cyanide hardening


cyanide hardening
a process of introducing carbon and nitrogen into the surface of steel by heating it to a suitable temperature in a molten bath of sodium cyanide, or a mixture of sodium and potassium cyanide, diluted with sodium carbonate and quenching in oil or water. This process is used where a thin case and high hardness are required.

Mechanics glossary. 2013.

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  • cyanide hardening — /ˈsaɪənaɪd ˌhadənɪŋ/ (say suyuhnuyd .hahduhning) noun the introduction of carbon and nitrogen into the surface of steel by heating it in contact with molten cyanides; a form of case hardening …   Australian English dictionary

  • hardening — increasing the hardness of steel by heat treatment. This normally implies heating the steel to a required temperature and quenching in a suitable medium, e.g., oil or water. age hardening case hardening cyanide hardening flame hardening induction …   Mechanics glossary

  • cyanide — /suy euh nuyd , nid/, n., v., cyanided, cyaniding. n. 1. Also, cyanid /suy euh nid/. Chem. a. a salt of hydrocyanic acid, as potassium cyanide, KCN. b. a nitrile, as methyl cyanide, C2H3N. v.t. 2. to treat with a cyanide, as an ore in order to… …   Universalium

  • cyanide poisoning —       harmful effects of inhaling hydrogen cyanide or of ingesting the salts of hydrogen cyanide, called cyanides. Hydrogen cyanide, also known as hydrocyanic acid, or Hcn, is a highly volatile liquid used to prepare acrylonitrile, which is used… …   Universalium

  • cyanide process — noun a) A method of extracting gold and silver from their ores with a solution of sodium cyanide b) A process of case hardening iron or steel by immersing it in molten cyanide and then …   Wiktionary

  • Case hardening — or surface hardening is the process of hardening the surface of a metal, often a low carbon steel, by infusing elements into the material s surface, forming a thin layer of a harder alloy. Case hardening is usually done after the part in question …   Wikipedia

  • hydrogen cyanide — a colorless poisonous gas, HCN, having a bitter almondlike odor: in aqueous solution it forms hydrocyanic acid. [1880 85] * * * ▪ chemical compound also called  formonitrile (HCN)        a highly volatile, colourless, and extremely poisonous… …   Universalium

  • case-harden — /keɪs ˈhadn/ (say kays hahdn) verb (t) 1. Metallurgy to make hard the outside surface of alloys having an iron base, leaving the interior tough and ductile by carburising, cyanide hardening, or nitriding and suitable heat treatment. 2. to harden… …   Australian English dictionary

  • Nitrogen generator — Nitrogen generators and stations are stationary or mobile air to nitrogen production complexes. In advanced economies, membrane nitrogen plants have almost ousted alternative processes of nitrogen generation in all cases where nitrogen is not… …   Wikipedia

  • metallurgy — metallurgic, metallurgical, adj. metallurgically, adv. metallurgist /met l err jist/ or, esp. Brit., /meuh tal euhr jist/, n. /met l err jee/ or, esp. Brit., /meuh tal euhr jee/, n. 1. the technique or science of working or heating metals so as… …   Universalium

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