There are many types of shaft materials, and the selection is mainly based on the shaft strength, stiffness, wear resistance and other requirements, as well as the heat treatment method used to achieve these requirements, while taking into account the manufacturing process to be selected, and strive to economic and reasonable.
The common materials for shafts are high-quality carbon steels 35, 45, and 50. The most commonly used steels are 45 and 40Cr steels. For shafts with smaller loads, ordinary carbon steels such as Q235 or Q275 are also commonly used. For the shafts that require greater force, shaft size and weight are limited, and there are certain special requirements, alloy steel can be used, commonly used 40Cr, 40MnB, 40CrNi and so on. The material of the shaft is mainly carbon steel and alloy steel. Most of the steel shaft blanks use rolled steel and forgings, while others use direct round steel.
Ductile cast iron and some high-strength cast irons are easy to cast into complex shapes due to their good casting properties, as well as good vibration damping performance. Low sensitivity to stress concentration, the impact of the fulcrum displacement is small. Therefore, it is often used to manufacture complex-shaped shafts.