cementite

Cementite, also known as iron carbide (Fe₃C), is a hard compound that forms in steel and cast iron during certain manufacturing processes. It appears as small, very hard particles within the metal's structure, making the material tougher and more resistant to wear. Cementite influences the strength and hardness of steel, especially in tools and machinery. Its presence can also affect how the metal responds to heat treatment. Overall, cementite plays a crucial role in defining the mechanical properties of steel and iron alloys, balancing hardness with durability.