The heat treatment process for 35NiCrMo6 KB steel grade typically involves the following steps:
1. Annealing: Heating the steel to a specific temperature and holding it at that temperature for a period of time, followed by slow cooling to relieve internal stresses and improve machinability.
2. Normalizing: Heating the steel to a specific temperature and then cooling it in still air to refine the grain structure and improve the mechanical properties.
3. Hardening: Heating the steel to a high temperature and then rapidly cooling it, typically in oil or water, to achieve a high surface hardness.
The chemical composition of 35NiCrMo6 KB steel grade typically includes the following elements:
– Carbon (C): 0.32-0.39%
– Silicon (Si): 0.15-0.40%
– Manganese (Mn): 0.60-0.90%
– Phosphorus (P): <0.025%
– Sulfur (S): <0.020%
– Chromium (Cr): 1.50-1.80%
– Nickel (Ni): 1.50-1.80%
– Molybdenum (Mo): 0.25-0.35%
These chemical elements contribute to the steel’s strength, toughness, and hardenability, making it suitable for high-stress applications.
In summary, the heat treatment process and chemical composition of 35NiCrMo6 KB steel grade play a crucial role in its mechanical properties, making it a popular choice for various industrial applications.
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