Why does knife becomes blunt with use?

1. Metal Fatigue: The metal used in knives, particularly the blade, undergoes metal fatigue over time. As the knife is used for cutting, the metal experiences repeated stress and strain, leading to the development of microscopic cracks. These cracks weaken the blade and make it more prone to blunting.

2. Abrasive Wear: The cutting action of a knife involves friction between the blade and the material being cut. This friction causes tiny particles from both the blade and the material to rub against each other, resulting in abrasive wear. Over time, this wear accumulates and gradually dulls the blade, reducing its sharpness.

3. Misuse and Poor Maintenance: Improper use of a knife, such as cutting hard or abrasive materials, can also accelerate the blunting process. Additionally, lack of proper maintenance, like failing to clean and lubricate the knife regularly, can exacerbate wear and lead to faster blunting.

4. Edge Deformation: With repeated use, the edge of the knife may experience deformation. Factors such as cutting at an incorrect angle or applying excessive pressure can cause the edge to bend or curl, resulting in reduced sharpness.

It's important to note that the rate at which a knife becomes blunt depends on various factors, including the quality of the blade steel, the hardness of the material being cut, and the frequency and manner of use. Proper care and maintenance, such as regular sharpening, can help extend the lifespan of a knife's sharpness and keep it performing at its best.