What material is inconel625?

Trade name: Inconel625? Nickel-based superalloy

American brand: UNS? N06625

China brand: GH3625/GH625

French brand: NC22DNb

German brand: Nr.2.4856

I. Overview of Inconel625(NO6625) superalloy:

Inconel625 is a solid solution strengthened nickel-based deformed superalloy with molybdenum and niobium as main strengthening elements, which has excellent corrosion resistance and oxidation resistance, good tensile properties and fatigue properties at low temperature to 980℃, and stress corrosion resistance in salt spray environment. Therefore, it can be widely used to manufacture aero-engine parts, aero-structural parts and chemical equipment. The alloy has good machinability and weldability, and can supply various plates, bars, pipes, wires, belts and forgings.

1, material grade:? Inconel 625.

2.Inconel625 similar brand:? GH3625(GH625) (China), UNS NO6625 (USA), NC22DNb (France), 2.4856 (Germany).

3. Chemical composition: See table 1- 1.

4. heat treatment system: bar: 950 ~ 1030℃, air cooling or water cooling; Or 1090 ~ 1200℃, air cooling or water cooling for solid solution treatment. Plate: 950 ~ 1030℃, air cooled; Or 1090 ~ 1200℃, air cooling. Pipe: Recommended annealing temperature: 960 ~ 1030℃, air cooling or water cooling.

5. Variety specification and supply situation: d25~80mm bar and δ 0.8 ~ 10.5mm plate can be supplied, and D6 ~ 40mm seamless (welded) pipes can also be supplied. The bar is delivered in the state of turning or polishing without heat treatment; Providing a plate after solid solution and finishing; Pipes shall be supplied after solution, pickling (or bright annealing).

6. Melting and casting process: the alloy is produced by vacuum induction furnace melting and electroslag remelting or vacuum induction furnace and vacuum arc remelting.

7. Application overview and special requirements: The alloy is used to manufacture engine casing, guide vanes, mounting edges, cylinders, fuel manifolds and other parts, and has passed the practical application assessment, with the highest service temperature of 950℃; After long-term use at 550 ~ 700℃, the alloy has certain age hardening phenomenon, which leads to the decline of alloy plasticity.

2. Physical and chemical properties of Inconel 625 (NO 6625) superalloy:?

1, thermal performance:

The melting temperature range of (1) and Inconel625:1290 ~1350℃.

Verb (abbreviation of verb) Inconel625(NO6625) Technological properties and requirements of superalloy;

The formability of 1 and Inconel625;

The alloy has good cold and hot formability. The ingot forging heating temperature is 1 120℃, the start forging temperature is not lower than 1030℃, and the stop forging temperature is not lower than 930℃; During die forging, the final deformation should not be less than 15% ~ 20%. The heating temperature for rolling is1120 ~160℃, the starting rolling temperature is not lower than 1050℃, the stopping rolling temperature is not lower than 930℃, the deformation of the semi-finished cold-rolled sheet is 25% ~ 30%, and the deformation of the finished product is not lower than 30%. The quenching temperature of intermediate products and finished products is 1 100℃ 10℃.

2, Inconel625 welding performance:

The alloy has good weldability and can be used for argon arc welding, brazing and resistance seam welding with tungsten electrode or the alloy as filler in protective atmosphere.

3, Inconel625 parts heat treatment process:

Stress relief: 900℃; Annealing: 930 ~ 1040℃,1h; ; Solution treatment: 1090 ~ 1200℃, air cooling or water cooling. When the working temperature of the alloy is not higher than 650℃, hot rolled, cold rolled or annealed materials can be used as required. When the working temperature is above 650℃, the parts with better requirements for fatigue performance and tensile strength can be annealed, and the parts with better requirements for creep and durability can be treated by solid solution.

4.Inconel625 surface treatment process: when removing the oxide scale on the alloy surface, wash it with alkali first, and then wash it with acid in nitric acid-hydrofluoric acid-water solution.

5. Cutting and grinding performance of Inconel625:

Carbide or high speed steel tools should be used. The tool used should have a positive rake angle. Water-based coolant is recommended for high-speed cutting and viscous coolant is recommended for low-speed cutting.