Bearing heat treatment process

Whether heat treating primary or secondary steel, monitoring and controlling temperature is essential for the product's quality, process effectiveness, productivity, and yield. Through-process temperature monitoring in such heavy steel processing applications is not, as you might assume, the simplest of tasks, but Tempsens has created a variety of innovative, one-of-a-kind application-specific technical solutions using years of experience in such sectors. Many customers throughout the world rely on such robust, secure, and dependable solutions to confidently comprehend, regulate, enhance, and validate their steel heat treatment processes.

Bearing heat treatment is a process used to improve the properties of bearings. It involves several steps:

  1. Annealing: The bearing components are heated and slowly cooled to relieve stress and make them easier to work with.
  2. Quenching: The components are heated to a high temperature and quickly cooled in a special liquid. This makes the material harder and more resistant to wear.
  3. Tempering: The components are heated again to a lower temperature and held there for a while. This reduces brittleness and makes the material tougher and more flexible.
  4. Optional Induction Hardening: Certain parts of the bearing can undergo a localized heat treatment using induction heating. This hardens specific surfaces while maintaining desired properties elsewhere.
  5. Surface Treatment: Additional treatments like nitriding or coating may be applied to improve performance, prevent corrosion, or reduce friction.


The standard range of evaporative thermal barriers are designed for use up to a maximum operating temperature of 1000°C. Please contact us for details of solutions for higher temperatures.

  • Slab reheat, billet reheat process.
  • High temperature and duration heat treatment processes without quenching can be achieved.
  • Bearing heat Treatment process.
  • The temperature within the furnace rises continuously over time throughout the heating phase until it reaches 800°C to 1000°C. The temperature curve, however, can show that some parts of the furnace are hotter or cooler than others, requiring adjustments to ensure that the furnace's temperature is uniform. In a similar manner, the temperature is held at 850°C for the required 2 hours during the holding phase to guarantee that the bearings are heated evenly and consistently. The temperature of the bearings rapidly declines when they are quenched in either a salt or oil bath during the quenching step, ensuring that they cool fast and uniformly and tempered to increase ductility.