Introduction to industrial pure aluminum

Introduction to industrial pure aluminum

Industrial pure aluminum can not be heat treatment strengthening, can be cold deformation to improve strength, the only form of heat treatment is annealing, recrystallization start temperature is related to impurity content and deformation, generally around 200 °C. σb=80~100MPa, σ0.2=30~50MPa, ζ=35%~40%, HB=25~30. After 60%~80% cold deformation, although the chaos can be increased to 150~180MPa, the ζ value drops to 1%~1.5%. Increasing the content of iron and silicon impurities can improve strength, but reduce plasticity, conductivity and corrosion resistance. The annealing softening characteristics and cold work hardening characteristics of 1200 (L5) industrial pure aluminum plate, and the mechanical properties of different cold work hardening states can be obtained by adjusting the annealing temperature after cold deformation or controlling the cold deformation amount after annealing. In order to improve formability, it is better to use the previous method.

Chemical composition of industrial pure aluminum

Magnesium Mg: 0.05 ;

Zinc Zn: 0.05 ;

Manganese Mn: 0.05;

Titanium Ti: 0.03;

Vanadium V: 0.05;

Fe: 0.40 ;

Single: 0.03.

Heat treatment specifications:

1) Complete annealing: heating 390~430°C; With the different effective thickness of the material, the holding time is 30~120min; At a speed of 30~50 °C/h, it is cooled to 300 °C with the furnace, and then air cooled.

2) Rapid annealing: heating 350~370°C; With the different effective thickness of the material, the holding time is 30~120min; Empty or water-cooled.

3) Quenching and aging: quenching 500~510 °C, air cooling; Artificial aging 95~105°C, 3h, air cooling; Natural aging room temperature 120h.