2A14 characteristics and scope of application 2A14 board 13585635591

  Brand: 2A14 standard: GB / T 3191-1998 ● characteristics and scope of application:
2A14 belongs to both hard aluminum alloy and forged aluminum alloy in terms of composition
Compared with 2A50, 2A14 has higher copper content,
Therefore, it has high strength and good thermal strength, but its plasticity in hot state is not as good as 2A50
The alloy has good machinability, contact welding
Good performance of spot welding and roll welding, poor performance of arc welding and gas welding; It can be strengthened by heat treatment and has extrusion effect; The corrosion resistance is not high, and there is a tendency of inter inspection corrosion during artificial aging

● chemical composition: aluminum, al: residual silicon, Si: 0
6 ~ 1
2, copper, Cu: 3
9 ~ 4
8
Mg: 0
40 ~ 0
8 Zn: & le; 0
30 Mn: 0
40 ~ 1
0 Ti: & le; 0
15　　
Nickel: Ni: & le; 0
10 Fe: 0
000 ～ 0
700 note: single: & le; 0
05; Total: & le; 0
10　
● mechanical properties: tensile strength & sigma; b (MPa)：≥ 440 elongation & Delta; 5 (％)：≥ 10　
Note: specimen size of longitudinal mechanical properties of bar at room temperature: bar diameter (inscribed circle diameter of square bar and hexagonal bar) ≤ 22　　
● heat treatment specification: 1) homogenization annealing: heating 475 ~ 490 ℃; Heat preservation for 12 ~ 14h; The furnace is cold

2) Complete annealing: heating 350 ~ 400 ℃;
With different effective thickness of materials, the holding time is 30 ~ 120min; Cool the furnace to 300 ℃ at the speed of 30 ~ 50 ℃ / h, and then air cool

3) Rapid annealing: heating 350 ~ 460 ℃; Holding time: 30 ~ 120min; Air cooling

4) Quenching and aging: quenching at 495 ~ 505 ℃, water cooling; Natural aging room temperature 96h