C对一种镍基高温合金与陶瓷型壳界面反应及润湿性的影响*
录用日期: 2015-03-26
网络出版日期: 2015-04-08
基金资助
* 国家自然科学基金项目51271186, 51331005和11332010, 以及国家高技术研究发展计划项目2014AA041701资助
EFFECT OF C ON THE INTERFACIAL REACTION AND WETTABILITY BETWEEN A Ni-BASED SUPERALLOY AND CERAMIC MOULD
Accepted date: 2015-03-26
Online published: 2015-04-08
Supported by
Supported by National Natural Science Foundation of China (Nos.51271186, 51331005 and 11332010) and High Technology Research and Development Program of China (No.2014AA041701)
陈晓燕,金喆,白雪峰,周亦胄,金涛,孙晓峰 . C对一种镍基高温合金与陶瓷型壳界面反应及润湿性的影响*[J]. 金属学报, 2015 , 51(7) : 853 -858 . DOI: 10.11900/0412.1961.2015.00007
Superalloy components are always produced by the way of investment casing. During investment casting, interfacial reactions may take place and bring about metal contamination and defect formation on the surface of the components. The influence of C content on the interfacial reaction and wettability between a Ni-based superalloy and ceramic mould was investigated by using a sessile drop method. The interfacial morphology and elements distribution were studied by SEM and EPMA. Activities of C, Cr and Al were calculated by using Thermo-Calc software. The relationship between interfacial reaction and wettability was discussed. It was found that when C content was higher than 0.1%, activity of C increased greatly and interfacial reaction took place. The wettability varied from non-reactive wetting to reactive wetting. In the reactive wetting systems, sand adhesions appeared and Al and Cr diffused to the ceramic surface.
Key words： superalloy; ceramic mould; interfacial reaction; wettability; activity; C
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