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Case-hardening

Index Case-hardening

Case-hardening or surface hardening is the process of hardening the surface of a metal object while allowing the metal deeper underneath to remain soft, thus forming a thin layer of harder metal (called the "case") at the surface. [1]

57 relations: Alloy steel, Aluminium, Armour, Austenite, Bar stock, Barium carbonate, Bloomery, Blow torch, Bluing (steel), Bolt (firearms), Bone, Boriding, Boron, Brittleness, Camshaft, Carbon, Carbon monoxide, Carbon steel, Carburizing, Charcoal, Chromium, Common knowledge, Cyanide, Differential heat treatment, Diffusion hardening, Ductility, Ferrite (magnet), Finery forge, Firearm, Firing pin, Forge, Hardenability, Hardening (metallurgy), Hardness, Hoof, Hydroxylapatite, Induction hardening, Induction heating, Iron, Leather, Martensite, Molybdenum, Nitriding, Nitrogen, Pattern welding, Phosphorus, Quench polish quench, Salt, Self-tapping screw, Shot peening, ..., Sodium cyanide, Surface engineering, Trigger (firearms), United States Department of Defense, Urine, Wear, Wrought iron. Expand index (7 more) »

Alloy steel

Alloy steel is steel that is alloyed with a variety of elements in total amounts between 1.0% and 50% by weight to improve its mechanical properties.

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Aluminium

Aluminium or aluminum is a chemical element with symbol Al and atomic number 13.

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Armour

Armour (British English or Canadian English) or armor (American English; see spelling differences) is a protective covering that is used to prevent damage from being inflicted to an object, individual or vehicle by direct contact weapons or projectiles, usually during combat, or from damage caused by a potentially dangerous environment or activity (e.g., cycling, construction sites, etc.). Personal armour is used to protect soldiers and war animals.

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Austenite

Austenite, also known as gamma-phase iron (γ-Fe), is a metallic, non-magnetic allotrope of iron or a solid solution of iron, with an alloying element.

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Bar stock

Bar stock, also (colloquially) known as blank, slug or billet, is a common form of raw purified metal, used by industry to manufacture metal parts and products.

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Barium carbonate

Barium carbonate (BaCO3), also known as witherite, is a chemical compound used in rat poison, bricks, ceramic glazes and cement.

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Bloomery

A bloomery is a type of furnace once used widely for smelting iron from its oxides.

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Blow torch

A blowtorch (U.S. and Australia), or blowlamp (UK), is a fuel-burning tool used for applying flame and heat to various applications, usually metalworking.

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Bluing (steel)

Bluing is a passivation process in which steel is partially protected against rust, and is named after the blue-black appearance of the resulting protective finish.

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Bolt (firearms)

A bolt is the part of a repeating, breech-loading firearm that blocks the rear of the chamber while the propellant burns and moves to facilitate loading of cartridges from the magazine.

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Bone

A bone is a rigid organ that constitutes part of the vertebrate skeleton.

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Boriding

Boriding, also called boronizing, is the process by which boron is introduced to a metal or alloy.

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Boron

Boron is a chemical element with symbol B and atomic number 5.

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Brittleness

# A material is brittle if, when subjected to stress, it breaks without significant plastic deformation.

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Camshaft

A camshaft is a shaft to which a cam is fastened or of which a cam forms an integral part.

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Carbon

Carbon (from carbo "coal") is a chemical element with symbol C and atomic number 6.

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Carbon monoxide

Carbon monoxide (CO) is a colorless, odorless, and tasteless gas that is slightly less dense than air.

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Carbon steel

Carbon steel is a steel with carbon content up to 2.1% by weight.

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Carburizing

Carburizing, carburising (chiefly English), or carburization is a heat treatment process in which iron or steel absorbs carbon while the metal is heated in the presence of a carbon-bearing material, such as charcoal or carbon monoxide.

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Charcoal

Charcoal is the lightweight black carbon and ash residue hydrocarbon produced by removing water and other volatile constituents from animal and vegetation substances.

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Chromium

Chromium is a chemical element with symbol Cr and atomic number 24.

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Common knowledge

Common knowledge is knowledge that is known by everyone or nearly everyone, usually with reference to the community in which the term is used.

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Cyanide

A cyanide is a chemical compound that contains the group C≡N.

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Differential heat treatment

Differential heat treatment (also called selective heat treatment or local heat treatment) is a technique used during heat treating to harden or soften certain areas of a steel object, creating a difference in hardness between these areas.

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Diffusion hardening

Diffusion hardening is a process used in manufacturing that increases the hardness of steels.

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Ductility

Ductility is a measure of a material's ability to undergo significant plastic deformation before rupture, which may be expressed as percent elongation or percent area reduction from a tensile test.

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Ferrite (magnet)

A ferrite is a ceramic material made by mixing and firing large proportions iron(III) oxide (Fe2O3, rust) blended with small proportions of one or more additional metallic elements, such as barium, manganese, nickel, and zinc.

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Finery forge

A finery forge is a hearth used to fine (i.e., produce, refine) wrought iron, through the decarburization of the pig iron.

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Firearm

A firearm is a portable gun (a barreled ranged weapon) that inflicts damage on targets by launching one or more projectiles driven by rapidly expanding high-pressure gas produced by exothermic combustion (deflagration) of propellant within an ammunition cartridge.

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Firing pin

A firing pin or striker is part of the firing mechanism used in a firearm or explosive device e.g. an M14 landmine or bomb fuze.

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Forge

A forge is a type of hearth used for heating metals, or the workplace (smithy) where such a hearth is located.

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Hardenability

The hardenability of a metal alloy is the depth up to which a material is hardened after putting through a heat treatment process.

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Hardening (metallurgy)

Hardening is a metallurgical metalworking process used to increase the hardness of a metal.

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Hardness

Hardness is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion.

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Hoof

A hoof, plural hooves or hoofs, is the tip of a toe of an ungulate mammal, strengthened by a thick, horny, keratin covering.

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Hydroxylapatite

Hydroxylapatite, also called hydroxyapatite (HA), is a naturally occurring mineral form of calcium apatite with the formula Ca5(PO4)3(OH), but is usually written Ca10(PO4)6(OH)2 to denote that the crystal unit cell comprises two entities.

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Induction hardening

Induction hardening is a type of surface hardening in which a metal part is induction-heated and then quenched.

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Induction heating

Induction heating is the process of heating an electrically conducting object (usually a metal) by electromagnetic induction, through heat generated in the object by eddy currents.

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Iron

Iron is a chemical element with symbol Fe (from ferrum) and atomic number 26.

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Leather

Leather is a durable and flexible material created by tanning animal rawhides, mostly cattle hide.

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Martensite

Martensite, named after the German metallurgist Adolf Martens (1850–1914), most commonly refers to a very hard form of steel crystalline structure, but it can also refer to any crystal structure that is formed by diffusionless transformation.

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Molybdenum

Molybdenum is a chemical element with symbol Mo and atomic number 42.

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Nitriding

Nitriding is a heat treating process that diffuses nitrogen into the surface of a metal to create a case-hardened surface.

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Nitrogen

Nitrogen is a chemical element with symbol N and atomic number 7.

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Pattern welding

Pattern welding is the practice in sword and knife making of forming a blade of several metal pieces of differing composition that are forge-welded together and twisted and manipulated to form a pattern.

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Phosphorus

Phosphorus is a chemical element with symbol P and atomic number 15.

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Quench polish quench

Quench polish quench (QPQ) is a specialized type of nitrocarburizing case hardening that increases corrosion resistance.

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Salt

Salt, table salt or common salt is a mineral composed primarily of sodium chloride (NaCl), a chemical compound belonging to the larger class of salts; salt in its natural form as a crystalline mineral is known as rock salt or halite.

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Self-tapping screw

A self-tapping screw is a screw that can tap its own hole as it is driven into the material.

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Shot peening

Shot peening is a cold working process used to produce a compressive residual stress layer and modify mechanical properties of metals and composites.

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Sodium cyanide

Sodium cyanide is an inorganic compound with the formula NaCN.

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Surface engineering

Surface engineering is the sub-discipline of materials science which deals with the surface of solid matter.

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Trigger (firearms)

A trigger is a mechanism that actuates the firing sequence of a firearm, airgun, crossbow or speargun.

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United States Department of Defense

The Department of Defense (DoD, USDOD, or DOD) is an executive branch department of the federal government of the United States charged with coordinating and supervising all agencies and functions of the government concerned directly with national security and the United States Armed Forces.

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Urine

Urine is a liquid by-product of metabolism in humans and in many animals.

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Wear

Wear is the damaging, gradual removal or deformation of material at solid surfaces.

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Wrought iron

puddled iron, a form of wrought iron Wrought iron is an iron alloy with a very low carbon (less than 0.08%) content in contrast to cast iron (2.1% to 4%).

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Case hardened, Case hardening, Case-hardened, Casehardening, Face-hardening, Facehardening, Flame hardening, Surface Hardening, Surface harden, Surface hardening, Surface hardening of steel, Surface-hardening.

References

[1] https://en.wikipedia.org/wiki/Case-hardening

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