Characteristics and mechanical properties of aluminum alloy 2A14

The composition and properties from the point of view 2A14 it is hard alloy wrought Aluminum Alloys can also fall 2A50, 2A50 it differs in that the copper content is high, so high strength, heat resistance is good, but the hot state under the plastic as well 2A50 alloy has good machinability, electrical resistivity. performance is good spot and seam welding, arc welding and gas welding performance is poor; can be heat strengthened, with squeeze effect; Therefore, vertical transverse performance has differences; corrosion resistance is not high, but in the state of artificial aging tendency to intergranular corrosion and stress corrosion cracking tendencies.

Mechanical properties:

Tensile strength σb (MPa): ≥ 440

Elongation δ5 (%): ≥ 10

Note: The mechanical properties of longitudinal bars at room temperature

Sample Size: bar diameter (square bar, hexagonal bar inscribed circle diameter) ≤ 22

Heat treatment specifications:

A) homogenizing annealing: heating 475 ~ 490 ℃; insulation 12 ~ 14h; furnace cooling.

2) complete annealing: heating 350 ~ 400 ℃; with the effective thickness different, holding time 30 ~ 120min; to 30 ~ 50 ℃ / h speed with furnace cooling to 300 ℃, and then cooled.

3) rapid thermal annealing: heating 350 ~ 460 ℃; holding time 30 ~ 120min; air cooling.

4) quenching and aging: quenching 495 ~ 505 ℃, water; natural aging at room temperature for 96h.