Patent ID: 11913105
Assignee: ZHEJIANG UNIVERSITY
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 2:
3. The method for preparing a copper alloy according to claim 1, wherein the process conditions of continuous extrusion in step (b) are as follows:
(1.1) adopting forged Ni-base superalloy for an extrusion die, the superalloy containing 0.05 wt. % C, 15 wt. % Cr, 6 wt. % Mo, 5 wt. % W, 2 wt. % Ti, 5.5 wt. % Al, and Ni; performing process smelting of the superalloy through vacuum melting+electroslag remelting, and forming by hot forging and heat treatment after homogenization;
(1.2) preheating the extrusion die to 500 to 600° C. before extrusion, preheating the copper alloy as-cast primary billet to 700 to 750° C., and then entering the cavity of the extrusion die for continuous extrusion to obtain the billet, controlling the rotation speed of the extrusion wheel at 3 to 8 rpm, the extrusion ratio at 3 to 8, and the extrusion gap at 0.6 to 2 mm;
(1.3) performing a high-intensity cooling water spray of the billet obtained in step (1.2) at the outlet of the extrusion die, the spray device adopting an atomizing nozzle, and the nozzle interval being 10 to 20 mm, setting the number according to the size of the billet, and the distance between the nozzle and the surface of the billet being 10 to 50 mm, the water pressure being 0.5 to 0.8 MPa, cooling the billet quickly from high temperature to room temperature to avoid the precipitation decomposition of the supersaturated solid solution.