GH4169 nickel-based superalloy GH169

GH4169 nickel-based superalloy GH169

GH4169 (GH169) nickel-based superalloy overview
GH4169 alloy is a nickel-based alloy that can be hardened by precipitation. It still exhibits high yield strength, tensile strength and creep cracking strength in high temperature environments up to 704 ° C. The age hardening reaction of GH4169 alloy is slow, so it will not harden with heating and cooling during annealing and welding. Compared with other nickel-based super alloys added with aluminum and titanium, GH4169 alloy has good fatigue resistance, radiation resistance, oxidation resistance, corrosion resistance, and good processing performance, welding performance and long-term organizational stability.

GH4169 (GH169) nickel-based superalloy similar grades
UNS N07718 inconel718 (United States), GH4169 GH169 (China)

GH4169 (GH169) nickel-based superalloy heat treatment
Method 1: Obtain the best tensile strength and stress cracking strength
954-982 ° C, 1 hour, air cooling + 718 ° C, 8 hours, cooling to 621 ° C at 56 ° C / hour, holding for 8 hours, then air cooling.
Method 2: Obtain the best tensile strength at room temperature and low temperature
Heat treatment at 1066 ° C for 1-2 hours, air cooling + 718 ° C for 8 hours, cooling to 621 ° C at 56 ° C / hour, holding for 8 hours, then air cooling.

GH4169 (GH169) nickel-based superalloy processing performance
 Thermal processing
The temperature of the hot processing furnace does not exceed 1121 ° C. If the working temperature is below 593 ° C, the temperature range of cold working is controlled at 927-1010 ° C, which can provide forging strength. Avoid heating in the furnace for a long time during forging.
Machine Plus
Both annealed and age hardened states can be machined. Age hardened state is more convenient to break, and the surface finish is better. For annealed materials, the machine tool life is slightly longer.

GH4169 (GH169) nickel-based superalloy welding
GH4169 can be welded in both annealed and aged states. When welding aged materials, the areas softened by the welding heat will deform.

GH4169 (GH169) nickel-based superalloy applications
Used in the manufacture of various stationary parts and rotating parts in aerospace engines, such as disks, rings, casings, shafts, blades, fasteners, elastic elements, gas pipes, sealing elements, etc., and welded structural parts; manufacturing nuclear energy Various elastic elements and grids for industrial applications; manufacturing parts and other parts for petroleum and chemical applications.