From Structure, Properties, and Applications of Various Alloys

Preparation of Alloys

There are four commonly employed methods for the manufacture of alloys: the fusion method, the electro-deposition method, the reduction method, and powder metallurgy.

The Fusion Method

This method uses alloying elements in a fixed proportion and fuses them together in a refractory melting pot or in a brick-lined crucible. The component metal with a higher melting point is melted first and then the other component with a lower melting point is added to the melt. Both metal components are mixed well and allowed to melt further. The molten mass is covered by powdered Carbon to avoid oxidation of the molten alloy components because they are very reactive to the surrounding atmospheric oxygen. The resulting molten mass is allowed to cool at room temperature.

The Electro-Deposition Method

This method involves simultaneous deposition of different component metals from the electrolytic solution containing their salts solution mixture by passing direct electricity.

The Reduction Method

Metal may exist in the form of compounds. Reduction is a chemical process in which a compound of one component can be separated from another component, to get a pure metal. This method is performed in an electric furnace.

Note

In all the methods used to prepare alloys, Carbon, salts, and oxides are residuals that may hinder the properties of the produced alloy, which is generally contaminated.

Powder Metallurgy

Powder metallurgy may be defined as the art of producing fine metal powders and then making articles from individual metal powders or alloyed metal powders with or...


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Master Alloys and Alloying Additives
Master alloys and alloying additives are alloy element concentrates, grain refiners, hardeners, deoxidants and other agents added into a melt or metal powder blend to produce a particular alloy, modify a melt or alter processing characteristics.
Powder Metal Services
Powder metal services are used to create finely divided or powdered metals that are used in fabricating sintered parts, thermal spraying, filling plastics, and other specialized applications. Powdered metals include most types of metals.
Powder Production Equipment
Powder production equipment includes melt atomizers, plasma generators and CVD systems used to manufacture powders, nanoparticles, nanotubes, nanomaterials and other particulate materials.
Filler Alloys and Consumables
Filler metal alloys and consumables used in welding, brazing or soldering include items in rod sheet, wire spool, coated stick, weld stud, powder, preform or paste forms.

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