Pack carburizing is a heat treatment process, particularly applied to low-carbon steels, aiming to enhance the surface hardness and wear resistance of components. In this method, the steel parts are surrounded by a mixture of carbonaceous material, such as charcoal or carbon-rich powders, within a sealed container, known as the “pack.” The pack serves as a source of carbon, which diffuses into the steel when subjected to high temperatures during the carburizing process. This results in a hardened outer layer while maintaining a softer, tougher core.