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朱孜毅,孟利,陈冷.Co-Cr-W-Ni合金中碳化物析出机制的研究[J].稀有金属材料与工程(英文),2019,48(9):2893~2898.[Zhu Ziyi,Meng Li and Chen Leng.Study on the Mechanism of Carbide Precipitation in Co-Cr-W-Ni Alloy[J].Rare Metal Materials and Engineering,2019,48(9):2893~2898.]
Study on the Mechanism of Carbide Precipitation in Co-Cr-W-Ni Alloy
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Received:April 16, 2018??Revised:May 14, 2018
Key words:?Co-Cr-W-Ni??carbides??type??precipitation
Foundation item:国家重点研发计划资助(项目号2017YFA0403804)
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Zhu Ziyi,Meng Li and Chen Leng??
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??????The Type and Precipitation Mechanism of Carbide in Co-Cr-W-Ni Alloy have significant influence on the mechanical properties of alloy.Therefore, the precipitation type, distribution characteristics and precipitation mechanism of carbides after aging of Co-Cr-W-Ni alloy were studied in this work. The ageing samples were observed by XRD, scanning electron microscopy and transmission electron microscopy. The experimental results show that the types of carbides are M7C3, M6C and M23C6. M23C6 carbide preferentially precipitates at grain and twin boundaries with a cube-cube orientation relationship with the matrix. The M7C3 carbide decomposed gradually with the M6C carbide precipitating in situ is an important mechanism of carbide precipitation.