A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
A process of hardening a ferrous alloy of suitable composition
by heating within or above the transformation range and quenching
Steel adaptable to hardening by heat treatment and quenching in
Stain produced by the incomplete burning of the lubricants on
the surface of the sheet. Rolling subsequent to staining will change
color from darker browns to lighter browns down to white.
A method of measuring the ductility and drawing properties of
strip or sheet metal which involves determination of the width
and depth of impression. The test simulating a deep drawing operation
is made by a standard steel ball under pressure, continuing until
the cup formed from the metal sample fractures. Readings are in
thousandths of an inch. This test is sometimes used to detect stretcher
straining and indicates the surface finish after drawing, similar
to the Erichsen ductility test.
Process of making steel by heating the metal in the hearth of
a regenerative furnace. In the basic open-hearth steel process,
the lining of the hearth is basic, usually magnesite; whereas in
the acid open-hearth steel process, an acid material, silica, is
used as the furnace lining and pig iron, extremely low in phosphorous
(less than 0.04%), is the raw material charged in.
Rough surface on black plate, sheet or strip, resulting from imperfections
in the original steel bars from which the plate was rolled.
(Effect) - A surface roughening (defect) encountered in forming
products from metal stock that has a coarse grain size. It is due
to uneven flow or to the appearance of the overly large grains
usually the result of annealing at too high a temperature. Also
referred to as pebbles and alligator skin.
A mineral from which metal is (or may be) extracted.
(Crystal) - Arrangement of certain crystal axes or crystal planes
in a polycrystalline aggregate with respect to a given direction
or plane. If there is any tendency for one arrangement to predominate,
it is known as the preferred orientation. In the absence of any
such preference, random orientation exists.
A method of even winding metal strip or wire on to a reel or mandrel
wherein the strands are uniformly overlapped. Sometimes termed stagger
wound or vibrated wound. The opposite of ribbon
Aging under conditions of time and temperature greater than those
required to obtain maximum strength.
The addition of oxygen to a compound. Exposure to atmosphere sometimes
results in oxidation of the exposed surface, hence a staining or
discoloration. This effect is increased with temperature increase.
Compound of oxygen with another element.
A length of pipe used to convey oxygen onto a bath of molten metal.