Applicability of fine particle peening on surface modification of aluminum alloy
Applicability of fine particle peening on surface modification of aluminum alloy
复制标题
细颗粒喷丸在铝合金表面改性中的应用
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Toshimitsu Endo
中科院分区：
文献类型：
--
作者：
M. Ando;H. Kitano;H. Usami;Toshimitsu Endo
采用细颗粒喷丸技术对硬化铝合金进行表面改性.冲击介质为石英玻璃、氧化锆、钢和粉煤灰。直径为50 m的激光器用加压气体加速以撞击目标表面。测量了表面形貌、元素分布和显微硬度。因此，优化喷丸条件，如处理时间和气体压力需要增加硬度和表面粗糙度增加与气体压力的增加时，使用石英玻璃和氧化锆。结果发现，较小的粉煤灰颗粒导致破碎的粘性颗粒迁移到表面，硬度的增加是大于所获得的石英玻璃和氧化锆。在细钢颗粒冲击的情况下，由于钢颗粒向铝表面的迁移，使铝表面的硬度显著提高，因此可以认为，冲击颗粒的迁移和迁移是提高铝表面硬度的有效途径。
The present study describes the hardening aluminum alloy modified by fine particle shot peening. The impact media were silica glass, zirconia, steel and fly-ash. Having 50 m in diameter was accelerated with pressurized gas to collide against the target surface. Surface profile, element distribution and micro hardness were measured. As a result, optimizing of the peening condition such as treatment time and gas pressure required an increase in hardness and surface roughness increased with an increase in gas pressure when silica glass and zirconia were used. It was found that the smaller fly-ash particles resulted in crush of the cohesive particles was migrated into the surface and that an increase of the hardness was larger than what was obtained with silica glass and zirconia. In the case of fine steel particle peening, a significant increase of hardness caused by transfer of the steel to aluminum surface was found. Therefore, it was concluded that transfer and migration of the impact particles was effective to increase in hardness of the aluminum surface.