Sleeves are a type of component used to protect equipment. By using sleeves, wear between punches or bearings and the equipment can be significantly reduced, and they also serve as a guiding function. In the field of stamping molds, tungsten steel sleeves are widely used due to their wear resistance and smooth finish, requiring infrequent replacement, thus achieving higher utilization rates for both equipment and personnel.

Hardened alloy bushes, also known as tungsten steel bushes, are primarily used in stamping and stretching applications. Hardened alloys are extensively used as cutting tool materials, such as lathe tools, milling cutters, planning cutters, drills, reamers, etc., for cutting cast iron, non-ferrous metals, plastics, synthetic fibers, graphite, glass, stone, and ordinary steel. They can also be used to cut difficult-to-machine materials like heat-resistant steel, stainless steel, high manganese steel, and tool steel. The cutting speed of the latest hardened alloy cutting tools is hundreds of times that of carbon steel.

Hardened alloy bushes, particularly in terms of tensile applications, mainly involve the stretching of copper and stainless steel components. Due to their high usage frequency, they tend to overheat and wear out the bushes, causing the punch to shift, resulting in dimensional errors and poor product appearance. As oil extraction volumes increase and shallow surface oil diminishes, to ensure oil consumption, there is a gradual shift towards deeper, more inclined wells. However, the difficulty of oil extraction increases, thus requiring components to have good wear resistance, corrosion resistance, or impact resistance.