喷丸尺寸对GH4169表层湿喷丸组织与性能的影响

Effectsof Projectile Size on Microstructure and Properties of GH4169 Surface by Wet Shot Peening

利用湿喷丸对GH4169合金进行表面处理,研究了不同喷丸直径(1、2、4mm)对合金表面形貌、表层显微组织、表面粗糙度和显微硬度的影响。结果表明,随着喷丸直径增加,合金表面完整性降低,而喷丸作用层厚度、显微硬度、表面粗糙度都随之增加。当喷丸直径为4mm、作用时间为5min时,喷丸作用层厚度和表面显微硬度(HV)最大,分别为320μm和356。

The surface of GH4169 alloy was treated by wet shot peening,and effects of shot peening projectile size on the surface morphology,microstructure,roughness and micro-hardness of GH4169 alloys were investigated.The results show that the surface integrity of the alloy is decreased with the increase of the projectile size,while the shot peening layer,the microhardness and the surface roughness are increased.With 4 mm wet shot peening for 5 min,the shot peening effect layer and surface micro-hardness reach 320μm and 356 HV,respectively.