Inconel713C casting superalloy
Inconel713C is a γ'phase precipitation strengthened nickel-based casting superalloy. It has good creep strength, thermal fatigue performance and oxidation resistance below 900°C. The alloy composition is relatively simple, does not contain cobalt, and has a low density. It is usually used in the as-cast state. The use of hot isostatic pressing (HIP) treatment and subsequent heat treatment can improve the plasticity and fatigue properties, and can also restore the structure and performance of parts that have degraded and reduced performance after long-term use. Long-term aging at 800°C will precipitate a small amount of σ phase, but it has no significant effect on performance. The alloy is suitable for making turbine rotor blades, guide blades, integral cast turbines and other high temperature parts of gas turbines operating below 900°C.
1.1 Material grade: K418(K18,518).
1.2 Similar grades: INCO713C(USA).
1.3 Material technical standards: HB5162-1988[K418Alloy ingot].
1.4 Chemical composition:
| C |
Cr |
Ni |
Mo |
Al |
Ti |
Nb |
Fe |
| 0.08~0.16 |
11.5~13.5 |
Bal. |
3.8~4.8 |
5.5~6.4 |
0.5~1.0 |
1.8~2.5 |
≤1.0 |
| B |
Zr |
Mn |
Si |
P |
S |
Bi |
Pb |
| 0.008~0.020 |
0.06~0.15 |
≤0.5 |
≤0.5 |
≤0.015 |
≤0.01 |
≤0.0001 |
≤0.001 |
1.5Heat treatment system for as-cast use, or 1180ºC, 2h, air cooling +930ºC, 16h, air cooling
1.6Varieties, specifications and supply status Round bar-shaped master alloy ingots or various castings. As cast supply.
1.7Melting and casting process The master alloy is smelted in a vacuum induction furnace, and investment casting parts and patterns are remelted and poured in the vacuum induction furnace.
1.8Application overview and special requirements The alloy has been widely used in aviation, ground and offshore gas turbine turbine working blades, guide blades and cast turbines that work below 900 ºC, and it is also widely used in diesel and gasoline engine turbochargers and hot extrusion dies. The long-term production and use practice of more than 1,000 tons of more than a dozen manufacturers has proved that the alloy has stable metallurgical quality and reliable performance. The INC0713C alloy, which is equivalent to this alloy, is widely used in various aero-engine turbine working blades and guide blades abroad. When the alloy is used for a long time under hot corrosion conditions, it must have a protective coating.
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