摘要
Inconel 718合金螺栓为航空发动机中常用的高强度螺栓,通常采用滚压螺纹成型工艺。螺栓及螺纹的流线直接影响螺栓的质量和服役寿命,所以流线检测尤为重要。通过试验,发现将Inconel 718合金螺栓进行二次固溶+时效处理可使其晶粒长大和析出δ相(Ni3Nb),然后在HNO3+HF的溶液中浸蚀1h,可以清晰显示出Inconel 718合金螺栓和螺纹的流线。
Inconel 718 alloy bolts are a high strength bolts commonly used in the aeroengine,and they usually adopt rolled thread technology.The streamline of bolts and threads directly affects the quality and service life of the bolts,so streamline detection is particularly important.Through test,it is found that grain growth andδphase(Ni3 Nb)precipitation can be achieved by secondary solution and aging treatment of Inconel 718 alloy bolts.And then the streamline of Inconel 718 alloy bolts and threads can be clearly displayed by etching in HNO3+HF solution for 1 h.
作者
张俊
刘卫东
龚晓宁
ZHANG Jun;LIU Weidong;GONG Xiaoning(Metrology and Phys&Chem Testing Center,AECC Chengdu Engine Co.,Ltd.,Chengdu 610500,China)
出处
《理化检验（物理分册）》
CAS
2019年第9期626-629,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
