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Views: 0 Author: Site Editor Publish Time: 2025-08-11 Origin: Site
2. Normalizing
Selection Guidelines Based on Carbon Content:
3. Quenching
Current frequency: 50 Hz
Hardened layer depth: 10–15 mm
Applications: Workpieces requiring very deep hardened layers.
Current frequency: 2500–8000 Hz
Hardened layer depth: 2–10 mm
Applications: Larger shafts and large to medium modulus gears.
Current frequency: 250–300 kHz
Hardened layer depth: 0.5–2.0 mm
Applications: Small and medium modulus gears, and small to medium-sized shafts.
Classification by Temperature:
Water: Economical with strong cooling capacity, suitable for carbon steels.
Saltwater (aqueous solution of salt or alkali): Offers stronger high-temperature cooling capacity than water, also used for carbon steels.
Oil: Reduces the risk of deformation and cracking effectively. Types include spindle oil, machine oil, and diesel oil, suitable for alloy steels.
Note: Quenching followed by high-temperature tempering is called "tempering and quenching" (or "modulating"), which imparts well-balanced properties to steel and is widely used.
