Study on Mechanical Properties of 35CrMo4 Steel at High Temperature

The mechanical properties of 35CrMo4 steel at high temperature is a hot research field. Some studies have shown that 35CrMo4 steel has the following characteristics at high temperatures:

1. Decrease in high temperature strength: As the temperature increases, the yield strength and tensile strength of 35CrMo4 steel gradually decrease.

2. Creep behavior: 35CrMo4 steel is prone to creep at high temperature, that is, plastic deformation occurs over time under the action of stress under constant load conditions.

3. Decreased fracture toughness: At high temperature, the fracture toughness of 35CrMo4 steel will be greatly reduced, and brittle fracture will easily occur.

Therefore, in order to ensure the working performance of 35CrMo4 steel at high temperature, it needs to be properly heat treated and reasonably designed. For example, when using 35CrMo4 steel in a high temperature environment, proper preheating and post heat treatment should be adopted to improve its high temperature resistance and maintain its mechanical properties. At the same time, it is necessary to select the appropriate working temperature and stress level in combination with the actual working conditions to avoid overheating and excessive stress of 35CrMo4 steel, which will affect its mechanical properties.