摘要
研究了Inconel X-750弹簧中夹杂物的显微形貌。结果表明,弹簧的化学成分满足Inconel X-750规范要求,微观组织主要有奥氏体＋强化相组成,其间均匀分布氮化钛和钛铌合金夹杂物。合金中夹杂物尺寸为10~15μm,大于夹杂物的临界尺寸5μm,易于成为弹簧疲劳裂纹的裂纹源。
The microstructures of the inclusions in Inconel X-750 spring were investigated.The results show that the chemical composition meets the requirements of the Inconel X-750.The microstructure of the spring is made of mainly austenite and strengthening phase,and the inclusions titanium nitride and Nb-Ti alloy distribute inside uniformly.The inclusion size in the alloy is 10~15 μm,which is larger than the critical size of the inclusion（5 μm）,so the inclusion region is easy to become the crack source of fatigue crack of the spring.
出处
《铸造技术》
CAS
北大核心
2015年第10期2432-2436,共5页
Foundry Technology
