Superalloy seamless tube and preparation method thereof

A method for preparing a superalloy seamless tube, the superalloy seamless tube consisting of the following components in percentages by weight:

• C:
• 0.01-0.06%, Si:
• 0.40-1.00%, Mn:
• 0.30-1.00%, P≤0.025%, S≤0.020%, Cr:
• 15.00-17.00%, Ni:
• 44.00-46.00%, Al:
• 2.90-3.90%, Ce:
• 0.01-0.03%, Ti:
• 0.10-0.30%, N:
• 0.03-0.08%, and the balance being Fe and inevitable impurities;
• the method comprising:
• (1) smelting and forging an alloy for achieving components of the superalloy seamless tube, to obtain a tube blank;
• (2) subjecting the tube blank to a hot piercing, to obtain a crude tube;
• (3) subjecting the crude tube to a first solution heat treatment and a cold rolling in sequence, to obtain an intermediate tube blank;
• (4) subjecting the intermediate tube blank to a second solution heat treatment and a cold rolling in sequence, to obtain a preliminary alloy tube;
• and
• (5) subjecting the preliminary alloy tube to a third solution heat treatment, to obtain a superalloy seamless tube.