The hot-corrosion resistant superalloys have been widely applied in the gas turbines for power generation industry,the marine gas turbines in the aircraft carrier and missile destroyer as well as the aeroengines in sh...The hot-corrosion resistant superalloys have been widely applied in the gas turbines for power generation industry,the marine gas turbines in the aircraft carrier and missile destroyer as well as the aeroengines in shipboard aircraft and offshore fighter plane.Based on the ten kinds of hot-corrosion superalloys that were developed by the authors in the recent 10 years,the paper has reviewed the status and development of hot-corrosion resistant superalloys in domestic and overseas.The characteristics of chemical composition, microstructure,mechanical properties and manufacturing process are analyzed emphatically.Simultaneously the applications of hot-corrosion resistant superalloys are introduced as well.展开更多
Nickel-based superalloys with and without Co by partial replacement of W were prepared using double vacuum melting.A comparison of the oxidation in air and hot corrosion behaviors under molten 75 wt.%Na2 SO4+25 wt.%Na...Nickel-based superalloys with and without Co by partial replacement of W were prepared using double vacuum melting.A comparison of the oxidation in air and hot corrosion behaviors under molten 75 wt.%Na2 SO4+25 wt.%NaCl at 900℃were systematically investigated.The results showed that partial replacement of W with Co promoted the formation of chromia scale and consequently decreased the oxidation rate.Besides,the addition of Co also retarded the internal oxidation/nitridation of Al and consequently promoted the growth of Al_(2) O3 scale,which further decreased the scaling rate and improved the adhesion of scale.Moreover,the addition of Co also further improved the hot corrosion resistance under molten Na2 SO4-NaCl salts.展开更多
文摘The hot-corrosion resistant superalloys have been widely applied in the gas turbines for power generation industry,the marine gas turbines in the aircraft carrier and missile destroyer as well as the aeroengines in shipboard aircraft and offshore fighter plane.Based on the ten kinds of hot-corrosion superalloys that were developed by the authors in the recent 10 years,the paper has reviewed the status and development of hot-corrosion resistant superalloys in domestic and overseas.The characteristics of chemical composition, microstructure,mechanical properties and manufacturing process are analyzed emphatically.Simultaneously the applications of hot-corrosion resistant superalloys are introduced as well.
基金financial supports from the Natural Science Foundation of Shandong Province,China(No.ZR2019MEE107)Shandong Jiaotong University“Climbing”Research Innovation Team Program,China(No.SDJTC1802)PhD Scientific Research Foundation of Shandong Jiaotong University,China(No.BS2018005)。
文摘Nickel-based superalloys with and without Co by partial replacement of W were prepared using double vacuum melting.A comparison of the oxidation in air and hot corrosion behaviors under molten 75 wt.%Na2 SO4+25 wt.%NaCl at 900℃were systematically investigated.The results showed that partial replacement of W with Co promoted the formation of chromia scale and consequently decreased the oxidation rate.Besides,the addition of Co also retarded the internal oxidation/nitridation of Al and consequently promoted the growth of Al_(2) O3 scale,which further decreased the scaling rate and improved the adhesion of scale.Moreover,the addition of Co also further improved the hot corrosion resistance under molten Na2 SO4-NaCl salts.
