Sleeves are a type of component that 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, which means they don't need frequent 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, drill bits, boring bars, etc., for cutting cast iron, non-ferrous metals, plastics, synthetic fibers, graphite, glass, stone, and common steel. They can also be used to machine difficult-to-cut materials like heat-resistant steel, stainless steel, high manganese steel, and tool steel. The cutting speed of the new generation of hardened alloy cutting tools is hundreds of times that of carbon steel.

Hardened alloy bushes, particularly copper and stainless steel components in tensile applications, are prone to overheating due to high usage frequency, which can lead to bush wear and misalignment of the punch needles, resulting in dimensional errors and poor product appearance. With the increase in oil extraction, the shallower oil reserves are diminishing, prompting a shift towards deeper, highly inclined wells to maintain oil output. However, the difficulty in extracting oil is rising, thus necessitating parts with excellent wear resistance, corrosion resistance, or impact resistance.