Ferro-tungsten is smelted in electric furnaces and is produced by agglomeration or iron extraction method because of its high melting point and inability to be released in liquid form.
Classification
Tungsten and iron as the main composition of the iron alloy. It also contains manganese, silicon, carbon, phosphorus, sulfur, copper, tin and other impurities, is an alloying agent for steelmaking. According to the different amount of tungsten, ferrotungsten is divided into: FeW75 (containing W70% ~ 80%, C ≤ 0.20%, P ≤ 0.04%, S ≤ 0.08%, Si ≤ 0.5%, Mn ≤ 0.25%) and FeW80 (containing W75.0% ~ 85.0%, C ≤ 0.20%, P ≤ O.04%, S ≤ 0.08%, Si ≤ 0.7% and Mn ≤ 0.25%). 0.25%).
Ferro-tungsten is delivered in lumps, the lump size ranges from 10 to 130mm, the amount of broken lumps less than 10×10mm should not be more than 5% of the total weight of the batch, and the maximum size of individual lumps in one direction is allowed to be 150mm. the surface of ferro-tungsten lumps should be smooth and clean, and the section and surface should be free of significant non-metallic inclusions and rust spots.
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