Study on the Mechanism of Preparation of De-β-layered Gradient Cemented Carbide with Nitrogen-free Raw Material AITranslate
Abstract AITranslate
De-β-1ayered gradient cemented carbide was prepared by micro-pressure nitrification and vacuum denitrification sintering with nitrogen-free raw material. The microstructure and element distribution of al- loy samples at different sintering steps were analyzed by SEM, EDS and EPMA techniques, their micro- structure evolution rules during sintering were investigated,and the formation mechanisms of cubic carbide free layer and Co-rich layer were summarized. The results indicate that TiC phase in the cemented carbide is nitrided to Ti（C,N） phase during micro-pressure nitrification. And then the dissolution of Ti（C,N） into the liquid phase and the N-Ti coupling diffusion result in the formation of cubic carbide free layer during denitrification sintering. The combined action of Co vacancy diffusion and liquid migration is responsible for the formation of Co-rich layer. Liquid migration during cooling results in the difference of Co content in dif- ferent regions of Co-rich layer.
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DOI：
Chinese Library Classification Number:TF125.3[冶金工程—粉末冶金]
Citation Information:
De-β-1ayered gradient cemented carbide was prepared by micro-pressure nitrification and vacuum denitrification sintering with nitrogen-free raw material. The microstructure and element distribution of al- loy samples at different sintering steps were analyzed by SEM, EDS and EPMA techniques, their micro- structure evolution rules during sintering were investigated,and the formation mechanisms of cubic carbide free layer and Co-rich layer were summarized. The results indicate that TiC phase in the cemented carbide is nitrided to Ti（C,N） phase during micro-pressure nitrification. And then the dissolution of Ti（C,N） into the liquid phase and the N-Ti coupling diffusion result in the formation of cubic carbide free layer during denitrification sintering. The combined action of Co vacancy diffusion and liquid migration is responsible for the formation of Co-rich layer. Liquid migration during cooling results in the difference of Co content in dif- ferent regions of Co-rich layer.
quote
| GB/T 7714-2015 | [1] YANG Jin-wei, SHI Liu-yong, ZHOU Teng, et al. Study on the Mechanism of Preparation of De-β-layered Gradient Cemented Carbide with Nitrogen-free Raw Material[J]. Rare Metals and Cemented Carbides, 2017(4): 76-81. |
| MLA | [1] YANG Jin-wei, et al., "Study on the Mechanism of Preparation of De-β-layered Gradient Cemented Carbide with Nitrogen-free Raw Material." Rare Metals and Cemented Carbides, no. 4, 2017, pp. 76-81. |
| APA | [1] YANG Jin-wei, SHI Liu-yong, ZHOU Teng, ZHANG Xian-man, & LUO Hong-feng. (2017). Study on the Mechanism of Preparation of De-β-layered Gradient Cemented Carbide with Nitrogen-free Raw Material. Rare Metals and Cemented Carbides(4), 76-81. |
| IEEE | [1] YANG Jin-wei, SHI Liu-yong, ZHOU Teng, ZHANG Xian-man, and LUO Hong-feng, "Study on the Mechanism of Preparation of De-β-layered Gradient Cemented Carbide with Nitrogen-free Raw Material," Rare Metals and Cemented Carbides, no. 4, pp. 76-81, 2017. keywords: {gradient cemented carbide;nitrogen-free raw material;cubic carbide free layer;Co-rich layer;for- mation mechanism} |