Die-Cast Terms &Die casting Definitions (Reference Aid Only - Uncontrolled)

Aging
A change in the metallurgical structure of an alloy occurring over a period of time following casting， which affects the properties and dimensions。 Heating accelerates aging。

Alloy
A substance having metallic properties and composed of two or more chemical elements， of which at least one is metal。 Alloy properties are usually different from those of alloying elements。

Anode
The electrode in a plating bath at which metal ions are formed， negative ions are discharged， or other oxidizing reactions occur。

Anodic Metal
Any metal that tends to dissolve， corrode， or oxidize in preference to another metal when the metals are connected electrically in the presence of electrolyte。

Anodizing
To subject a metalDie casting to electrolytic action as the anode of a cell in order to coat with a protective orzinc die casting decorative film。

As Cast
Condition of a casting that has not received finishing (beyond gate removal or sandblasting) or treatment of any kind including heat treatment after casting。

Atmospheric Corrosion
Surface corrosion caused by exposure to gasses or liquids that attack the metal。

Barrel Plating
Plating in which the work is processed in bulk in rotating container。

BHN
Brinell Hardness Number

Biscuit
Excess metal left at the end of injection cylinder of a cold chamberzinc die casting machine， formed at the end of the plunger stroke， also called a slug。

Blister
A surface defect or eruption caused bydie casting machine expansion of gas， usually as a result of heating trapped gas within the casting， or under metal plated on the casting。

Blow Holes
Voids or holes that may occur due to entrapped air or shrinkage during solidification of heavy sections。

Bright Finish
A finish with a uniform nonMulti slider die casting machine-directional smooth surface of high secular reflectance。

Buffing
The smoothing of a surface by means of a rotating flexible when the surface of which fine abrasive particles are applied in liquid suspension sion， paste， or grease-stick form。

Cass Test
(Copper accelerated salt spray) An accelerated corrosion testMulti slider die casting machine for electroplated substrates (&_STM 369-68)

Casting Yield
The weight of casting or castings divided by the total weight of metal injected into the die， expressed as a percent。

Cathode
The electrode in the electroplating at which metallic ions are discharged， negative ions are formed， or other reducing actions occurdie casting machine。

Cathode Robber
An auxiliary cathode so placed as to divert electrical current to itself from portions of the articles being plated which would otherwise receive too high a current density。

Cathodic Metal
Any metal that does not tend to dissolve， corrode， or o daze in preference to another metal when the metals are connected electrically in the presence of an electrolyte。

Cavity
The recess in the die in which the casting is formed。

Charpy
Name of an impact test in which the specimen， forming a simpt beam， is struck by a hammer while resting against anvil supports spaced mm apart。

Checking
Heat-crazing of a die surface， especially when subjected to repeated heating by molten alloys at high casting temperatures。 The resulting fine cracks produce corresponding raised veins on die castings。

Chromate
A conversion coating consisting of trivalent and hexavalent chromium compounds。