expands with temperature: If a material doesn't enlarge significantly at the time warmed, it possesses less tension and remains the identical dimension. TZM should increase about 5 × 10 → −/K.
To do this approach, how hot it reaches prior to liquefying: TZM melts approximately 2620 °C, thus it will not liquefy during the time it's extremely warm.

3 . Corrosion resistance index
When used in corrosion, the following properties should be paid attention to:
High temperature oxidation resistance: The oxidation rate in high temperature air is a key indicator. The oxidation resistance temperature of TZM can be increased from 600 °C to 1600 °C by surface coating.
Molten metal corrosion: When used in die casting molds, it is necessary to evaluate the corrosion resistance of the material to molten metal. TZM has good corrosion resistance to molten aluminum, zinc, and other metals.
Molten salt corrosion: In applications such as nuclear reactors, it is necessary to evaluate the corrosion resistance of materials in molten salt. The corrosion rate of TZM in FLiBe molten salt should not exceed 1.0 μm/year.

1 Common model selection misunderstandings
Only look at price but not performance: Low-priced products often have defects in material purity and processing technology, which may lead to equipment failure and potential safety hazards.
Neglect of surface treatment: Surface treatment directly affects the oxidation and corrosion resistance of materials, and neglect of surface treatment may lead to shortened service life.
Pursuit of high performance: It will cost to choose high-performance materials that exceed actual requirements, and the performance level should be selected according to actual working conditions.

2 Precautions for Special Applications
Areas: Strict control standards and traceability requirements are required, and suppliers with AS9100 certification are recommended.
In the field of nuclear energy, materials need to have good radiation resistance, and products that have passed nuclear-grade material certification should be selected.
Semiconductor field: Materials need to have a low outgassing rate and high purity. It is recommended to choose electronic-grade TZM molybdenum alloy plates.

3 Suggestions on the selection process
It is recommended to adopt the following selection process to ensure scientific selection:
Clarify application requirements and working parameters.
Determine material performance indicators and specifications according to requirements.
Screen suppliers who meet the requirements and request samples
Perform material performance testing and application validation;
Select the best products and suppliers after a comprehensive evaluation.

By following the scientific selection process and strict control, engineers and technicians can select TZM molybdenum alloy plate solutions for high-end manufacturing equipment to ensure equipment performance and reliability, and full life cycle cost.