from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. Present participle of caseharden.
from the GNU version of the Collaborative International Dictionary of English
- n. The act or process of converting the surface of iron into steel.
from The Century Dictionary and Cyclopedia
- n. In metallurgy, a rapid process of cementation, in which the surface of wrought-iron is converted into steel by heating the article to be treated in an iron box, in contact with some animal matter, such as bone, parings of horses' hoofs, or leather. This is done in a smith's forge, or in any suitable furnace.
- n. A process of induration affecting surfaces of rocks.
Sorry, no etymologies found.
a steel can be made, even by an ordinary traveller, out of common iron, by means of "casehardening" (which see).
Which steels can be worked by means of casehardening?
Steels of a carbon content below 0.35 per cent can be hardened at their surfaces when carbon is added to the steel from outside by means of a special process (casehardening).
Figure 9 - Box for casehardening - 1 fireproof box with cover, 2 workpiece, 3 carbon-containing powder, 4 sand, 5 clay
- In case of casehardening, sheet-metal boxes filled with sand and carbon-containing powder and equipped with cover are required.
Prefabricated steel straightedges, back squares and centre squares are to be treated by casehardening and subsequent tempering.
-- A box of cast or wrought iron should be provided large enough to hold one or two of the pieces, with sufficient room all around to pack well with the casehardening materials, which may be leather scrap, hoof shavings, or horn shavings, slightly burned and pulverized, which may be mixed with an equal quantity of pulverized charcoal.
Machinery steel may be annealed in spent ground-bone that has been used in casehardening; _but tool steel must never be annealed in this way_, as it will be injured by the phosphorus contained in the bone.
- sheet-metal inserts for casehardening with sand and carbon-containing powder filling;
casehardening should be mentioned as specific processes of heat treatment.