Ultra cold treatment process and properties of tools and dies (1) After quenching and tempering, the ultra cold treatment process tools and dies are cooled to – 160 ~ – 180 ℃ and cold holding time Tmin = k * D. the empirical formula D is the effective diameter or thickness of workpiece mm *… Read more Ultra cold treatment process and properties of tools and dies
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Cold treatment of bearing rings
After the workpiece is quenched and cooled to room temperature, it is immediately placed in an environment lower than room temperature for a certain period of time, and taken out and placed in room temperature. This treatment lower than room temperature is called cold treatment. Industrial freezers are often used for bearing steel cold treatment.… Read more Cold treatment of bearing rings