1) complete annealing: heating at 390 ~ 430℃; According to the effective thickness of the material, the heat preservation time is 30 ~120min; Cool to 300 DEG C with that furnace at the speed of 30-50 DEG C/hour, and then air cooling.

2) rapid annealing: heating at 350-370 DEG C; According to the effective thickness of the material, the heat preservation time is 30 ~120min; Air or water cooling.

3) quenching aging: quenching at 500-510℃ and air cooling; Artificial aging at 95 ~ 105℃ for 3 hours and air cooling; Natural aging room temperature 120h