Training Online Engineering In case hardening, you change the surface of the metal chemically by introducing a high carbide or nitride content. Engineering Calculators … Hardening steel is used for gear axle, bevel gear, plugs, automotive transmission, automotive engine controls etc. Engineering Forum Automatic equipment produces uniform results and is more desirable. Tempering is generally employed for a partial stress relief and improves resistance to cracking from grinding operations. +39 0341 26 74 11 - info@itlabonaiti.com When the carburized steel is heat-treated, the case becomes hardened and the core remains soft and tough. The temperature range from 200°F down to room temperature is called the “cracking range” and you do not want the steel to pass through it. - This case-hardening method produces the hardest surface of any of the hardening processes. }, Engineering Materials NITRIDING. - This process is a type of case hardening that is fast and efficient. © Copyright Integrated Publishing, Inc. All Rights Reserved. The torch consists of a mixing head, straight extension tube, 90-degree extension head, an adjustable yoke, and a water-cooled tip. The steels best suited for case hardening are the low-carbon and low-alloy series. { Excel App. Home - Carburizing is a case-hardening process by which carbon is added to the surface of low-carbon steel. This type of steel is often hardened in order to increase the outstanding hardness and to ensure core malleability. Case hardening is ideal for parts that require a wear-resistant surface and must be tough enough internally to withstand heavy loading. Company data | Terms and conditions | CARBURIZING. } In both cases, the parts become annealed during the slow cooling. The principal forms of casehardening are carburizing, cyaniding, and nitriding. It differs from the other methods in that the individual parts have been heat-treated and tempered before nitriding.