Aluminum alloys: wrought and cast

Wrought and cast alloys

industry aluminum alloys, including the "mark" aluminum, подразделяют на две группы:

The term "deformable" means, that of the aluminum alloy product is made of aluminum metal forming methods, то есть прессованием (экструзией), rolling, forging, punching.

The term "casting" means, respectively, These aluminum alloys are used for manufacturing aluminum castings.

The boundary between wrought and cast alloys

Условная граница между этими двумя группами алюминиевых сплавов при одинаковых легирующих компонентах связана с пределом насыщения твердого раствора при эвтектической температуре (см. drawing).

Aluminum alloys with less than the limit component at a high temperature solubility have the highest ductility and lower the strength and, Consequently, well to hot plastic working.


Aluminum alloy castability

best fluidity – the most important property casting aluminum alloys – are metals, которые кристаллизуются при постоянной температуре (чистые металлы, эвтектические сплавы).

When going over the limit of solubility at high temperature is sharply increased castability. However, aluminum casting alloys should not contain more 15-20 % eutectic avoid deterioration of mechanical and technological properties.

All casting aluminum alloys can harden as a result of thermal treatment. The degree of hardening of the less, more casting aluminum alloy doped and, Consequently, in its structure over the eutectic.

The ability to heat strengthened

Wrought Aluminum Alloys подразделяются на:

Теоретическая граница между этими группами является предел насыщения твердого раствора при комнатной температуре (см. drawing). When the content of the alloying element less than the saturation limit of the solid solution at ambient temperature hardening by thermal treatment can not in principle be. However, in practice a small excess of this limit, thermal hardening may not be achieved due to the small amount of the hardening phase.

При сплавлении с другими элементами (Cu, Mn, At the, Mg, Si, Zn и др.) алюминий образует двойные системы (сплавы) с переменной растворимостью, which makes them capable of thermally hardened by quenching and aging. However, in binary aluminum alloys AlCu, AlSi, AlMg, AlZn the effect of the heat treatment is less significant, than ternary and more complicated alloys. Therefore, the primary application received at the double, and more difficult to doped alloys - aluminum alloys systems AlMgSi, AlCuMg, AlZnMg.

See. also Weldable and non-weldable aluminum alloys

Gulyaev AP. metal science, 1986.
Aluminium and aluminium alloys, ASM International, 1993.