Tool steels are produced in a variety of ways. One major way is to use an electric stove. The recycled scrap and alloy components are melted in an electric arc furnace to realize an electric arc furnace. To prevent oxidation reactions, mix the molten mixture and chemicals together in a large steel drum. During the refining process, after impurities are removed, the steel flows into large molds and is made into ingots.
An alternative to EAF is electroslag refining (ESR). With this method, a progressive melting technique is used to create an ingot with a smooth surface and no tubes (holes) or voids (defects). This produces high-grade steel with virtually no defects. Other common steps in tool steel manufacturing include:
Annealing: Heating steel to a specific temperature and continuing to cool it over a period of time. This process changes the molecular structure of the steel, making it less brittle, making it easier to handle.
Hot or Cold Drawing: The drawing process is used on tool steels to achieve higher tolerances, smaller sizes, or unique shapes. Due to the high strength and limited ductility of tool steel, multiple passes or warm drawing at temperatures up to 540 °C are required. Cold drawing is usually limited to a single light pass to prevent breakage of the stock.
