利用喷丸再结晶方法提高K417合金的疲劳寿命  

Fatigue-Life Improvement of K417 Alloy by Shot Peening and Recrystallization

作　　者：王东林[1] 李家宝[1] 金涛[1] 魏政[2] 胡壮麒[1] 付立群[2] 刘世锋[3] 

机构地区：[1]中国科学院金属研究所,辽宁沈阳110016 [2]沈阳黎明航空发动机(集团)有限责任公司,辽宁沈阳110043 [3]沈阳职业技术学院,辽宁沈阳110043

出　　处：《稀有金属材料与工程》2006年第8期1294-1298,共5页Rare Metal Materials and Engineering

摘　　要：K417镍基高温合金是我国广泛应用于制造航空发动机涡轮叶片的材料。研究了采用喷丸再结晶方法提高K417合金疲劳寿命的可行性。实验结果表明,该方法可以有效提高K417合金在650℃大气条件下的疲劳寿命。利用扫描电镜对试样断口进行了观察和分析,并对疲劳寿命提高机制进行了讨论。K417 Ni-base superalloy is extensively used as the material of turbine blade of aeroengine. The feasibility of improving K417 fatigue life by surface shot peening and recrystallization was studied. The result shows that the fatigue life under the condition of 650℃ atmosphere is effectively enhanced by surface shot peening and recrystallization. The fractographs of specimen are analyzed by SEM, and the mechanism of fatigue life improvement is discussed.

关 键 词：K417合金 喷丸 再结晶 疲劳寿命 

分 类 号：TG179[金属学及工艺—金属表面处理]