The crosshair within the differential is a key component for transferring torque and motion. Shaft parts are a kind of structural parts with large consumption and occupy a rather important position. The main function of shaft parts is to support transmission parts and transfer dynamic and dynamic, they work under the action of a variety of stresses, the material should have higher comprehensive mechanical properties, require a certain degree of hardness, in order to improve its ability to resist wear.

The choice of the material of the parts as far as possible do not choose precious metal materials, considering the parts in the process of work under constant alternating load, so choose forging, so that the metal fiber is not cut off as far as possible, to ensure the reliable work of the parts. The material of the cross shaft is 20CrMnTi, which is a low carbon alloy structural steel. It is a common material that fully meets the mechanical properties of the cross shaft and is economical in price. The material selection is appropriate.

Including the choice of blank, differential cross shaft material selection, according to the requirements of parts should have a certain strength and abrasion resistance, often choose 20 crmnti and generally low carbon alloy structure (carburized materials), and considering the nature of the production for the large number of large, after carburizing and quenching surface with high hardness and the axis part keep considerable strength and toughness, and high mechanical properties, so use efficiency and precision are high grade of die forging forming process.