Inconel718合金中δ相的溶解行为  

Dissolution Behavior of Phase δ in Inconel 718

作　　者：蔡大勇[1] 张伟红[1] 刘文昌[1] 姚枚[1] 孙贵东[2] 陈宗霖[2] 王少刚[2] 高玉魁 

机构地区：[1]燕山大学材料科学与工程学院,河北秦皇岛066004 [2]沈阳黎明航空发动机集团公司技术中心,辽宁沈阳110000 [3]北京航空材料研究院 室,北京100095

出　　处：《钢铁研究学报》2002年第6期61-64,共4页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(59971039)

摘　　要：用金相显微镜及X线衍射技术研究了Inconel718合金中δ相在不同温度下的溶解行为。结果发现:在980℃、1000℃、1020℃保温过程中,合金中δ相的含量逐渐降低,且形状由长针状变为短棒状或颗粒状;1020℃保温2h后δ相可完全溶入基体;980℃、1000℃保温时,δ相的平衡含量分别约为3%及0.6%;保温开始阶段,δ相的溶解速度较快并近似为常数。随着保温时间的延长,溶解速度逐渐降低,980℃保温30min及1000℃保温2h后,δ相的溶解速度趋于零。The dissolution behavior of phase δ in Inconel 718 at different temperatures was studied by optical microscopy and Xray diffraction (XRD) techniques. The results showed that the morphology of phase δ changes from long needle shape to short bars and particles gradually with the decrease of phase δ content during the holding at 980 ℃, 1 000 ℃ and 1 020 ℃. The phase δ will fully dissolve into the austenitic matrix by holding at 1 020 ℃ more than 2 h, and the equilibrium content of phase δ at 980 ℃ and 1 000 ℃ is 3 % and 0.6 % respectively. The dissolution rate has a large value and is nearly a constant at the beginning, and then decreases gradually with the increase of holding time. A dynamic equilibrium is reached by holding at 980 ℃ more than 30 min and at 1 000 ℃ more than 2 h, with a dissolution rate nearing to zero.

关 键 词：INCONEL718合金 Δ相 溶解 扩散 

分 类 号：TG132.3[一般工业技术—材料科学与工程]