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Transient liquid-phase bonding of superalloy k465 using a Ni-Cr-Fe-B-Si amorphous interlayer alloy

Rare Metals 2020年第4期39卷 408-412页

作者： Ji-De Liu Bo Li Yuan Sun Tao Jin Xiao-Feng Sun Zhuang-Qi Hu Department of Superalloys Institute of Metal ResearchChinese Academy of ScienceShenyang 110016China

A kind of Ni-Cr-Fe-B-Si system amorphous alloy was used as interlayer in transient liquid-phase bonding(TLP bonding)of polycrystalline superalloy *** bonding behavior,microstructure feature and the tensile properties of the joints were *** are B-rich phase and Si-rich phase formed in the center of the seam after bonding at 1210℃for 30 *** isothermal solidification is complete after bonding at 1210℃for 4 *** relationship of the average width of the remnant eutectic zone and bonding time at 1210℃is *** tensile strength of the bonded joint at room temperature and 900℃is comparable to that of k465 alloy.

关键词： Interlayer alloy Transient liquid-phase bonding Superalloy k465 alloy

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Complicated hollow turbine blades and surface grain refinement process

引用

China Foundry 2010年第2期7卷 121-126页

作者： Peng Zhijiang Jia Shuqin Zhang Zehai Liu Yan AVIC Shenyang Liming Aero-Engine （Group） Corporation Ltd Shenyang 110043 Shenyang Research Institute of Foundry Shenyang 110022 China

The control of grain size in superalloys is critical in the manufacture of gas turbine *** aim of the present research is to provide the technology for producing complicated hollow turbine blades with fine surface grains and better comprehensive mechanical *** melt superheating treatment and coating the internal surfaces of shell mould using a cobalt aluminate-bearing coating material,the in-uence of cobalt aluminate as inoculant on the surface grain sizes of turbine blade was studied with addition of cobalt aluminate:0,35%,45%-65% and 100% *** the same time,the effects of cooling circumstances of the blades on surface grain sizes were also experimented under the same addition of cobalt *** results showed that the melt superheating treatment plays a significant role in the grain size and carbide morphology;and fine surface grains were obtained when the internal surfaces of shell mould were coated using cobalt aluminate *** the addition of cobalt aluminate in coating is between 45%-65%,and the melt is poured into preheated shell moulds with fine silica sand as backing sand,the blades satisfied the surface grain size requirement is over 90%.In addition,comparisons of the surface grain size and the mechanical properties were also conducted between home-made and foreign-made blades.

关键词： complicated hollow turbine blades k465 alloy surface grain refinement melt superheating treatment

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