| Application: | Industrial |
|---|---|
| Standard: | GB, ASTM |
| Purity: | >99.5% |
| Alloy: | Alloy |
| Powder: | Not Powder |
| Transport Package: | Wooden |
| Customization: |
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Audited Supplier GH105 Overview
GH105 is a highly alloyed aging-strengthened nickel-based deformed superalloy with high strength, poor hot workability and weldability. It mainly supplies hot-rolled bars, flat bars, and cold-drawn bars, which are used to manufacture high-temperature components such as aero-engine turbine blades and high-temperature bolts. The working temperature is 750-950ºC.
GH105 Chemical Composition
Carbon C0.12-0.17
Silicon Si≤0.25
Manganese Mn≤0.4
Phosphorus P≤0.015
Sulfur S≤0.01
Chromium Cr14-15.7
Nickel Ni Balance
Cobalt Co14-15.7
Copper Cu≤0.2
Iron Fe≤1
Boron B0.003-0.01
Titanium Ti 1.18-1.5
Aluminum Al 4.5-5.5
Ce Ce≤0.01
GH105 Formability
(1) Rolling and drawing
The charging temperature of the ingot shall not be higher than 800°C, the heating temperature shall be 1150-1170°C, the rolling temperature shall not be lower than 1090°C, and the final rolling temperature shall be not lower than 1060°C. The drawing temperature of the cold drawn bar is 600°C.
(2) Forging of turbine blades
The blanks for turbine blades should be sprayed with protective lubricant according to the specified process requirements, and can be heated in the furnace after drying. The blank of the part is loaded in the electric furnace at a temperature of 800 °C ± 10 ° C, kept for 60 minutes, heated at a temperature of 1150 ° C ± 10 ° C, and kept for 30 minutes. After upsetting, blast sand on the blank of the parts, and then spray protective lubricant according to the specified process requirements. After drying, install the furnace, heat and keep warm according to the above regulations, perform final forging on a crank press, and lubricate with molybdenum disulfide. Die bore.
GH105 welding performance
GH105 can be welded, but micro-cracks are prone to occur in the heat-affected zone. It is not suitable to use tungsten inert gas shielded welding and metal electrode inert gas shielded welding. The flash butt welding effect of the alloy is quite satisfactory. High temperature (not more than 1150ºC) brazing of GH105 in vacuum, liquefied hydrogen medium or inert gas also has satisfactory results.
GH105 parts heat treatment process
The heat treatment process of the parts is carried out according to the heat treatment system of the corresponding material technical standards. For the local work hardening of the blade in the manufacturing process after solutionization (before aging), argon or hydrogen protection surface annealing shall be carried out according to the specified requirements. The annealing temperature is 1020-1040°C.
Analysis of thermally induced cracks in GH105 cold drawn rod
(1) After cold drawing, there is a broken crystal layer on the surface of GH105 cold drawn rod, and there are a certain number of microscopic cracks in the broken crystal layer. There are a large number of slip lines inside the cold drawn rod, and the slip line density gradually decreases from the surface to the core, that is, the degree of deformation from the surface to the core gradually decreases.
(2) The GH105 cold-drawn rod produces serious macroscopic cracks during the heat treatment process. The fractured crystal layer on the surface of the cold-drawn rod and the microcracks inside are the origin of the heat-treated macroscopic cracks.
(3) Removing the broken grain layer is an effective method to eliminate heat treatment cracks of GH105 cold drawn rods. Surface removal of more than 0.5mm can ensure no heat treatment cracks.
GH105 Long-term tissue stability
(1) When the GH105 alloy is isothermally aged at 850 °C for 1000 hr, the γ' phase and grain boundary carbides are enriched and grown, the number of carbides increases, the number of γ' phase decreases slightly, the permanent plasticity of the alloy decreases, and the permanent life is stable. .
(2) GH105 does not precipitate TCP phase when the temperature is higher than 850 °C, but as the temperature decreases to below 850 °C, the alloy has thermodynamic conditions for the precipitation of μ and σ phases. Therefore, when the alloy is aged below 850 °C, it will be possible. The TCP phase is precipitated; the content of Al and Ti is not only proportional to the solid solution temperature and precipitation amount of the phase in the alloy, but also proportional to the solid solution temperature of the μ and σ phases.
The above is the introduction of GH105 nickel-based deformed superalloy material. updates alloy information on a daily basis. Welcome everyone to advise and exchange.
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