| 引用本文: | 刘蓓蕾,余竹焕,王盼航.碳对镍基高温合金AM3热腐蚀性能的影响[J].材料科学与工艺,2020,28(1):91-96.DOI:10.11951/j.issn.1005-0299.20180369. |
| LIU Beilei,YU Zhuhuan,WANG Panhang.Effect of carbon on the hot corrosion of Ni-based superalloy AM3[J].Materials Science and Technology,2020,28(1):91-96.DOI:10.11951/j.issn.1005-0299.20180369. |
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| 摘要: |
| 为了更充分地了解碳对镍基高温合金热腐蚀性能的影响,提高合金的耐热腐蚀性能,本文研究了不同碳含量镍基高温合金AM3在850 ℃条件下, 经75%Na2SO4+25%NaCl饱和混合盐溶液热腐蚀5 h的行为。利用扫描电镜(SEM)、X射线衍射(XRD)等测试方法分析了合金热腐蚀后的组织形貌和腐蚀产物。研究表明, 腐蚀5 h过程中,碳含量(质量分数)为0、0.045%、0.15%的合金持续增重,碳含量为0.085%的合金在2～4 h发生氧化膜与盐膜的碱性熔融,有失重现象存在。合金加入碳后,促使合金表层腐蚀层变薄且与基体结合力变好。含碳的镍基高温合金腐蚀层产物以氧化物为主,主要有NiO、TiO2、Al2O3、Cr2O3。碳含量(质量分数)为0.085%、0.15%的合金由于腐蚀层氧化物较薄,可检测到Al4CrNi15、Ni3Al相的存在。综合分析发现碳含量为0.085%时,合金耐热腐蚀性能达到最优。 |
| 关键词: 镍基高温合金 AM3 C含量 耐热腐蚀性能 Na2SO4-NaCl |
| DOI：10.11951/j.issn.1005-0299.20180369 |
| 分类号:TG174.31 |
| 文献标识码:A |
| 基金项目:西安科技大学优秀青年科技基金项目(2018YQ2-12)；凝固技术国家重点实验室开放课题(SKLSP201846)；陕西省留学人员科技活动择优资助项目(2018047). |
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| Effect of carbon on the hot corrosion of Ni-based superalloy AM3 |
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LIU Beilei, YU Zhuhuan, WANG Panhang
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(College of Material Science and Engineering, Xi′an University of Science and Technology, Xi′an710054, China)
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| Abstract: |
| In order to better understand the effect of carbon on the hot corrosion properties of nickel-based crystal superalloys and improve their hot-resistant corrosion properties, the behavior of Ni-based superalloy AM3 with different carbon (C) content was studied, which were sat in 75%Na2SO4+25%NaCl saturated mixed salt solution for 5 hours at 850 ℃. The topography of microstructure and corrosion products of the alloys were investigated by means of SEM, X-ray diffraction (XRD). Results show that during 5 hours of corrosion, the weight of alloys with C content of 0, 0.045 and 0.15 (wt%) increased continuously, while alkaline melting of oxide film and salt film occurred in the alloy with C content of 0.085 (wt%) between the 2nd and the 4th hour, and weightlessness phenomenon also appeared. After adding C to the alloys, the corrosion layers of the alloys surface were thinned and the bonding force with the matrix became better. The corrosion layer products of carbon-containing nickel-base superalloy were mainly oxides, such as NiO, TiO2, Al2O3, and Cr2O3. Al4CrNi15 and Ni3Al phases could be detected in the alloys with C content of 0.085 and 0.15 (wt%) due to their thinner oxide on the corrosion layer. When the C content was 0.085(wt%), the hot-resisting corrosion of the alloy were optimized. |
| Key words: Ni-based superalloy AM3 C content hot-resistant corrosion properties Na2SO4-NaCl |
