High carbon chromium bearing steel rolling bearing parts heat treatment technology
High carbon chromium bearing steel is widely used in the manufacture of various rolling bearing parts because of its good wear resistance, hardness, strength and good machining properties. Rolling bearing parts heat treatment technology is also very important aspects in the production process. In this paper, the heat treatment technology of high carbon chromium bearing steel rolling bearing components is studied.
High carbon chromium bearing steel rolling bearing components are usually quenched and tempered to improve their performance. Before quenching and tempering, the hardenability of the steel must be improved to the required depth. Therefore, to ensure the necessary heat treatment effect, it is very important to correctly select the thermal properties of high carbon chromium bearing steel. Generally speaking, the steel with proper hardenability can reach higher mechanical properties after heat treatment.
The heat treatment process of high carbon chromium bearing steel rolling bearing components includes pre-treatment and quenching and tempering. In order to prepare for quenching and tempering, proper pre-treatment process must be used. In pre-treatment, the process parameters can be determined according to the material of the workpiece and its desired performance. Generally, the pre-treatment process of high carbon chromium bearing steel rolling bearing components includes normalizing, tempering and cold tempering.
Normalizing is a heat treatment process in which steel is heated to the austenitizing temperature and kept at the temperature for a certain period of time and then cooled in the air. The main purpose of normalizing is to homogenize the microstructure of the steel, obtain dense and full grain structure, and improve the mechanical properties of the steel. After normalizing, the hardness and strength of high carbon chromium bearing steel rolling bearing components can be improved.
Tempering is also a kind of heat treatment process of high carbon chromium bearing steel rolling bearing components, and its purpose is to reduce the hardness of the steel while improving its toughness and ductility. The tempering temperature can be determined according to the desired performance of the bearing components.
Cold tempering is the process of tempering the steel at a very low temperature. Its main purpose is to increase the hardness of the steel while maintaining a relatively low temperature. This can improve its wear resistance and fatigue strength.
After pre-treatment, the high carbon chromium bearing steel rolling bearing components can be quenched and tempered to further improve their performance. Quenching and tempering is a kind of heat treatment process in which the steel is quenched from the austenitizing temperature to the specified temperature and then tempered. The main purpose of quenching and tempering is to reduce the hardness, strength and brittleness of the steel, improve its plasticity and toughness, and ensure that its performance meets the requirements.
High carbon chromium bearing steel rolling bearing components heat treatment technology due to its good wear resistance, hardness and strength and good machinability, widely used in all kinds of rolling bearing components production, heat treatment is an important part of the production process. In this paper, the heat treatment technology of high carbon chromium bearing steel rolling bearing components is summarized, which involves pre-treatment and quenching and tempering process. The correct selection of this kind of heat treatment process can be effective to improve the performance of high carbon chromium bearing steel rolling bearing components and ensure the production requirements.
