The implementation standards of GH2132 alloy usually include the following international standards:
1.ASTM Standards: Typically meets the standards of the American Society for Materials and Testing (ASTM), which include ASTM B443 (plates, sheets, and strips), ASTM B446 (rods, wires, and forgings), ASTM B444 (seamless and welded nickel-chromium-molybdenum tubing), ASTM B366 (welded pipe fittings), and more.
2.AMS Standards: Also commonly compliant with the Aerospace Materials Specification (AMS) standards, such as AMS 5599 (welded leads for nickel, carbon and boron), AMS 5666 (nickel alloy rods, wires, rings and rings, etc.), AMS 5837 (hardened, annealed or solution tempered nickel alloy forgings), etc.
3.ISO standards: May comply with relevant International Organization for Standardization (ISO) standards, such as ISO 15156 (material property requirements in the oil and gas industry), ISO 6207 (superalloy seamless pipe), etc.
4.DIN standard: In some European countries it may be in accordance with the German Industrial Standard (DIN), such as DIN 24856 (nickel alloy plates, strips, bars, wires), DIN 17742 (seamless pipes), DIN 17750 (forgings), etc.
The chemical composition of it is as follows:
Nickel (Ni): Minimum 50% of rated composition, providing the high-temperature strength and corrosion resistance of the alloy.
Chromium (CR): accounts for 20-23%, which enhances the corrosion resistance of the alloy and improves the strength and hardness of the alloy at high temperatures.
Molybdenum (Mo): accounts for 8-10%, forming a strong hardened phase in the alloy, improving the strength and wear resistance of the alloy, and improving the stability of the alloy in a high-temperature environment.
Iron (Fe): Up to 5%, assists in strengthening and stabilizing the microstructure of the alloy and increasing strength and hardness.
Silicon (Si): up to 05%, which improves the thermal creep resistance of the alloy.
Titanium (Ti): up to 04%, which can form a strong hard phase and a stable metal oxide layer, which improves the corrosion resistance and heat resistance of the alloy.
Manganese (MN): up to 05% to help improve the oxidation resistance and thermal creep of the alloy.
Carbon (c): up to 01%, which can improve the hardness and strength of the alloy.
Boron (b): up to 0006%, which contributes to the solution strengthening and processing properties of the alloy.
Key anti-corrosion properties include:
1.Corrosion resistance: Excellent performance in a wide range of corrosive media, including acidic, alkaline, and saline environments. It can resist the corrosion of strong acids such as sulfuric acid, hydrochloric acid, hydrofluoric acid, etc., and can also resist the erosion of alkaline solutions.
2.Oxidation resistance: It has good oxidation resistance, can maintain stability under high temperature oxidation conditions, and is not easy to produce oxide layer peeling or surface failure.
3.High temperature resistance: It can maintain stable performance in high temperature environments, so it still has good corrosion resistance in high temperature atmospheres or high temperature liquids.
4.Creep resistance: It has good thermal creep resistance, can maintain shape stability for a long time under high temperature and high stress conditions, and is not easy to deform or creep.
The heat treatment method is solution and aging treatment, the main purpose is to improve the strength and hardness of the alloy while maintaining its good corrosion resistance and thermal creep resistance.
1.Solution treatment.
Solution treatment refers to heating an alloy to a high temperature, holding it for a period of time and then cooling it quickly to eliminate residual stresses in the alloy and strengthen the alloy grains. GH2132 alloy solution treatment is generally carried out in the temperature range of 980-1180, and the solution time must be determined according to the alloy specifications, size and application requirements. Normally, the solution time is not less than 30 minutes.
2.Timeliness.
Aging treatment refers to the long-term aging of the alloy at a lower temperature after solution treatment. Aging helps to form a stable hardened phase in the alloy, increasing its strength and hardness. The aging temperature of GH2132 alloy is generally between 550-870, and the aging time and temperature are determined according to the alloy specifications, product shape and use conditions. Usually, the processing time is not less than 16 hours.