Brass H62 hot extrusion of micro gear
Gears are very important and widely used driving components in mechanical instruments, and the demands of micro-gears are increasing more and more active as the MEMS technology develops in recent years. In this paper, a brass micro gear, which modulus m=0.125 mm, pressure angle α=20°, number of teeth z=6, addendum circle diameter d=1 mm, hot extruded from brass H62 billet with size Φ 3×3 at 650 ℃ was studied by experimental method. The microstructure of the micro gear was observed by scanning electron microscope and optical microscope, and the conclusions are as follows: the fiber flow lines within the micro-gear were formed by the extrusion, so that the anisotropic mechanical properties of the micro-gear was happened; The tissue distribution of micro-gear was that, the surface of the gear is almost entirely α -phase, while the internal part of the gear was the mixture of α -phase and β -phase, because the α -phase with lower hardness flowing outward to the surface of the gear during the extrusion process.
Xiangru LIU Xudong ZHOU
Physics College& Engineering College, Henan University of Science & Technology,Luo Yang, 471003, Chi Material Science & Engineering College, Henan University of Science & Technology, Luo Yang, 471003,
国际会议
桂林
英文
1-4
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）