论文部分内容阅读
对Mg-Mn-RE合金进行挤压和锻造变形处理,研究不同变形方式对其显微组织及力学性能的影响。结果表明:合金挤压变形过程中发生了动态再结晶,晶粒明显细化,挤压变形后硬度、抗拉强度、屈服强度和伸长率相对于铸态都有所提高,分别为68HV、254.9 MPa、190.5 MPa和26%;室温锻造变形后,晶粒扭曲变形,稀土化合物呈弥散均匀分布,硬度相对于挤压变形后有所提高,相对变形量为28%时,合金硬度为101 HV。
The deformation and deformation of Mg-Mn-RE alloy were investigated by extrusion and forging. The effects of different deformation modes on the microstructure and mechanical properties were studied. The results show that dynamic recrystallization and grain refinement occur during the extrusion deformation of the alloy. The hardness, tensile strength, yield strength and elongation after extrusion are all increased compared with the as-cast state, which are respectively 68HV and 254.9 MPa, 190.5 MPa and 26% respectively. After forging deformation at room temperature, the grains distorted and the rare earth compounds were dispersed and dispersed uniformly. The hardness increased with extrusion deformation. When the relative deformation was 28%, the alloy hardness was 101 HV.