Bearings are important parts in mechanical equipment, which need to have high hardness and wear resistance to ensure the normal operation and service life of the equipment. Quenching and tempering are the key heat treatment processes in the process of bearing manufacturing, which have an important impact on the performance and service life of bearings. This paper will introduce the process control of bearing quenching and tempering.
Bearing hardening process control
Heating temperature and time control: quenching heating temperature and time need to be determined according to the bearing material and technical requirements. Excessive heating temperature will lead to overheating of the material and coarse grain, which will affect the property of the material. However, too low heating temperature will make the material can not be completely austenitic, affecting the quenching effect. At the same time, the heating time also needs to be determined according to the thickness of the material and the heating equipment to ensure uniform heating of the material.
Cooling speed and mode control: quenching cooling speed and mode have an important impact on the hardness and structure of the bearing. Generally, oil quenching, water quenching or gas quenching is used for cooling, and the appropriate cooling method and speed need to be selected according to the bearing material and size to ensure the hardness and organizational uniformity of the bearing.
Bearing tempering process control
Tempering temperature and time control: tempering temperature and time need to be determined according to the bearing material and technical requirements. Too high tempering temperature will cause the hardness of the material to decrease and affect the wear resistance of the bearing; However, too low tempering temperature can not eliminate the quenching stress and affect the dimensional stability of the bearing. At the same time, the tempering time also needs to be determined according to the thickness of the material and the tempering equipment to ensure the uniform tempering of the material.
Tempering method and atmosphere control: tempering method and atmosphere have an important impact on the tempering effect and organization of bearings. Generally, tempering in the furnace or vacuum tempering and other methods are used for tempering, and the appropriate tempering method and atmosphere need to be selected according to the bearing materials and technical requirements to ensure the tempering effect and organizational uniformity of the bearing.
In order to improve the process effect and quality control level of bearing quenching and tempering, it is necessary to optimize the process parameters and quality control. Specific measures include: the use of advanced heating equipment and control technology to improve heating efficiency and uniformity; Strengthen the control of cooling speed and mode to ensure the uniformity of bearing hardness and organization; Using advanced tempering equipment and control technology to improve tempering effect and organizational stability; Strengthen material quality control and cleaning effect inspection to ensure the quality of raw materials and processing cleanliness of bearings.
In short, the process control of bearing quenching and tempering is an important part of the bearing manufacturing process, and it is necessary to strictly control process parameters and strengthen quality control to improve the performance and service life of bearings.
