A comprehensive introduction to GH93 special alloys
1.Alloy Overview:GH93 is a precipitation-hardened nickel-based alloy containing high levels of cobalt and chromium and is designed to operate in harsh environments such as high temperatures, heavy loads, and gas washout. Key properties include high-temperature strength, durability, creep, fatigue properties, and oxidation resistance. By controlling alloy composition, reducing impurity levels and improving purity, GH93 alloy is able to cope with extreme operating conditions.
2.Chemical Composition:
c(％)0.13
cr(％)18
ni( ) margin.
ti(％)3
fe(％)15
b(％)0.02
mn(％)1
al(％)1
si(％)0.015
p(％)0.015
s(％)0.0025
co(％)21
cu(％)0.2
pb(％)0.0025
3.Physical Properties:
Melting temperature: 1360 1390
Density: 819g/cm3
4.Mechanical Properties:
Tensile strength (b): 1080 MPa
Yield strength (p0.)2): 685 mpa
Elongation (5): 20%.
Brinell hardness (HBS): 290
5.Processing technology:
Smelting process:The vacuum double-triple process is used to melt to remove low-melting point colored impurities and gases, improve the purity of the alloy and improve the crystalline structure.
Forging process:Forging is carried out in the temperature range of 10501150, the allowable upsetting deformation is 80% without cracking, the heating temperature of forging billet is 11301150, and the final forging temperature is not less than 950.
Heat Treatment Process:The turbine disc blank can be solution treated first, then aged under argon protection, or machined after complete heat treatment. The blank is slowly heated in the uniform temperature zone in the heat treatment heating furnace and dispersed during cooling.
Summary:GH93 special alloy ensures the excellent performance of the alloy in harsh environments such as high temperature and heavy load through precise control of chemical composition and efficient melting process, as well as sophisticated forging and heat treatment processes. It is widely used in key components of aero engines, providing reliable alloy material support for improving the performance and life of parts in high-temperature working environments.