| Application: | Industrial |
|---|---|
| Standard: | GB, ASTM |
| Purity: | >99.5% |
| Alloy: | Alloy |
| Powder: | Not Powder |
| Transport Package: | Wooden |
| Customization: |
|---|
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1.1, material grade
GH93
1.2, similar grades
Nimonic93 (UK), NCK2OTA (France)
technical standard
C3S 163-1985 "GH93 Alloy Hot Rolled and Forged Bars" (Great Wall Steel Plant No. 3)
C3S 164-1985 "GH93 Alloy Cold Rolled Sheet" (The Third Branch of Great Wall Steel Works)
chemical composition
Table 1-1
C Cr Ni Co Al Ti
≤0.13 18.0~21.0 margin 15.0~21.0 1.0~2.0 2.0~3.0
Mn Si P S Pb B Cu Fe
≤1.0 ≤0.8 ≤0.015 ≤0.015 ≤0.0025 ≤0.02 ≤0.2 ≤1.0
Note: B is added according to the calculated amount, and trace amounts of Ce, Zr and Mg are allowed to be added.
cold heat treatment
1050~1080ºC, 8h, air cooling +710ºC±10ºC, 16h, air cooling.
Species
We can supply d20~22mm hot-rolled bars, δ0.4~4mm plates, forgings and forgings below d120mm, the plates are delivered in solution state, and other varieties are delivered in forged and rolled states.
casting process
Vacuum induction melting plus vacuum arc or electroslag remelting process.
Applications
Aero-engine parts made of this alloy are used in the United Kingdom and France, and are used in China to manufacture free turbines, gaskets, washers, lock plates, etc.
Physical and chemical properties edit broadcast
2.1. Thermal performance
2.1.1. Melting temperature range 1360~1390ºC
2.1.2. Thermal conductivity
Table 2-1
θ/°C 20 100 200 300 400 500 600 700 800 900 1000
λ/(W/(m·C)) 11.47 12.77 14.44 15.99 17.54 18.97 20.64 22.32 23.99 25.83 27.88
2.1.3. Specific heat capacity
Table 2-2
θ/°C 20 100 200 300 400 500 600 700 800 900 1000
c/(J/(kg.C)) 446 467 494 520 547 572 600 626 652 679 706
2.1.4. Linear expansion coefficient
Table 2-3
θ/°C 16~100 16~200 16~300 16~400 16~500 16~600 16~700
α/10-6C-1 11.91 12.97 13.52 14.10 14.49 14.99 15.61
2.2. Density ρ=8.19g/cm3
2.3. Electrical properties
2.4. Magnetic properties
The alloy is non-magnetic.
2.5, chemical properties
2.5.1. Antioxidant performance Oxidation rate after 100h test in air medium
Table 2-4.
θ/°C 700 800 900
Oxidation rate/(g/(m3 h)) 0.0398 0.0236 0.1435
Note: The test method is according to YB48-1964.
2.5.2. Corrosion resistance The alloy has good resistance to heat corrosion.
metallographic structure
The alloy precipitates γ' phase on the austenite matrix, M23C6 carbides are distributed in the grain boundary in chains, MC carbides are mainly distributed in the grains, and M7C3 carbides are not found.
Process performance
1. The alloy has good hot working plasticity. In the temperature range of 1050~1150ºC, the allowable upsetting deformation is 80% without cracking. The forging temperature is 1130~1150ºC, and the final forging temperature is not lower than 950ºC.
2. The average grain size of the alloy is closely related to the deformation degree and final forging temperature of the forging.
3. The plates can be connected by argon arc welding. The weldability in the solid solution state is still good. After welding, the stress is eliminated and the aging treatment is carried out.
4. The cutting performance of the alloy in the solid solution state is better than that in the aging state.
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