Main grades of high-temperature alloys:

Solid solution strengthened iron-based alloys:

GH1015, GH1035, GH1040, GH1131, GH1140

Age-hardenable iron-based alloys:

GH2018, GH2036, GH2038, GH2130, GH2132, GH2135, GH2136, GH2302, GH2696

Solid solution-strengthened nickel-based alloys:

GH3030, GH3039, GH3044, GH3028, GH3128, GH3536, GH605, GH600

Age-hardenable nickel-based alloys:

GH4033, GH4037, GH4043, GH4049, GH4133, GH4133B , GH4169, GH4145, GH4090

Overseas high-temperature alloys are called inconel series, incoloy series, Hastelloy series

Composition and properties

Nickel-based alloys are used in high-temperature alloys The widest class of alloys with the highest high-temperature strength. The main reasons are: first, nickel-based alloys can dissolve more alloy elements and maintain better structural stability; second, they can form well-ordered A3B-type intermetallic compounds γ'[Ni3(Al, Ti)] phase serves as the strengthening phase, which effectively strengthens the alloy and obtains higher high-temperature strength than iron-based superalloys and cobalt-based superalloys; thirdly, nickel-based alloys containing chromium have better resistance than iron-based superalloys. yangization and resistance to gas corrosion. Nickel-based alloys contain more than ten elements, among which Cr mainly plays an anti-oxidation and anti-corrosion role, and other elements mainly play a strengthening role. According to their strengthening mode, they can be divided into: solid solution strengthening elements, such as tungsten, molybdenum, cobalt, chromium and vanadium; precipitation strengthening elements, such as aluminum, titanium, niobium and tantalum; grain boundary strengthening elements, such as boron, zirconium, Magnesium and rare earth elements, etc.