K417specifications
K417is a high strength nickel base cast superalloy
The content of aluminum and titanium in its composition is relatively high, forming a γ’ strengthening phase that accounts for about 67% of the weight of the alloy, so the high temperature strength is high, the plasticity is good, and its density is low (7.8g/cm3), so it is particularly suitable for production. High temperature rotating parts. However, its structural stability is poor, especially when the composition is on the upper limit or the casting process parameters are not controlled properly, the parts tend to precipitate flaky σ phase during long-term work at 850-950 °C. Its heat-resistant corrosion performance is also poor, if it is used for a long time at high temperature, a protective coating is required.
chemical composition
Typical values(Weight %)
Mechanical properties
physical properties
Density: 7.8 g/m3
Melting point: 1260℃-1340℃
Magnetic properties: none
Similar grades
USA: IN100
technical standard
HB 5161—1988
physical data
Formability
Investment casting method can be used to cast thin-walled parts with a wall thickness as small as 1mm, and can also cast integral turbines
Welding performance
Argon arc welding is possible
Heat treatment process of parts
1. The parts are used in the as-cast state;
2. Aluminizing and stress relief annealing treatment can also be carried out, and the treatment temperature is lower than 1120℃.
Surface treatment process
1. Using the solid aluminizing method, the alloy can be aluminized, aluminized chromium and aluminized silicon;
2. In terms of technology, powder packaging, low pressure air infiltration and slurry methods can be used.
Machining and Grinding Performance
Turning, drilling, milling, planing and grinding are required at lower rotational speeds
