Molybdenum Boat Processing Technology

molybdenum boat

The method for processing metal molybdenum vessels relates to a method for processing metal molybdenum and molybdenum alloy vessels such as molybdenum crucible and molybdenum boat in a reduction and baking process in a metallurgical chemical process. It is characterized in that the processing process uses a molybdenum alloy plate having a thickness of 1.5 mm ≤ a plate thickness of ≤ 4 mm. The mold is heated together with the molybdenum alloy plate and maintained at a temperature of 400 to 1200 ° C, and the pressing speed of the control hydraulic machine is controlled at 5 mm/min to 1 mm/min for a deep drawing.

Use the molybdenum alloy sheet with high temperature strength and moderate plasticity to heat and heat the mold and the sheet at the same time; use the slow drawing of the hydraulic machine to make the sheet into molybdenum crucible, molybdenum boat and the like; keep the wall thickness of the vessel is less than 1.5 mm. This processing method can effectively avoid the occurrence of cracking, wrinkles and the like during the drawing process, effectively reduce the defects of the molybdenum alloy vessel, increase the yield, and prolong the life of the metal molybdenum vessel.

Molybdenum boat is mainly used in coating technology, electronics industry, power engineering, such as vacuum thermal evaporation (stamping evaporation boat), capacitor sintering, nuclear fuel sintering, thermocouple housing and so on. In fact, it is a kind of high-temperature resistant utensils, which are used in vacuum furnaces and glass melting furnaces. Compared with molybdenum crucibles, the structure is simple and low in cost. Molybdenum boats are often used in high-temperature heat treatment industries, such as vacuum furnaces, ammonia furnaces, industrial furnaces, etc. as high-temperature furnaces.

The classification of molybdenum boats is:

  1. Flat groove molybdenum boat: suitable for high wettability materials
  2. V-shaped groove molybdenum boat: suitable for materials with less wettability;
  3. Elliptical grooved molybdenum boat: suitable for materials in molten state;
  4. Spherical groove molybdenum boat: suitable for expensive materials such as gold and silver;
  5. Narrow groove molybdenum boat: this design can prevent the evaporation material from getting into the filament clamp;
  6. Steamed aluminum boat: The surface of the boat body is coated with a layer of alumina to help the evaporation boat to resist the highly corrosive molten material.

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