Inconel783 Material introduction
Inconel783（UNS R30783/GH783） is Co-Ni-Fe Base precipitation hardening ferromagnetic oxidation resistant low expansion deformation superalloy, the service temperature is less than 750 ℃. The alloy precipitates during aging by adding a large amount of aluminum and niobium γ＇- Ni3 (Al, Nb) dispersion strengthening phase and block, β- Ni Al phase. The alloy can reach the level of complete oxidation resistance at 750 ℃, and has excellent mechanical properties at room temperature and high temperature, low coefficient of thermal expansion and low density. Fine grain size can be controlled by precipitation of NiAl phase during thermal denaturation. The microalloyed alloy has excellent hot workability and cold forming processability. The main products are bar, cake blank, ring, cold rolled sheet and strip, etc.
Inconel783 chemical composition
element | C | Cr | Ni | Co | Al | Ti | Fe | Nb |
mass fraction／% | ≤0.03 | 2.5-3.5 | 26.0-30.0 | more than | 5.0-6.0 | ≤0.4 | 24.0-27.0 | 2.5-3.5 |
element | Mn | Si | S | P | Cu | Ta | B |
|
mass fraction／% | ≤0.50 | ≤0.5 | ≤0.005 | ≤0.015 | ≤0.5 | ≤0.05 | 0.003-0.012 |
|
Inconel783 Physical and mechanical properties
density | melting point |
7.81g/cm³ | - |
varieties | heat treatment | θ/℃ | tensile strength
σb/MPa | yield strength
σp0.2/MPa | Elongation
δ5/% | Shrinkage Ψ/% |
Bars, forgings, rings | Standard heat treatment | 20 | ≥1105 | ≥725 | ≥12 | ≥20 |
650 | ≥895 | ≥620 | ≥15 | ≥25 |
750 | ≥540 | ≥450 | ≥20 | ≥35 |
Cold rolled sheet and strip | Standard heat treatment | 20 | ≥1100 | ≥725 | ≥12 | - |
650 | ≥850 | ≥570 | ≥15 | - |
Inconel783 Heat treatment system
Bars, forgings and rings，1115℃±5℃/AC(Or faster cooling)+845℃±10℃×(2~4)h/AC+720℃±10℃×(8±0.5)h/FC(56℃/h)→620℃±10℃×(8±0.5)h/AC，The solution insulation time is determined by the section size of the component；
B)Cold rolled sheet and strip，1115℃±5℃×(10-30）min/AC（Or air-cooled）+845℃±10℃×3h/AC+ 720℃±10℃×8h/FC(560C/h)→620℃±10℃×8h/AC(Or air-cooled)。
