A process in which a high temperature flame is applied to the surface of a hardenable steel to convert it to austenite. The surface is then quenched to harden it.
A process consisting of heating a desired area, usually localized, with an oxyacetylene torch or other type of high temperature flame and then quenched to pro duce a desired hardness.
In this method of hardening, the surface layers of a medium or high carbon steel is heated by a high temperature torch and then quenched.
This is a hardening technique using oxy/acetylene torch to heat a camshaft to a cherry red which is then quenched in a water based coolant.
A surface hardening process in which heat is applied by a high temperature flame followed by quenching jets of water. It is usually applied to medium to large size components such as large gears, sprockets, slide ways of machine tools, bearing surfaces of shafts and axles, etc. Steels most suited have a carbon content within the range 0.40-0.55%.
The localised surface heating of a medium carbon steel by an impinging gas flame so that the temperature is raised above 900oC. The part is quenched (or self-quenches by virtue of the remaining cool bulk of the component) and tempered to produce a hard martensitic structure at the surface.
A surface hardening process involving localized flame heating to above the austenite transformation temperature, Ac3, followed by quenching. See Ac3.
