Single crystal nickel-base high-temperature alloy and aero-engine turbine part

• Main Authors: ZHANG JIANTING, YAO JIAN, LONG ANPING
• Format: Patent
• Language: Chinese; English
• Published: 16.04.2019
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; ALLOYS; APPARATUS THEREFOR; CHEMISTRY; CRYSTAL GROWTH; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; TREATMENT OF ALLOYS OR NON-FERROUS METALS; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

The invention relates to the technical field of high-temperature alloys, and discloses a single crystal nickel-base high-temperature alloy and an aero-engine turbine part. The single crystal nickel-base high-temperature alloy is prepared from the components in percentage by mass: 3 to 4 percent of Cr, 5.5 to 6.5 percent of Co, 0.3 to 0.5 percent of Mo, 6 to 7 percent of W, 6.5 to 7.5 percent of Ta, 0.08 to 0.12 percent of Hf, 5 to 6 percent of Al, 4.7 to 5.3 percent of Ru, 6.1 to 6.7 percent of Re, and the balance Ni and inevitable impurities. Compared with typical fifth-generation single crystal alloys TMS173 and TMS196, through increasing the contents of the Co, the W and the Ta, the solid solution capacity, the heat intensity and the castability of the high-temperature alloy are improved; through reducing the content of the Mo, the heat stability of the high-temperature alloy is improved, and the separation of a TCP phase is reduced; through controlling the content of the Cr to be between the TMS173 and th