What is another word for case-hardening?
Pronunciation: [kˈe͡ɪshˈɑːdənɪŋ] (IPA) 
Case-hardening is a term that refers to a process of hardening the surface of metal. It is a commonly used term for creating strength on the surface of metals. Some of the synonyms for case-hardening include surface hardening, hardening, toughening, and strengthening. These similar words are often used interchangeably when discussing metalworking techniques. Surface hardening is a method that creates a strong, durable surface on various materials such as steel, aluminum, and even plastic. Case-hardening refers specifically to the process of hardening the outer layer of steel while leaving the interior softer, making it more resilient. All these synonyms are useful when it comes to the manufacturing and engineering of various products.
