论文部分内容阅读
使用薄膜TEM直接观察了成分相近热处理制度不同的两个炉号GH36合金的基本组织,使用SAD和DF技术做物相分析。结果表明,合金经正常热处理后析出细小弥散分布的VC,尺寸约在2nm～12nm,还有M_(23)C_6和N_6C、其中VC和M_(23)C_6与合金基体的取向关系是[011]_(vc)∥[011]_M∥[011]M_(23)C6,(111)_(VC)∥(111)_M∥(111)M_(23)C_6,(200)_(VC)∥(200)_M∥(200)M_(23)C6,通过补充时效后合金中VC颗粒聚集长大,晶界析出的M_(23)C_6更多,这种组织及晶界状态有利于改善合金的持久缺口敏感性。
The basic structure of GH36 alloy with different heat treatment compositions with different compositions was directly observed by TEM. Phase analysis was performed using SAD and DF techniques. The results show that the finely dispersed VC is precipitated after normal heat treatment and the size is about 2nm ~ 12nm. There are M_ (23) C_6 and N_6C. The orientation relationship between VC and M_ (23) C_6 and the matrix is [011] _ (vc) // [011] _M // [011] M_ (23) C6, (111) _ (VC) // (111) _M∥ (111) M_ (23) C_6, (200) _ (VC) // 200) _M // (200) M_ (23) C6. The M_ (23) C_6 precipitated more in the grain boundary after the aging of the VC particles in the aging treatment, which is beneficial to the long lasting Gap sensitivity.