This application is a thermochemical process in which the workpieces to be treated are heated and exposed to a nitrogen-containing gas or a mixture of carbon-producing gas and ammonia during both the heating time and the treatment. In nitriding, nitrogen diffuses into the steel and forms hard, wearresistant nitrides. Gas nitriding is a surface hardening process, where nitrogen is added to the surface of steel parts using dissociated ammonia as the source. Gas nitriding. Interest in solution gas nitriding and diffusion of nitrogen into the surface of titanium alloys as a means to inhibit adhesive wear (galling) while replacing heavier steel machinery parts has been increasing in applications involving moving components. The purpose of nitriding is to increase the surface hardness of the steel and improve its wearing properties. In gas nitriding, the workpiece is treated in a stream of ammonia gas between 480 and 550 °C. Process details. For optimum results, the material should be in a hardened and tempered condition prior to gas nitriding. The results of industrial applications of nitriding, developed by the Institute of Precision Mechanics are given. This technology utilized a combination of vacuum, voltage, temperature and gas flow controllers that precisely control the final Nitriding phase. UltraGlow® Gas Nitriding is a case-hardening process whereby nitrogen is diffused into the surface of a solid ferrous alloy by holding the metal at a suitable temperature in contact with a nitrogenous gas, usually ammonia. Using ammonia gas, the gas nitriding process is a low-cost and environmentally sound technology.However, the types of steels to which this process is applicable are limited. Plasma nitriding allows faster nitriding times, and the quickly attained surface saturation of the plasma process results in … The proprietary ZeroFlow® control technology uses only ammonia as a process gas thereby reducing gas usage and gas emissions. Gas nitriding develops a very hard case in a component at relatively low temperature, without the need for quenching. Plasma nitriding. SECO/VACUUM offers gas nitriding furnaces in a variety of styles and models. Gas nitriding is only applied, as a rule, for alloyed steels. Manufacturers often utilize highly cost-effective materials to complete this type of hardening treatment. Gas Nitriding Process. Salt Bath Nitriding Process However, times for gas nitriding can be quire long, that is, from 10 to 130 h depending on the application, and the case depths are relatively shallow, usually less than 0.5 mm. Today, numerous applications exist for … The article presents modern applications of gas nitriding and its derivative processes. In the 1980’s the first commercial application of the Ion Nitriding process was introduced into the United States. The Gas Nitriding Process. Batch Gas-Nitriding Vacuum Furnaces . Gas nitriding of sintered steels with low density is not recommended. GAS NITRIDING: Materials And Applications. Gas nitriding has become an important finishing step in the production of some metal parts. This treatment takes place in a medium (gas or salt) which gives off nitrogen. Ion Nitriding. Gas nitriding. Commonly, the definition of term ‘nitriding’ is synonym to gas-nitriding of nitriding (alloy) steels (also called nitralloys), i.e., it is understood as the enrichment of solid steel surface with nitrogen by heating it in an atmosphere of NH 3 gas at a temperature normally in the range of 500-575°C for a prolonged period of 48 to 96 hours, depending upon the case-depth desired. 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