There are more than a hundred types of materials that can be used for mold processing, including metals, plastics, inorganic non-metals, and paraffin. However, depending on the actual needs, the usage and demand of each material vary. Today, we will talk about the 24 most commonly used metal materials in mold processing.

Main features: The most commonly used medium carbon quenched and tempered steel has good comprehensive mechanical properties, low hardenability, and is prone to cracking during water quenching. Small parts should be treated with quenching and tempering, while large parts should be treated with normalizing.

Application example: Mainly used for manufacturing high-strength moving parts, such as turbine impellers, compressor pistons, shafts, gears, racks, and worms. Pay attention to preheating before welding and stress relief annealing after welding.

Main features: high plasticity, toughness, welding performance, certain strength in cold stamping performance, and good cold bending performance.

Application example: Widely used for general requirements of parts and welded structures. Such as tension rods, connecting rods, pins, shafts, screws, nuts, collars, brackets, machine bases, building structures, and bridges that are not subjected to significant force.

Main features: After quenching and tempering treatment, it has good comprehensive mechanical properties, low-temperature impact toughness, and low notch sensitivity. It has good hardenability and can achieve high fatigue strength when oil cooled. Complex shaped parts are prone to cracking when water cooled. Cold bending has moderate plasticity, good machinability after tempering or tempering, but poor weldability and is prone to cracking. It should be preheated to 100-150 ℃ before welding and generally used in a quenched and tempered state. It can also be subjected to carbon nitrogen infiltration and high-frequency surface quenching treatment.

Application example: After quenching and tempering, it is used to manufacture medium speed and medium load parts, such as machine tool gears, shafts, worms, spline shafts, and needle sleeves; After quenching and high-frequency surface quenching, it is used to manufacture parts with high surface hardness and wear resistance, such as gears, shafts, main shafts, crankshafts, mandrels, sleeves, pins, connecting rods, screws and nuts, intake valves, etc; After quenching and medium temperature tempering, it is used to manufacture heavy-duty and medium speed impact parts, such as oil pump rotors, sliders, gears, spindles, and collars; After quenching and low-temperature tempering, it is used to manufacture heavy-duty, low impact, and wear-resistant parts, such as worms, spindles, shafts, and collars; Manufacturing transmission parts with larger dimensions and higher low-temperature impact toughness after carbon nitrogen co infiltration treatment, such as shafts, gears, etc.