The most important thing in the gear production process is to choose good materials. With good materials, we can produce high quality gears. For the choice of materials, there are mainly the following points:
1. Meet the process performance of gear production materials
The process performance of a material refers to the ability of the material itself to adapt to various processing requirements. Gears are manufactured through several processes such as forging, cutting, and heat treatment. Therefore, attention should be paid to the material properties of the materials.
2. Economic requirements of materials
Under the premise of meeting the performance of use, the selection of gear production materials should also pay attention to minimize the total cost of parts. Consider the price of the material itself. The price of carbon steel and cast iron is relatively low, so carbon steel and cast iron are selected under the premise of satisfying the mechanical properties of the parts, which not only has better processing performance, but also can reduce the cost. Consider the cost of the gear production process. First, the cost of processing is different for different heat treatment methods. Secondly, the cost can also be reduced by improving the heat treatment process.
3. Reasonable choice of gear production materials
Satisfying the mechanical properties of the material, the root of the tooth is subjected to large bending stresses, which may cause tooth surface or tooth strength failure. Each point on the tooth surface has a relative sliding, which causes wear. The main failure modes of gears include tooth surface erosion, tooth surface cementing, tooth surface plastic deformation and gear tooth breaking.
Therefore, the gear production material is required to have high bending fatigue strength and contact fatigue strength, the tooth surface should have sufficient hardness and wear resistance, and the core should have certain strength and toughness.