液态模锻6061铝合金轮毂组织及性能

采用液态模锻成型时,为了研究铝合金轮毂不同部位的微观组织和力学性能,利用金相显微镜和拉伸试验机对液态模锻6061铝合金轮毂不同部位的组织及性能进行了研究.结果表明:外轮缘处晶粒最细小,而轮辐部位的晶粒最粗大;外轮缘的抗拉强度和伸长率最高,可以分别达到371 MPa和16%,轮辐部位的抗拉强度强度和伸长率最低,分别为346 MPa和9%.轮辋处的合金晶粒大小不一,且部分晶粒被拉长变形,这是由于该处糊状金属流动产生的冲刷和挤压所致.

Microstructure and properties of wheel hub prepared with liquid die forged 6061 aluminum alloy

In order to study the microstructure and mechanical properties of different parts of wheel hub prepared with aluminum alloy through liquid die forging, the microstructures and properties of different parts of wheel hub prepared with liquid die forged 6061 aluminum alloy were studied by both metallographic microscope and tensile testing machine. The results show that the grain size at the outer rim is the smallest, and the grain size at the spoke is the coarsest. The tensile strength and elongation at outer rim are the highest, reaching 371 MPa and 16%, respectively. In addition, the tensile strength and elongation of spoke part are the lowest, reaching 346 MPa and 9%, respectively. The grain sizes of aluminum alloy at the rim are not uniform, and some grains are elongated and deformed, due to the flushing and extrusion caused by the metal flowing in mushy zone.