That which hardens, as a material used for converting the surface of iron into steel.
Process that increases the hardness of steel, i.e., the degree to which steel will resist cutting, abrasion, penetration, bending, and stretching, The increased endurance provided by hardening makes steel suitable for additional applications. Hardening can be achieved through various methods, which include: (1) heat treatment, where the properties of steel are altered by subjecting the steel to a series of temperature changes; and (2) cold working, in which changes in the structure and shape of steel are achieved through rolling, hammering, or stretching the steel at a relatively low temperature.
the process of taking a soft die, roll, or plate and making it metallurgically hard. In the process of producing engraved stamps, the design can only be worked into soft steel, but is generally only transferred from hard steel. The hardening process can be reversed. That is, a hardened die, roll or plate can be made metallurgically soft again.
See also: Colour Temperatures.
Increasing the hardness of steel by heat treatment. The steel is heated to a suitable austenitizing temperature, holding at that temperature for a sufficient time to affect the desired solution of carbon and other alloying elements, then quenching in a suitable medium, such as water, oil, air, polymer or molten salts to form martensite.
The result of many changes that occur in a plant as it develops resistance to adverse conditions, especially cold.
Subjecting a seedling or plant to cooler temperatures in order to increase its resistance to more extreme cold.
Heat treatment process that involves bringing the steel to austentisation temperature and then cooling it by the most expedient means (water, oil, salt, etc.) in such a way as to provoke the formation of martensite.
Increasing the hardness of metal by suitable treatment, usually involving heating and cooling.
The process of achieving cold hardines. In a broad sense it's the process that increases plants ability to survive the impact of unfavorable environmental stress. Water, nitrogen, other practices can affect this process
(As applied to heat treatment of steel.) Heating and quenching to produce increased hardness.
The design of the stamp needs to be engraved into soft metal. Hardening is the process of taking the soft die, transfer roll, or engraved plate and making it hard by tempering and by replacing the carbon. Often this was done by packing the die in charcoal or potash and placing it in a sealed container. This sealed container was then heated to intense temperatures for a specified amount of time. Only skilled craftsmen were allowed to perform this step, since the hardness of the dies and plates was critical in the production of the stamps.
a heat treatment process for making metal hard enough to cut other metals and resist wear; as with annealing, after first heating the metal to a certain temperature, the metal is quenched rather than allowed to cool slowly
heating and rapidly cooling steel.
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.
A process by which the tolerance of extreme conditions, e.g. cold or drought, is increased by prior exposure to the same but less extreme conditions.
A Heat Treating Process that implies heating steel to a temperature above the critical range, and cooling it rapidly enough through the critical range to harden it appreciably.
the formation of martensite resulting from the heating and quenching of certain iron-base alloys.
Treatment of manufactured regenerated-protein filaments so as to render them completely insoluble in cold water and cold dilute saline solutions.
Any process which increases the hardness of a metal. Usually heating and quenching certain iron base alloys from a temperature either within or above the critical temperature range.