Nickel-based superalloy and manufacturing method therefor, and component and application

A nickel-based superalloy, wherein the nickel-based superalloy is prepared by 3D printing using the following raw materials:

• the raw materials consists of following composition by mass percentage:
• 0.2-0.28% of C, less than 5% of Co, 13-15% of W, 20-24% of Cr, 1-3% of Mo, 0.2-0.5% of Al, less than 0.1% of Ti, less than 3% of Fe, 0.01-0.014% of B, 0.001-0.004% of La, 0.01-0.2% of Mn, and 0.02-0.2% of Si, with a balance being Ni;
• the nickel-based superalloy has no cracks;
• in the microstructure of the nickel-based superalloy, an average size of carbide is 150-200 nm, and a size distribution of the carbide is 50 nm-4 μm;
• the carbide in the nickel-based superalloy comprises primary carbides and secondary carbides;
• the primary carbide has a size of 200 nm-4 μm and is located in a W and Mo elements enriched region between dendrites and cellular crystals;
• the secondary carbide has a size of 50-150 nm and is located partially at an interface and partially inside a grain,
• wherein the 3D printing is the selective laser melting, and process parameters during the selective laser melting comprise:
• (a) laser power:
• 100-700 W;
• (b) laser scanning speed:
• 600-2000 mm/s;
• (c) spot diameter:
• 40-110 μm;
• (d) laser spacing:
• 80-120 μm;
• and
• (e) powder thickness:
• 20-80 μm.