Views: 0 Author: Site Editor Publish Time: 2025-03-21 Origin: Site
Annealing No.1: Anneal at 760 ± 10°C, then cool in the furnace until the temperature reaches 400°C and then air-cool. The hardness is HB220 - 230.
Normalizing No.4: Normalize at 860 ± 10°C, then take it out of the furnace and air-cool.
Quenching + Tempering No.5: Quench in water or oil at 840 ± 10°C (depending on the complexity of the product shape), and then temper at 680 - 700°C. The hardness is HB < 217.
Quenching + Tempering No.6: Quench in oil at 840 ± 10°C, and then temper at 470°C. The hardness is HRC41 - 45.
Quenching + Tempering No.7: Quench in oil at 840 ± 10°C, and then temper at 480°C. The hardness is HRC35 - 45.
Quenching + Tempering No.8: Quench in oil at 850°C, and then temper at 510°C. The hardness is HRC38 - 42.
Quenching + Tempering No.9: Quench in oil at 850°C, and then temper at 500°C. The hardness is HRC40 - 43.
Quenching + Tempering No.10: Quench in oil at 850°C, and then temper at 510°C. The hardness is HRC36 - 42.
Quenching + Tempering No.11: Quench in oil at 850°C, and then temper at 560°C. The hardness is HRC32 - 36.
Quenching + Tempering No.12: Quench in oil at 860°C, and then temper at 390°C. The hardness is HRC48 - 52.
