Processo de forjamento utilizando a liga de magnésio ZK60

Abstract

In the engineering field, it is increasingly sought materials with a good strength -weight ratio, which allows a better performance in its application and gain in energy efficiency. Magnesium has been showing to be a material that meet this need, especially because there are many resources on the Earth’s crust and in the ocean. Several magnesium alloys have been developed aiming at better mechanical properties compared to pure magnesium. In this work, a forging process was made using a manual press using a magnesium alloy ZK60. The samples were forged under different temperatures. Using a graphic method, it was possible to estimate the forge pressure exerted by the manual press, with values ranging from 35 to 67 MPa and deformations from 0.043 to 0.191. It was observed that as the temperature chosen for the forge increased, the hardness obtained in the sample decreased. The hardness values of the samples ranged from 58 to 68 on the Vickers scale, none of the samples exceeded the original material in the matter of hardness. Through the optical microscopy it was possible to verify evidences of recrystallization as the forge temperature increased.