What is the stamping performance of metal materials?

The stamping properties of common metal materials are described as follows: (1) The stamping performance of copper and copper alloys. Commonly used stamping copper and copper alloy materials include copper (that is, pure copper), brass, and bronze. The stamping properties of pure copper and H62 and H68 brass are good, and the cold work hardening of H62 is more severe than that of H68 under the same deformation conditions. Bronze has worse stamping performance than brass, and the performance difference between different grades is also greater. Because bronze is more severely hardened by cold work than brass, more intermediate annealing is required. (2) The stamping performance of aluminum and aluminum alloys commonly used stamping aluminum and aluminum alloys include pure aluminum, duralumin, rust-proof aluminum and forged aluminum. The strength of pure aluminum is very low, and it is seldom used in mechanical products. Duralumin, wrought aluminum and anti-rust aluminum are all aluminum alloys. They have good plasticity in the annealed state and are suitable for stamping processing. For aluminum alloys that can be strengthened by heat treatment, such as duralumin and forged aluminum, quenching can also be used to obtain higher plasticity and comprehensive mechanical properties that are beneficial to stamping. However, it is necessary to master the quenching heating temperature, if over-burning, it will seriously deteriorate the stamping performance of the alloy. After heat treatment and quenching, the strength of aluminum alloy will gradually increase with time, while the plasticity will decrease accordingly. This phenomenon is called aging strengthening. For aluminum alloys with aging strengthening characteristics, after the quenching treatment in the middle of multi-process stamping, the next stamping process must be carried out before the development of aging strengthening. Most anti-rust aluminum cold work hardening is more serious, when stamping complex parts, usually 1 to 3 times of intermediate annealing. Aluminum alloy stamping in a warm state can improve its stamping performance, but attention must be paid to the heating temperature and the use of heat-resistant lubricants. (3) Molybdenum and molybdenum alloys Molybdenum has high strength at room temperature, so it is not suitable for plastic deformation, and heating and stamping are often used in production. Pay attention to controlling the heating temperature when heating stamping. When the temperature is too low, the deformation resistance is too large. When the temperature is too high, molybdenum and molybdenum alloys are easy to oxidize. When stamping, attention should be paid to preheating the mold, using a lower stamping speed, and using heat-resistant lubricants. Because molybdenum and its alloys have greater resistance to stamping deformation, intermediate annealing is required in multi-process stamping to eliminate work hardening and internal stress. The intermediate annealing temperature is about 1000℃~1100℃. (4) Magnesium alloys Magnesium alloys have low plasticity at room temperature and better plasticity at higher temperatures, so heating stamping is generally used for magnesium alloys. The precautions for heating stamping are basically the same as those of aluminum and molybdenum. The mechanical properties of magnesium alloy sheets have significant directional differences, and the strength is very low under hot conditions, so the phenomenon of deep drawing and thinning is more serious. In addition, magnesium alloys are easy to 'burn' and catch fire when heated, so pay attention to safety during production. (5) Titanium and titanium alloys Titanium and titanium alloys have high strength, large deformation force, and strong cold work hardening. Except for a few grades used for stamping parts with little deformation, cold stamping is used, most of them use heating stamping . When stamping titanium and titanium alloys, the lowest possible stamping speed should be used. Previous post: What are the reasons for the uneven surface of the stamping parts and the concave arc surface? How to solve it?