Metallurgical Product Description

Ferrotungsten is an iron alloy series (tungsten content: 70%-80%). It is an alloy composed of tungsten and iron and is used as an alloy additive for steelmaking. Commonly used ferrotungsten contains 70% and 80% tungsten.

Ferrotungsten is produced from tungsten manganese ore by reducing it with carbon in an electric furnace. Mainly used as an alloying element additive for tungsten-containing alloy steel (such as high-speed steel). There are three varieties of ferrotungsten produced in my country: W701, W702, and W65, which contain about 65% to 70% tungsten. Due to its high melting point, it cannot flow out in liquid form, so it is produced by the agglomeration method or the iron extraction method.

Product Parameters

Product Advantages

High density, high weight.

high melting point.

good mechanical properties.

Corrosion resistance.

Electronic and electrical applications.

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Tungsten is a silver-gray metal. The atomic weight is 183.85. Electronic structure 4f145d46s2. Density (20℃) 19.3g/cm3. Melting point 3400℃. Boiling point 5555℃. Tungsten forms a solid solution with iron and two intermetallic compounds Fe2W and Fe3W2 or Fe7W6, but they are unstable at high temperatures. The melting temperature of ferrotungsten containing 75% to 85% W is higher than 2500°C, so it cannot be discharged from the furnace and can only be produced by the block method or the iron extraction method. The density of industrial ferrotungsten is about 15.3g/cm.

An iron alloy whose main components are tungsten and iron. It also contains manganese, silicon, carbon, phosphorus, sulfur, copper, tin, and other impurities, and is an alloying agent used in steelmaking. According to the different tungsten content, 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%).

Ferrotungsten is delivered in blocks with a block size ranging from 10 to 130mm, less than 10×10mm. The amount of broken pieces should not exceed 5% of the total weight of the batch. The maximum size of individual blocks allowed in one direction is 150mm. The surface of the tungsten iron block should be smooth and clean, with no obvious non-metallic inclusions and rust spots on the cross-section and surface.