
1) Metal heat treatment
Found on
https://www.crosswordclues.com/clue/carburizing

Carburizing or carburising (chiefly British English) is a heat treatment process in which iron or steel absorbs carbon liberated when the metal is heated in the presence of a carbon bearing material, such as charcoal or carbon monoxide, with the intent of making the metal harder. Depending on the amount of time and temperature, the affected area c...
Found on
http://en.wikipedia.org/wiki/Carburizing

• (p. pr. & vb. n.) of Carburize
Found on
http://thinkexist.com/dictionary/meaning/carburizing/

form of surface hardening (q.v.) in which the carbon content of the surface of a steel object is increased.[5 related articles]
Found on
http://www.britannica.com/eb/a-z/c/23

the process by which the surface carbon concentration of a ferrous alloy is increased by diffusion from the surrounding environment.
Found on
http://www.chemicalglossary.net/definition/314-Carburizing

the process by which the surface carbon concentration of a ferrous alloy is increased by diffusion from the surrounding environment.
Found on
http://www.encyclo.co.uk/local/20089

The absorption of carbon atoms by a metal at high temperatures; it may remain dissolved, or form metal carbides; Absorption and diffusion of carbon into solid ferrous alloys by heating, to a temperature usually above Ac in contact with a suitable carbonaceous material. A form of case hardening that produces a carbon gradient extending inward from t...
Found on
http://www.encyclo.co.uk/local/20742

The absorption of carbon atoms by a metal at high temperatures; it may remain dissolved, or form metal carbides; Absorption and diffusion of carbon into solid ferrous alloys by heating, to a temperature usually above Ac in contact with a suitable carbonaceous material. A form of case hardening that produces a carbon gradient extending inward from t...
Found on
http://www.encyclo.co.uk/local/21115

A process in which an austenitized ferrous material is brought into contact with a carbonaceous atmosphere having sufficient carbon potential to cause absorption of carbon at the surface and, by diffusion, create a concentration gradient.
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https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/

Adding carbon to the surface of iron-base alloys by absorption through heating the metal at a temperature below its melting point in contact with carbonaceous solids, liquids or gases. The oldest method of case hardening.
Found on
https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/

Introducing carbon into a solid ferrous alloy by holding above Ac1 in contact with a suitable carbonaceous material, which may be a solid, liquid, or gas. The carburized alloy is usually quench hardened.
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https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/

The oldest method of case hardening in which carbon is added to the surface of iron-base alloys by absorption through heating the metal at a temperature below its melting point, in contact with carbonaceous solids, liquids or gases.
Found on
https://www.countryknives.com/knife-knowledge/steel-glossary/

Introducing carbon into a solid ferrous alloy by holding above Ac, in contact with a suitablecarbonaceous material, which may be a solid, liquid or gas. The carburized alloy is usually quench hardened. See also: Direct Quenching.
Found on
https://www.encyclo.co.uk/local/20687

A form of case hardening that produces a carbon gradient inward from the surface, enabling the surface layer to be hardened by either quenching directly from the carbonizing temperature or by cooling to room temperature, then reaustenitizing and quenching.
Found on
https://www.metaltek.com/resources/glossary/

Adding carbon to the surface of iron-base alloys by absorption through heating the metal at a temperature below its melting point in contact with carbonaceous solids, liquids or gases. The oldest method of case hardening.
Found on
https://www.unifiedalloys.com/resources/glossary/

A process in which an austenitized ferrous material is brought into contact with a carbonaceous atmosphere having sufficient carbon potential to cause absorption of carbon at the surface and, by diffusion, create a concentration gradient.
Found on
https://www.unifiedalloys.com/resources/glossary/
No exact match found.