When aluminum alloy runs through the production process of steel tube extrusion effect is what?
About aluminum alloy runs through the production process of steel tube extrusion effect: high many alloying and transition element how a02 aluminum alloy, such as 6, 2 a11, 2 a12, 2 a14, 7 a04, 3 a21, 5 how a02, etc. , after heat treatment (
Quenching and aging or annealing)
Longitudinal strength is obtained by other methods such as rolling, drawing of the products,
Other things being equal)
High, and the elongation is low;
Long short transverse and transverse performance is low, the extrusion products unique phenomenon called extrusion effect.
Its essential to there is no unified conclusion, but most scholars think: 1, the extrusion direction were found to have a strong orientation deformation structure.
This crystal to have a face-centered cubic structure of metal aluminum, because the atoms are arranged in the direction of maximum density, thus has maximum intensity.
2, both contain excessive metal, such as Mn, Cr, Zr, etc. , the transition of metal in the form of supersaturated solid casting dissolved in aluminium, in after extrusion processing and heat treatment process, the grain boundary precipitate in dispersion state in large quantities, stop the elongated the multilateral deformation and recrystallization texture.