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主管单位 中华人民共和国
工业和信息化部
主办单位 中国材料研究学会
哈尔滨工业大学
主编 苑世剑 国际刊号ISSN 1005-0299 国内刊号CN 23-1345/TB

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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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碳对镍基高温合金AM3热腐蚀性能的影响
刘蓓蕾,余竹焕,王盼航
(西安科技大学 材料科学与工程学院,西安 710054)
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).
Effect of carbon on the hot corrosion of Ni-based superalloy AM3
LIU Beilei, YU Zhuhuan, WANG Panhang
(College of Material Science and Engineering, Xi′an University of Science and Technology, Xi′an710054, China)
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

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