3. Powder metallurgy process
Powder metallurgy technology is mainly used to produce precipitation strengthened and oxide dispersion strengthened high-temperature alloys. This process can achieve plasticity or even superplasticity in cast high-temperature alloys that generally cannot deform.
4. Strength improvement process
(1) Solid solution strengthening


The second phase is precipitated from supersaturated solid solution through aging treatment（ ', Carbides, etc.) to strengthen the alloy. ' The phase is the same as the matrix and has a face centered cubic structure. The lattice constant is similar to the matrix and is coherent with the crystal. Therefore The phase can precipitate uniformly in the matrix as small particles, hindering the movement of dislocations and producing significant strengthening effects. ' The phase is an A3B type intermetallic compound, where A represents nickel and cobalt, B represents aluminum, titanium, niobium, tantalum, vanadium, and tungsten, while chromium, molybdenum, and iron can be both A and B. Typical in nickel based alloys ' The phase is Ni3 (Al, Ti).




④ Adding elements such as cobalt, tungsten, and molybdenum to improve ' The strength of the phase. The phase is a body centered tetragonal structure, composed of Ni3Nb The mismatch between the phase and the matrix is relatively large, which can cause a significant degree of coherent distortion, enabling the alloy to achieve high yield strength. However, above 700 degree , the strengthening effect is significantly reduced. Cobalt based high-temperature alloys generally do not contain Phase, but strengthened with carbides.