AskDefine | Define forge

Dictionary Definition



1 furnace consisting of a special hearth where metal is heated before shaping
2 a workplace where metal is worked by heating and hammering [syn: smithy]


1 create by hammering; "hammer the silver into a bowl"; "forge a pair of tongues" [syn: hammer]
2 make a copy of with the intent to deceive; "he faked the signature"; "they counterfeited dollar bills"; "She forged a Green Card" [syn: fake, counterfeit]
3 come up with (an idea, plan, explanation, theory, or priciple) after a mental effort; "excogitate a way to measure the speed of light" [syn: invent, contrive, devise, excogitate, formulate]
4 move ahead steadily; "He forged ahead"
5 move or act with a sudden increase in speed or energy [syn: spurt, spirt]
6 make something, usually for a specific function; "She molded the riceballs carefully"; "Form cylinders from the dough"; "shape a figure"; "Work the metal into a sword" [syn: shape, form, work, mold, mould]
7 make out of components (often in an improvising manner); "She fashioned a tent out of a sheet and a few sticks" [syn: fashion]

User Contributed Dictionary



Etymology 1

From Old French forge, earlier faverge, from Latin fabrica workshop, from faber (genitive fabri) workman in hard materials, smith. Sense of to counterfeit is in Anglo-French verb forger falsify, from Old French forgier, from Latin fabricari to frame, construct, build.


  1. furnace or hearth where metals are heated prior to hammering them into shape
  2. workshop in which metals are shaped by heating and hammering them
  3. A counterfeit
furnace or hearth

Etymology 2

Make way, move ahead, most likely an alteration of force, but perhaps from forge (n.), via notion of steady hammering at something. Originally nautical, in referrence to vessels.


  1. To shape a metal by heating and hammering.
  2. To form or create with concerted effort.
    The politician's recent actions are an effort to forge a relationship with undecided voters.
  3. To create a forgery of; to make a counterfeit item of; to copy or imitate unlawfully.
    He had to forge his ex-wife's signature.
    ''The jury learned the documents had been forged.
  4. (often as forge ahead) To move forward heavily and slowly (originally as a ship); to advance gradually but steadily; to proceed towards a goal in the face of resistance or difficulty.
    The party of explorers forged through the thick underbrush.
    We decided to forge ahead with our plans even though our biggest underwriter backed out.
  5. (sometimes as forge ahead) To advance, move or act with an abrupt increase in speed or energy.
    With seconds left in the race, the runner forged into first place.
to shape a metal
to create a forgery of
  • Dutch: vervalsen
  • Finnish: väärentää
  • German: fälschen
  • Polish: fałszować, podrabiać
to move forward gradually in the face of resistance

Derived terms

Extensive Definition

A forge is the workplace of a smith or a blacksmith. A forge is sometimes referred to as a smithy.
The basic smithy contains a forge, also known as a hearth, for heating metals. The forge heats the workpiece to a malleable temperature or to the point where work hardening no longer occurs. The workpiece is transported to and from the forge using tongs. The tongs are also used to hold the workpiece on the smithy's anvil while the smith works it with a hammer. Finally the workpiece is transported to the slack tub, which rapidly cools the workpiece in a large body of water. The slack tub also provides water to control the fire in the forge.

Types of forges

Coal/coke/charcoal forge

A forge which typically uses bituminous coal, industrial coke or charcoal as the fuel to heat metal. The designs of these forges have varied over time, but whether the fuel is coal, coke or charcoal the basic design has remained the same.
A forge of this type is essentially a hearth or fireplace designed to allow a fire to be controlled such that metal introduced to the fire may be brought to a malleable state or to bring about other metallurgical effects (hardening, annealing, and drawing temper as examples). The forge fire in this type of forge is controlled in three ways: 1) amount of air, 2) volume of fuel, and 3) shape of the fuel/fire.
Over thousands of years of forging, these devices have evolved in one form or another as the essential features of this type of forge:
  • Tuyere -- a pipe through which air can be forced into the fire
  • Bellows or blower -- a means for forcing air into the tuyere
  • Firepot or hearth -- a place where the burning fuel can be contained over or against the tuyere opening.
During operation, fuel is placed in or on the hearth and ignited. A source of moving air, such as a fan or bellows, introduces additional air into the fire through the tuyere. With additional air, the fire consumes more fuel and burns hotter.
A blacksmith balances the fuel and air in the fire to suit particular kinds of work. Often this involves adjusting and maintaining the shape of the fire.
In a typical, but by no means universal, coal forge, a firepot will be centered in a flat hearth. The tuyere will enter the firepot at the bottom. In operation, the hot core of the fire will be a ball of burning coke in and above the firepot. The heart of the fire will be surrounded by a layer of hot but not burning coke. Around the unburnt coke will be a transitional layer of coal being transformed into coke by the heat of the fire. Surrounding all is a ring or horseshoe-shaped layer of raw coal, usually kept damp and tightly packed to maintain the shape of the fire's heart and to keep the coal from burning directly so that it "cooks" into coke first.
If a larger fire is necessary, the smith increases the air flowing into the fire as well as feeding and deepening the coke heart. The smith can also adjust the length and width of the fire in such a forge to accommodate different shapes of work.
The major variation from the forge and fire just described is a 'back draft' where there is no fire pot, and the tuyere enters the hearth horizontally from the back wall.
Coke and charcoal may be burned in the same forges that use coal, but since there is no need to convert the raw fuel at the heart of the fire (as with coal), the fire is handled differently.
Individual smiths and specialized applications have fostered development of a variety of forges of this type, from the coal forge described above, to simpler constructions amounting to a hole in the ground with a pipe leading into it.

Gas forge

A forge typically uses propane or natural gas as the fuel. One common, efficient design uses a cylindrical forge chamber and a burner tube mounted at a right angle to the body. The chamber is typically lined with refractory materials, preferably a hard castable refractory ceramic. The burner mixes fuel and air which are ignited at the tip, which protrudes a short way into the chamber lining. The air pressure, and therefore heat, can be increased with a mechanical blower or by taking advantage of the Venturi effect.
Gas forges vary in size and construction, from large forges using a big burner with a blower or several atmospheric burners to forges built out of a coffee can utilizing a cheap, simple propane torch. A small forge can even be carved out of a single soft firebrick.
The primary advantage of a gas forge is ease of use, particularly for a novice. A gas forge is simple to operate compared to coal forges, and the fire produced is clean and consistent. They are less versatile, as the fire cannot be reshaped to accommodate large or unusually shaped pieces;. It is also difficult to heat a small section of a piece. A common misconception is that gas forges cannot produce enough heat to enable forge-welding, but a well designed gas forge is hot enough for any task.

Finery forge

A finery forge is a water-powered mill where pig iron is refined into wrought iron.

Forging Equipment


The anvil serves as a work bench to the blacksmith, where the metal to be beaten is placed. An anvil body is made of mild steel, with a top face of high carbon steel approximately 20mm thick welded on it. The flat top has two holes; the wider is called the hardy hole, where the square shank of the hardy fits. The smaller hole is called the punch hole, used as clearance when punching holes in hot metal.


Chisels are made of high carbon steel whose cross-section is an octagon. They are hardened and tempered at the cutting edge while the head is left soft so it will not crack when hammered. Chisels are of two types, the hot and cold chisels. The cold chisel is used for cutting cold metals while the hot chisel is for hot metals. Usually the hot chisels are thinner and therefore can not be substituted with the cold chisel.


Tongs are used by the blacksmith for holding hot metals securely. The mouths are made in various shapes to suit the gripping of various shapes of metal.


Fullers are forming tools of different shapes used in making grooves or hollows. They are often used in pairs, the bottom fuller has a square shank which fits into the hardy hole in the anvil while the top fuller has a handle. The work is placed on the bottom fuller and the top is placed on the work and struck with a hammer. The top fuller is also used for finishing round corners and for stretching or spreading metal.


The hardy is a cutting tool similar to the chisel. It is used as a chisel or hammer for cutting both hot and cold metals. It has a square shank that fits into the hardy hole in the anvil, with the cutting edge facing upwards. The metal to be cut is placed on the cutting edge and struck with a hammer.
forge in Catalan: Forja
forge in Danish: Smedje
forge in German: Schmiede
forge in Spanish: Forja
forge in French: Forgeage
forge in Italian: Fucina
forge in Japanese: 鍛造
forge in Georgian: ჭედვა
forge in Latvian: Smēde
forge in Dutch: Smeden
forge in Norwegian: Smie
forge in Polish: kucie
forge in Russian: ковка
forge in Swedish: Smide

Synonyms, Antonyms and Related Words

act like, affect, assume, beat, blacksmith shop, block out, bloomery, borrow, build, carve, cast, chisel, chorus, coin, concoct, construct, cook up, copy, counterfeit, create, crib, cut, devise, ditto, do, do like, echo, efform, fabricate, fake, falsify, fantasize, fashion, figure, fix, form, formalize, found, foundry, frame, fudge, furnace, go like, hatch, hew, hoke, hoke up, imitate, invent, knead, knock out, lay out, lick into shape, make, make like, make up, manufacture, metalworks, mint, mirror, model, mold, mould, plagiarize, pound, put together, reecho, reflect, repeat, reproduce, rough out, roughcast, roughhew, sculpt, sculpture, set, shape, shove the queer, simulate, smelter, smithery, smithy, stamp, steel mill, steelworks, stithy, tailor, thermoform, think up, trump up, turn out, utter, work
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