Inconel 718 alloy
Forging and rolling processes of Inconel 718 alloy
Inconel 718 is a nickel-based high-temperature alloy typically forged and rolled to achieve the desired mechanical properties and shape. Forging refines the grain structure and increases strength, while rolling is used to produce various shapes such as plate, strip, or tube. Both processes require precise control of temperature and deformation to prevent defects and ensure material integrity.
What temperatures are required for forging Inconel 718?
For hot working, furnace temperatures up to 2050°F (1121°C) are acceptable. For service temperatures below 1100°F (593°C), hot and cold working within the 1700/1850°F (927/1010°C) range can improve forging strength. Extended holding times at forging temperatures are not ideal.
Inconel 718 Forging:
Hot forging: This is the primary forging method for Inconel 718, requiring the alloy to be heated to 950-1200°C (avoiding the brittle temperature range) and then formed using a press or hammer.
Open die forging: In this process, the heated alloy is formed between flat or simple dies, imparting some flexibility to the final shape.
Closed die forging (press die): This method uses specially shaped dies to create more complex geometries and typically involves multiple heating and deformation steps.
Upset forging: This process involves compressing the material axially to increase its diameter and is commonly used to create heads or flanges on parts.
Rotary forging: This process uses a rotating die to reduce the diameter of the workpiece and is commonly used to create stepped shafts or other shapes with varying diameters.
Rotary forging: A specialized form of forging in which the material is rotated and deformed by rollers or dies, typically used to create rings or other axisymmetric shapes.
Inconel 718 Rolling:
Hot Rolling: After heating, the ingot is passed through a rolling mill, where it is reduced in thickness under pressure from rollers to produce plate, sheet, and strip.
Cold Rolling: This process is used to further improve material properties and achieve tighter dimensional tolerances, and is typically performed after hot rolling.
Ring Rolling: A specialized rolling process used to produce rings, commonly used in aerospace and gas turbine applications.
Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications, and we can provide customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneemetal.com.
