Explanation

The process of forging powder perform or sintered bodies into complex shapes in a closed die after being heated to a high temperature (forging temperature) that is easy to deform. It can eliminate the residual pores in sintering body and obtain powder metallurgy parts with 100% relative density. The existence of pores in the powder perform has a good effect on reducing the forging resistance, so the forging deformation is good. The pores in the powder preform are almost all filled with metal during forging. After sintering the powder compact in H2 furnace, adjust the furnace temperature to the forging temperature, take out the red hot sintering body and put it into the closed mold, and apply impact pressure to become power forging; The sintering body is heated (induction heating is the best) to the forging temperature for forging, which is called sintering forging; When atomizing the powder, the forging die is used as the powder collector to apply the impact force to the red hot powder into the mold, which is called Osprey forging. Osprey method is the most energy-saving, followed by power forging, but sintering forging also saves energy than metal forging. The power forging technology can form products at one time, and the cost depends on the service life of the mold. The cost is much lower than that of the machining process. Although power forging is more labor-saving than metal forging, it still needs large forging machines, such as high-speed hammer and friction press, so the size of parts is limited. power forging parts are mostly used in high load parts, such as rear car gears, which are products with harsh working conditions. If the preformed powder sintered body is heated to about 1200 ° C and forged by the friction press, the metal parts with gear shape can be obtained. power forging has been developed as a powder metallurgy method to produce high-strength parts, and is an important new technology to obtain full density materials.

Classification