Bearing Heat Treatment Method in Foreign Machinery Industry
Heat treatment is an important process in the production of bearings, and it is an effective manufacturing process to ensure bearing machining accuracy and performance. In order to improve the crack resistance and fatigue life of bearings, and to make them have higher load capacity, a series of heat treatment processes such as case hardening and quenching are usually required. The bearing heat treatment technology abroad is relatively mature. This article will introduce the bearing heat treatment technology abroad.
First of all, in terms of surface heat treatment, the foreign bearing heat treatment technology uses very advanced temperature control technology, using temperature control technology to control the heating speed and temperature during heat treatment according to the characteristics of the material to be heated. At the same time, high-precision built-in sensors monitor the heat treatment process of the bearings in real time. Compared with traditional bearing heat treatment,its surface heat treatment structures have the characteristics of high efficiency, good process repeatability, and excellent grade.
In terms of bearing quenching, the main purpose of bearing quenching is to increase the hardness and strength of the bearing, while ensuring the toughness materials. Compared with domestic heat treatment technology, the heat treatment process of foreign bearings adopts multi-stage quenching process. This makes the quenching process more controllable, and the quenching hardness can be more uniform. In addition, in order to improve the bearing performance and life, surface quenching and nitriding are often used together. The surface quenching makes the bearing surface hardness reach HRC51-54, which is helpful for nitriding and achieving high surface hardness when nitrided. The bearing processing quality is better, and the service life is also significantly improved.
Finally, regarding the choice of bearing quenching medium, the foreign bearing heat treatment technology often adopts oil furnace instead of traditional quenching medium such as water and brine. Oil quenching does not cause local overheating, and the deformation of the bearing is relatively small. At the same time, oil quenching has the advantages of low quenching temperature, excellent uniformity, no thermal shock and no scale production. This effectively ensures the excellent performance of the bearing after heat treatment.
In summary, foreign bearing heat treatment technology has a very mature surface heat treatment technology,it has more advanced quenching process, temperature control and other aspects, and quenching medium selection is also paying more and more attention to safety and environmental protection. Compared with domestic bearing heat treatment, the performance and load capacity of bearings have been greatly improved, making great contributions to bearing performance, high efficiency and cost reduction.
