Nimonic90 High Temperature Alloy

1. Introduction to Nimonic90 materials

Nimonic90 is an aging-reinforced nickel-based deformation high-temperature alloy, which contains a higher amount of cobalt and a variety of reinforcement elements. Corresponding to the grade of China GH90. The alloy has high tensile strength and creep resistance at 815 to 870°C, good oxidation resistance and corrosion resistance, high fatigue strength and good formability and welding properties under repeated alternation of hot and cold. Mainly supply hot rolled and cold-drawn bars, cold-rolled sheets, strips and cold-drawn wire materials.

2. Chemical composition of Nimonic90

C ≤0.13
Cr 18.0-21.0
Nation 余
Co 15.0-21.0
Al 1.0-2.0
Ti 2.0-3.0
Mn ≤0.0.4
If ≤0.8
P ≤0.020
S ≤0.015
Ag ≤0.0005
Pb ≤0.0020
Bi ≤0.0001
B ≤0.020
C ≤0.20
Fe ≤1.50
Zr ≤15

3. Nimonic90 physical properties

Nimonic90 melting temperature range melting point 1400℃
Nimonic90 density: ρ=8.20g/cm3.
Nimonic90 Electrical Performance
Nimonic90 Magnetic Performance: Alloy is non-magnetic.
Nimonic90 Chemical Properties: Alloys have good oxidation resistance and corrosion resistance below 1040℃; intergranular oxidation is prone to occur at above 1040℃.

4. Nimonic90 variety specifications and supply status

Supply cold-drawn rods or cold-drawn hexagonal rods with a diameter or diameter of not more than 25mm; cold-rolled thin plates with a thickness of not more than 4mm and cold-rolled strips with a thickness of not more than 0.8mm; cold-drawn wire materials for springs with a diameter of not more than 8mm. The supply status of cold-pull rods is divided into: upsetting rods are delivered in cold-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull-pull- The cold-rolled thin plates and strips (soft state) are delivered after softening treatment, alkali pickling, and edge cutting; the cold-rolled thin plates and strips (hard state) are delivered after cold rolling and edge cutting. The spring wire material is delivered in a cold-pull state or a solid solution treatment state.

The Nimonic90 smelting and casting process alloy is melted using one of the following four processes: (1) induction smelting plus electroslag remelting; (2) vacuum induction smelting plus electroslag remelting; (3) vacuum induction smelting plus vacuum arc remelting; (4) vacuum induction smelting.

Nimonic90 Application Overview and Special Requirements This alloy is used as a high-temperature spring element, a high-temperature fastener, a combustion chamber on the engine.

Parts such as clamping rings, stop pins, etc. It is also used as a component such as turbine working blades, turbine discs, etc. abroad.

V. Nimonic90 process performance and requirements

5.1 Nimonic90 forming performance alloy is prone to internal cracking during forging, and does not allow heavy hammer strikes, and does not allow low-temperature chamfering. The temperature of the steel ingot furnace shall not be higher than 700℃, the final heating temperature shall be 1150℃±10℃, the opening forging temperature shall not be lower than 1060℃, and the final forging temperature shall not be lower than 950℃. The rolling heating temperature is 1160℃, and the final rolling temperature is not lower than 950℃. The cold-drawn material should undergo 8% to 12% cold deformation after the final intermediate annealing.

5.2 Nimonic90 welding performance The alloy can be subjected to inert gas-protected tungsten arc welding and flash butt welding in solid solution state.

5.3 The heat treatment process of Nimonic90 parts heat treatment process The heat treatment process of parts is carried out according to the corresponding material technical standards heat treatment system.

5.4 Nimonic90 surface treatment process

6. Nimonic90 application field

Used for turbine engine turbine discs, blades, high-temperature fasteners, clamps, sealing rings and elastic components, etc.
This alloy is used as a high-temperature spring element, a high-temperature fastener, a combustion chamber, a clamp, a stop pin and other components on the engine. It is also used as a component such as turbine working blades, turbine discs, etc. abroad.