air-hardening

air-hardening
/air"hahr'dn ing/, adj. Metall.
noting any metal, esp. alloy steel, that can be hardened from above its transformation point by cooling in air.
[1905-10]

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Universalium. 2010.

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  • air-hardening steel — noun : an alloy steel that can be hardened by cooling from a temperature higher than the transformation range either in air or by quenching in a liquid called also self hardening steel …   Useful english dictionary

  • self-hardening steel — noun : air hardening steel …   Useful english dictionary

  • 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

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  • Case hardening of rocks — Case hardening is a weathering phenomenon of rock surface induratoin. It is observed commonly in: felsic alkaline rocks, such as nepheline syenite, phonolite and trachyte; pyroclastic rocks, as pyroclastic flow deposit, fine air fall deposits and …   Wikipedia

  • surface hardening — ▪ metallurgy       treatment of steel by heat or mechanical means to increase the hardness of the outer surface while the core remains relatively soft. The combination of a hard surface and a soft interior is greatly valued in modern engineering… …   Universalium

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