Molybdenum News Center

Drawn processing 

Molybdenum wire drawing machine drawing wheel is now adopted, with carbide drawing die, when the drawing die and the lubricant temperature control during this post-processing, first, the lubricant coating on the surface to be heated and dried particularly important because molybdenum tungsten soft and easy to stick compared with the mold, the molybdenum wire heating temperature should be below the tungsten wire drawing die but actually need a higher temperature. 

 

Molybdenum wire annealing 

Since the molybdenum wire occurs during the drawing process hardening, stress, in order to eliminate stress and soft molybdenum wire of a certain size to be annealed, is different manufacturers use different annealing process: some first annealing, with secondary annealing. But with the annealing conditions should molybdenum properties and processing conditions vary, annealing may be used once or twice depending on the circumstances of the material, some manufacturers are determined by tensile testing stage annealing point, annealing point temperature and frequency, wherein the second annealing for 2500B, 1000B easy processing of wire has a particularly good effect, and should be highly valued. Annealing of molybdenum in molybdenum than possession an important role in the processing, annealing is good or bad, will directly affect the performance of the drawing, annealing, hardening can not only eliminate, reduce stress wire, there is a row of little miscellaneous, crude Sijia the stiff material, mainly K content is high, then the appropriate annealing increased frequency of once every fire back, you can exclude some K, so that the material weak. 

 

Molybdenum wire drawing process performed directly after the high temperature annealing in a hydrogen furnace is often brittle, causing fluctuations in the elongation, which is due to the wire drawing lubricant molybdenum reacts with graphite to produce molybdenum carbide with such wire very brittle, not durable, in order to prevent this embrittlement, preferably after complete removal of graphite drawing, and then annealed. 

 

In summary, molybdenum processing is the main controlling factor grasp billet temperature and annealing conditions, the actual processing of materials according to the situation and the use of different billet temperature and annealing conditions, molybdenum processing operation will make it extremely well. 

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