1) Metal heat treatment
Found on
https://www.crosswordclues.com/clue/nitriding
Nitriding is a heat treating process that diffuses nitrogen into the surface of a metal to create a case hardened surface. These processes are most commonly used on low-carbon, low-alloy steels, however they are also used on medium and high-carbon steels, titanium, aluminum and molybdenum. Typical applications include gears, crankshafts, camshafts...
Found on
http://en.wikipedia.org/wiki/Nitriding
(from the article `nitride`) ...vanadium, silicon, titanium, and tantalum are very refractory, resistant to chemical attack, and hard—and thus are useful as abrasives and in ... Another method of surface hardening, called nitriding, utilizes nitrogen and heat. Cam shafts, fuel injection pumps, and valve stems are typically ... N...
Found on
http://www.britannica.com/eb/a-z/n/44
Introducing nitrogen into the surface layer of a solid ferrous alloy by holding at a suitable temperature (below Ac1 for ferritic steels) in contact with a nitrogenous material, usually ammonia or molten cyanide of appropriate composition. Quenching is not required to produce a hard case.
Found on
http://www.encyclo.co.uk/local/20742
A process of case-hardening steels of appropriate composition with nitrogen to give superior results to case hardening with heat alone.
Found on
http://www.metalbulletin.com/Glossary.html
Introducing nitrogen into a solid ferrous alloy by holding at a suitable temperature (below Ac1 for ferritic steels) in contact with a nitrogenous material, usually ammonia of molten cyanide of appropriate composition. Quenching is not required to produce a hard case.
Found on
https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/
Process of surface hardening certain types of steel by heating in ammonia gas at about 935-1000 (degrees) F., the increase in hardness being the result of surface nitride formation. Certain alloying constituents, principal among them being aluminum, greatly facilitate the hardening reaction. In general, the depth of the case is less than with carbu...
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https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/
The diffusion of nitrogen into alloy steel to form hard nitrides in the surface layer (typically 250µ). Performed at between 500 and 750oC from a gas, salt bath or plasma glow discharge.
Found on
https://www.encyclo.co.uk/local/20828
Gas nitriding is a case-hardening process whereby nitrogen is introduced into the surface of a solid ferrous alloy by holding the metal at a suitable temperature and in contact with a nitrogenous gas, usually ammonia. Nitrogen released by the decomposition of ammonia reacts with the metal to make iron nitride, a hardening substance. Process methods...
Found on
https://www.encyclo.co.uk/local/22323
a process of casehardening in which nitrogen is introduced into the metal by keeping it at a suitable temperature in the presence of a nitrogen source.
Found on
https://www.infoplease.com/dictionary/nitriding
A surface hardening process involving heating in an atmosphere of ammonia, or in contact with a nitrogen-bearing material, so as to promote the absorption of nitrogen.
Found on
https://www.metaltek.com/resources/glossary/
Introducing nitrogen into a solid ferrous alloy by holding at a suitable temperature
Found on
https://www.unifiedalloys.com/resources/glossary/
No exact match found.
