A comprehensive introduction to GH98 (GH98) precipitation-hardening deformed superalloy
1.Alloy Overview:GH98 is a Ni-Cr-based precipitation-hardening deformed superalloy, which is suitable for high-temperature environments with long-term operating temperatures up to 1000°C. The alloy adopts multiple strengthening mechanisms such as solution strengthening, precipitation strengthening and grain boundary strengthening, and has high room temperature and high temperature strength, excellent oxidation resistance, and good hot working and welding properties.
2.Chemical Composition:
c(％)0.10
cr(％)17.5-19.5
ni( ) margin.
mo(％)3.5-5.0
w(％)5.5-7.0
al(％)2.5-3.0
nb(％)1.5
ti(％)1.0-1.5
fe(％)3.0
si(％)0.3
mn(％)0.3
p(％)0.015
s(％)0.015
b(％)0.005
cu(％)0.070
co(％)5.0-8.0
ce(％)0.020
3.Main products:Hot-rolled rods, hot-rolled sheets, cold-rolled sheets and strips, etc.
4.Applications:GH98 alloy is used to make high-temperature parts such as turbine blades, heat shields, tail nozzles and afterburners for aviation and aerospace engines. In foreign countries, similar grades have been widely used in engine baffles, stiffeners, aircraft fixings, guide vanes and other cold stamping and welded parts with a working temperature of up to 1000.
5.Heat treatment regime:a.Forged & Rolled Bars: (10801100) Thermal Insulation (24) Hour Air Cooling + 760 20 Thermal Insulation (1216) Hour Air Cooling BCold-rolled plate: 1090 10 heat preservation 20 minutes furnace cooling + 760 10 heat preservation (812) hours air cooling cCold rolled strip: (1080 1120) furnace cooled or air cooled.
Summary:GH98 alloy has demonstrated excellent performance in high-temperature environments through the application of various strengthening mechanisms. Its wide range of applications includes key components for aerospace engines, providing reliable alloy material support for improving the performance and life of components in high-temperature operating environments.