1, low carbon steel plastic, but low strength and hardness, welding and cold stamping process is very good, can be used to make a variety of standard parts, shaft sleeve, containers, etc.;

2, high carbon steel plastic poor, high hardness, poor fatigue strength, poor cutting, do shaft parts toughness is not enough, easy to break. This kind of steel is suitable for the production of static pressure type, wear-resistant parts, such as heavy rail, roll. After appropriate heat treatment can also be produced spring, wire rope and other high hardness, high wear resistance parts;

3. The main function of the automobile drive shaft is to support the rotary body and transfer power. Generally, the working conditions will bear alternating torque and tension and compression load, and the shaft neck and key parts will bear greater friction and wear. Failure mode is mainly fracture and local excessive wear, including fatigue fracture and overload fracture. Therefore, material selection should have: enough strength, stiffness and a certain degree of toughness, good wear resistance, high fatigue strength and good cutting. The spindle is required to have good comprehensive mechanical properties.

4, and medium carbon steel after appropriate heat treatment can obtain good comprehensive mechanical properties, to the heart of the tough, surface wear parts.