热轧态Inconel690合金中碳化物的溶解和析出

材料研究学报

2009, Vol. 23

Issue (6): 668-672

研究论文

本期目录 | 过刊浏览

热轧态Inconel690合金中碳化物的溶解和析出

郝宪朝; 陈波; 马颖澈; 高明; 刘奎

中国科学院金属研究所~~沈阳~110016

Dissolution and precipitation of carbide in hot-rolled Inconel alloy 690

HAO Xianchao; CHEN Bo; MA Yingche; GAO Ming; LIU Ku

Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110016

引用本文:

郝宪朝陈波马颖澈高明刘奎. 热轧态Inconel690合金中碳化物的溶解和析出[J]. 材料研究学报, 2009, 23(6): 668-672.
. Dissolution and precipitation of carbide in hot-rolled Inconel alloy 690[J]. Chin J Mater Res, 2009, 23(6): 668-672.

全文: PDF(1178 KB)

摘要:

采用扫描电镜研究热轧态690合金碳化物的溶解和析出行为，透射电子显微镜分析碳化物结构。结果表明：热轧态合金中存在的碳化物多数沿晶界长条状分布，少量呈颗粒状分布于晶内，类型为M23C6。热轧态合金晶界、晶内碳化物的完全固溶温度分别为1050oC、1080oC。低固溶温度下未完全溶解的残余晶界碳化物直接导致后续TT处理晶界不再析出碳化物；而合金经完全固溶处理后，后续TT处理晶界会重新析出细小、半连续的碳化物。

关键词 ：金属材料 , Inconel690合金 , 固溶处理 , TT处理 , 碳化物

Abstract：

The behavior of carbide dissolution and precipitation in hot-rolled Inconel690 has been investigated by means of scanning electron microscopy. Transmission electron microscopy was employed to determine the type of carbide. The results show that more strip like carbide precipitates, identified as M23C6, distribute along grain boundaries in hot-rolled alloy 690 bars, and only few discrete particles present in the matrix. Dissolution temperatures of intergranular and intragranular carbides are 1050 and 1080, respectively. The carbide particles in hot-rolled bar could not fully dissolve and some still existed at grain boundaries for low solution temperature, then these remained carbide particles really hindered the new carbide re-precipitation during the following thermal treatment at 715 . However, to the clean grain boundaries after the carbides are fully dissolved at higher solution temperature, the newly fine and semi-continuous carbide precipitates can formed along the grain boundaries after following thermal treating.

Key words： metallic materials Inconel alloy 690 solution treatment thermal treatment carbide

收稿日期: 2009-04-02

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