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Mosten Alloy Co., Ltd.

Preparation method and application of molybdenum tungsten alloy

  • Mosten
  • 17 Jan

The production methods of molybdenum tungsten alloy are powder metallurgy, vacuum arc smelting and vacuum electron bombardment smelting. Powder metallurgy is the most widely used method because the process is simple and the alloy ingot with fine grain can be obtained. The main processes of powder metallurgy are: mechanical mixing of molybdenum powder and tungsten powder in proportion; pressing into original billet by mechanical press or isostatic press; and sintering alloy ingot in high temperature sintering furnace through hydrogen. The sintering temperature increases with the increase of tungsten content, which ranges from 2150 to 2300°C. Finally, the sintered ingot is rolled or forged.

Molybdenum tungsten alloys can be used at higher temperatures than molybdenum or molybdenum alloys. If molybdenum-tungsten alloy is used as electrode, mouth and thimble parts in a blast furnace for producing high melting point refractory ceramic fiber, its service life is much longer than that of pure molybdenum products. Mo30W has higher corrosion resistance than pure molybdenum, and is mostly used in some corrosion resistant parts of zinc liquid temperature measuring tube, zinc liquid pump rotor and zinc smelting furnace. Molybdenum-tungsten alloy can also be used in gas rudder and guard plate of solid rocket engine because of its high melting point, good corrosion resistance and good flame erosion resistance of solid particles. The nominal components of commonly used molybdenum tungsten alloys are: Mo-30W, Mo-50W and Mo-85W, etc. molybdenum tungsten alloy can be regarded as a transition alloy between molybdenum and tungsten. therefore, the alloy can be applied in a broad temperature range between molybdenum and tungsten.