Definition

    Tool steels are a variety of carbon and alloy steels that are particularly suitable for making tools. Their suitability stems from their unique hardness, wear resistance and resistance to deformation, as well as their ability to retain a cutting edge at high temperatures. Therefore, tool steels are suitable for forming other materials.

Categories
    Depending on their chemical composition, tool steels are often classified into three main categories: carbon tool steels, alloy tool steels, and high-speed steels (essentially high-alloy tool steels). According to the use of steel, it can be divided into three categories: tool steel, die steel, gauge steel.

Heat treatment process

    The service life of tool steel is closely related to the quality of its heat treatment. The heat treatment of tool steel is characterized by preheating mostly spheroidal annealing to obtain a uniform and moderate spheroidal organization, and final heat treatment is quenching and low-temperature tempering (quenching and tempering at 560°C three times for high-speed steel) to obtain a high hardness organization with uniform fine carbides distributed on the tempered martensite matrix to ensure the wear resistance of the tool. The heat treatment of hot forging die steel is different, with a pre-treatment of annealing and a final heat treatment of quenching and tempering at medium or high temperatures to obtain good overall mechanical properties.

Tool steel plate - Tool Steel refers to a variety of carbon and alloy steels that are particularly well-suited to be made into tools. Their suitability comes from their distinctive hardness, resistance to abrasion, their ability to hold a cutting edge, and/or their resistance to deformation at elevated temperatures (red-hardness). 

Tool steel can be used for special applications like injection molding because the resistance to abrasion is an important criterion for a mold that will be used to produce hundreds of thousands of parts.  The AISI-SAE grades of tool steel is the most common scale used to identify various grades of tool steel.

Tool steel is used in a variety of different industries and applications, including: cutting, forming, shearing and stamping of metals and plastics; extrusion of plastic parts, such as pipes and vinyl window frames; and mold making where metal powders are pressed into shapes such as gears.

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