Metallurgy

190 entries in this trade.

muller

A machine that mixes clay and sand under a roller for use in preparing a mould for metal casting.

niello

Any of various black metal alloys, made of sulphur with copper, silver or lead, used to create decorative designs on other metals.

nitrox

An industrial process for case hardening (imparting greater surface hardness to) metal objects, involving nitrocarburizing (the diffusion of carbon and nitrogen into the metal) followed by oxidation.

normalize

To anneal (steel) for the purpose of decreasing brittleness and increasing ductility.

Pachuca tank

A high narrow tank with a central cylinder for the introduction of compressed air, used in the agitation and settling of pulp (pulverized ore and water) during treatment by the cyanide process.

pig iron

A brittle, impure form of iron produced by smelting iron ore which is often shaped into blocks; it is unsuitable for working but suitable for casting, and so is commonly used as an industrial raw material; (countable) a sample of such iron.

pipe

Of a metal ingot: to become hollow in the process of solidifying.

pole

To treat (copper) by blowing natural gas or other reducing agent through the molten oxide, burning off the oxygen.

postuniform

adjectiveMetallurgy

Pertaining to the state where elongation is a function of the strainrate hardening exponent determined near maximum load

puddling

The first true industrial process to produce steel from pig iron.

quench

To cool rapidly by direct contact with liquid coolant, as a blacksmith quenching hot iron.

quenching

The rapid cooling of a hot metal object, by placing it in a liquid, in order to harden it.

red rot

The chemical dezincification of brass alloys, where the zinc in the brass leaches out and leaves behind fragile or powdery copper metal.

redsear

verbMetallurgyobsolete

To break or crack through brittleness when red-hot; to be red-short or hot-short.

reduce

To produce metal from ore by removing nonmetallic elements in a smelter.

refractory metal

A metal, such as molybdenum or tungsten, with a high refraction, and hence a high melting point.

regenerative furnace

A furnace having a regenerator in which gas used for fuel, and air for supporting combustion, are heated; a Siemens furnace.

reverberate

verbMetallurgyobsolete

To heat something by deflecting flames on to, or passing flames over, it.

scoria

The slag or dross that remains after the smelting of metal from an ore.

self-hardening

adjectiveMetallurgy

Designating, or pertaining to, any of various steels that harden when heated to above a red heat and cooled in air, usually in a blast of cold air with moderate rapidity, without quenching. Such steels are alloys of iron and carbon with manganese, tungsten and manganese, chromium, molybdenum and manganese, etc. They are chiefly used as high speed steels.

slush-cast

To create hollow castings in which molten metal is poured into a metallic mould and then poured out again, leaving a thin solidified layer of the metal on the walls of the mold.

smelting

The process of melting or fusion, especially to extract a metal from its ore.

sorbitization

The process of sorbitizing, especially in the hardening of metal by interrupted quenching.

sprue

A channel through which molten metal is poured into the mold during the casting process.

strickle

A bevel-edged finishing tool used for smoothing the surface of a mold, core, or mold in sand or loam.

STS

Initialism of special treatment steel (a type of homogenous armor plate).

superalloy

Any of several high-performance alloys that are resistant to high temperatures.

superduplex

adjectiveMetallurgy

Of stainless steel: having a duplex structure (containing austenite and ferrite in roughly equal proportions) and also having unusually high hardness, strength or corrosion resistance.

taphole

In a blast furnace, a hole which molten metal or slag is tapped off through.

tempered

adjectiveMetallurgy

Pertaining to the metallurgical process for finishing metals.

thermal analysis

Any of several analytical techniques that monitor the chemical and physical changes that occur as a material is heated.

try-off

A test for clearance, bearings, and metal thickness of a mold.

Tutania

An alloy of copper, antimony, zinc and tin patented in 1770 by William Tutin, whose firm used it in commercial production of housewares.

underdraught

The situation where part of a formed or cast shape has a reverse taper or inward‑leaning surface that makes it difficult to remove from the die or mold.

unnoble

adjectiveMetallurgy

Of a metal, being at the lower end of the electrochemical series, i.e. oxidising readily.