How does bearing steel processing improve its hardness through heat treatment process to meet the needs of high-load operation?
Publish Time: 2024-12-31
Bearing steel processing is an important material in the machinery manufacturing industry, and its performance is directly related to the operating efficiency and life of mechanical equipment. Especially in high-load operating environments, the hardness of bearing steel processing has become a key indicator to measure its quality.
The heat treatment process improves the physical and mechanical properties of bearing steel by changing its internal organizational structure. In the process of bearing steel processing, commonly used heat treatment processes include quenching, tempering and quenching and tempering.
Quenching is the process of heating bearing steel processing above a critical point and then cooling it rapidly. This process can refine the grains of bearing steel processing and significantly increase the hardness, but the toughness will be reduced. The structure of bearing steel processing after quenching is mainly composed of martensite. This structure has excellent hardness and wear resistance and is the basis for meeting high-load operation requirements.
However, bearing steel processing after quenching often has problems such as high brittleness and easy cracking. Therefore, tempering is required. Tempering is the process of heating the quenched bearing steel processing to a certain temperature, then keeping it warm for a period of time and then cooling it. Through tempering, the residual stress in bearing steel processing can be released, the brittleness is reduced, and the toughness is improved. At the same time, tempering can also adjust the hardness of bearing steel processing within a certain range to meet the needs of different working conditions.
Quenching and tempering treatment is a combined process of quenching and high-temperature tempering. It enables bearing steel processing to obtain a tempered sorbite structure, which has excellent comprehensive mechanical properties, including hardness, toughness, strength and fatigue resistance. Therefore, quenching and tempering treatment is one of the commonly used heat treatment processes in bearing steel processingdgshydzk.com.
In addition to the above heat treatment processes, surface heat treatment technologies such as carburizing, nitriding or carbonitriding can also be used during bearing steel processing. These technologies can further improve the hardness and wear resistance of the bearing steel processing surface, while reducing the transition temperature of the surface layer and forming surface compressive stress, thus improving the fatigue resistance and rolling contact fatigue performance of the bearing.
In summary, bearing steel processing can significantly improve its hardness through reasonable heat treatment during processing to meet the needs of high-load operation. At the same time, these heat treatment processes can also optimize the internal organizational structure of bearing steel processing, improve its comprehensive mechanical properties, and provide a strong guarantee for the normal operation of mechanical equipment.
