	US 11,685,968 B2
	Nano dispersion copper alloy with high air-tightness and low free oxygen content and brief manufacturing process thereof
Zhou Li, Hunan (CN); Wenting Qiu, Hunan (CN); Zhu Xiao, Hunan (CN); and Shen Gong, Hunan (CN)
Assigned to CENTRAL SOUTH UNIVERSITY, Changsha (CN)
Appl. No. 16/627,979
Filed by CENTRAL SOUTH UNIVERSITY, Hunan (CN)
PCT Filed Mar. 15, 2019, PCT No. PCT/CN2019/078199 § 371(c)(1), (2) Date Dec. 31, 2019, PCT Pub. No. WO2020/155322, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 201910088573.7 (CN), filed on Jan. 29, 2019.
Prior Publication US 2021/0363610 A1, Nov. 25, 2021
Int. Cl. C22C 1/04 (2023.01); B22F 9/04 (2006.01); B22F 9/22 (2006.01); C22C 1/05 (2023.01); C22C 9/00 (2006.01); C22C 32/00 (2006.01); B22F 3/17 (2006.01); B22F 3/20 (2006.01); B22F 9/08 (2006.01)

CPC C22C 1/0425 (2013.01) [B22F 3/172 (2013.01); B22F 3/20 (2013.01); B22F 9/04 (2013.01); B22F 9/082 (2013.01); B22F 9/22 (2013.01); C22C 1/05 (2013.01); C22C 9/00 (2013.01); C22C 32/0021 (2013.01); B22F 2009/043 (2013.01); B22F 2301/10 (2013.01); B22F 2302/253 (2013.01)]

10 Claims

1. A brief manufacturing process of a nano dispersion copper alloy, comprising the steps of:

preparing Cu—Al₂O₃alloy powder by an internal oxidation method;

mixing the Cu—Al₂O₃alloy powder with Cu—Ca—La alloy powder;

sheathing the mixed powder under protection of argon to obtain a sheath;

performing hot extrusion on the sheath at 900° C. to 920° C. to obtain an extruded sheath;

performing rotary forging on the extruded sheath to obtain a rotationally forged bar;

placing the rotationally forged bar in a new sheath;

vacuumizing the new sheath to be less than or equal to 10⁻³Pa;

sealing the new sheath to obtain a new sealed sheath; and

placing the new sealed sheath in a nitrogen atmosphere with a temperature ranging from 450° C. to 550° C. and a pressure intensity ranging from 40 Mpa to 60 Mpa for 3 hours to 5 hours,

wherein the nano dispersion copper alloy comprises the following components in percentage by mass:

0.05 wt. % to 1.61 wt. % of Al₂O₃,

0.008 wt. % to 0.012 wt. % of Ca,

0.008 wt. % to 0.012 wt. % of La, and the balance of Cu.