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The heat treatment of steel shot
2025-07-26
The heat treatment of steel shotrefers to the technological operations of heating, holding, and cooling Steel Shot under strictly controlled temperature conditions to change their internal microstructure, thereby endowing or o
ptimizing their mechanical properties (such as hardness, wear resistance, strength, toughness, etc.). This precise thermal processing is not only a key technology to enhance the service performance of steel shot but also determines their service life and application range in industrial production, being common
ly used in fields such as metal surface treatment, abrasive processing, and foundry cleaning.
The core processes of heat treatment include quenching, tempering, annealing, normalizing, etc., each with unique functional characteristics. Among them, quenching and tempering are often used in combination as a classic process: quenching involves heating the steel shot to a critical temperature above the austenitizing point, maintaining it for a certain period to achieve uniform austenitization, then forming a martensite structure with high hardness in steel shot through rapid cooling in water or oil. While tempering follows quenching, eliminating internal stress generated during quenching through secondary heating to a specific temperature (usually 150-650°C) and holding it, which adjusts toughness and reduces brittleness to achieve an optimal balance between hardness and toughness. This combined process ensures that steel shot can withstand high-intensity impact and friction during use.