Iron Tungsten

Iron tungsten alloy series (tungsten content: 70%-80%) is an alloy composed of tungsten and iron, which is used as an alloy additive in steelmaking. Commonly used ferrotungsten alloys contain 70% tungsten and 80% tungsten.

Iron alloys mainly composed of tungsten and iron. It also contains impurities such as manganese, silicon, carbon, phosphorus, sulfur, copper, and tin, and is an alloying agent for steelmaking. According to the different tungsten content, ferrotungsten is divided into: FeW75 (including W70%～80%, C≤0.20%, P≤0.04%, S≤0.08%, Si≤0.5%, Mn≤0.25%) and FeW80 (including W75.0%～85.0%, C≤0.20%, P≤0.04%, S≤0.08%, Si≤0.7% and Mn≤0.25%).

The ferrotungsten is block, and the block size ranges from 10 to 130mm. The amount of fragments smaller than 10×10mm should not exceed 5% of the total weight of the batch. The maximum allowable size of individual blocks in one direction is 150mm. The surface of the iron tungsten block should be smooth and clean, and there should be no significant non-metallic inclusions and rust spots on the section and surface.

Ferrotungsten is an alloy of tungsten and iron. Ferrotungsten is used as an additive for tungsten in steelmaking and casting, and tungsten is one of the most important alloying elements in the production of special steels. Tungsten can increase the strength limit and yield point of steel, and also improve the hardness and wear resistance of steel while reducing the elongation of steel to a small extent. It is particularly important that tungsten has a good effect on the high temperature mechanical properties of steel, which can improve heat resistance and tempering stability. The most common method of producing ferrotungsten is the "agglomeration method", in which the oxides in the concentrate are reduced with carbon in an electric furnace, and then the solidified metal agglomerates are removed from the furnace.