	US 12,276,008 B2
	Tungsten-base alloy material and preparation method therefor
Shizhong Wei, Henan (CN); Liujie Xu, Henan (CN); Fangnao Xiao, Henan (CN); Kunming Pan, Henan (CN); Yucheng Zhou, Henan (CN); Xiuqing Li, Henan (CN); Jiwen Li, Henan (CN); Xiran Wang, Henan (CN); Xiaodong Wang, Henan (CN); Cheng Zhang, Henan (CN); Chong Chen, Henan (CN); Feng Mao, Henan (CN); Mei Xiong, Henan (CN); Guoshang Zhang, Henan (CN); and Dongliang Jin, Henan (CN)
Assigned to HENAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, Henan (CH)
Appl. No. 17/633,962
Filed by HENAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, Henan (CN)
PCT Filed Aug. 12, 2020, PCT No. PCT/CN2020/108558 § 371(c)(1), (2) Date Feb. 9, 2022, PCT Pub. No. WO2021/027824, PCT Pub. Date Feb. 18, 2021.
Claims priority of application No. 201910740731.2 (CN), filed on Aug. 12, 2019.
Prior Publication US 2022/0325380 A1, Oct. 13, 2022
Int. Cl. C22C 1/04 (2023.01); B21C 23/00 (2006.01); B22F 1/142 (2022.01); B22F 3/10 (2006.01); B22F 3/16 (2006.01); B22F 9/04 (2006.01); B22F 9/24 (2006.01); C22C 27/04 (2006.01); C22C 28/00 (2006.01); C22F 1/18 (2006.01)

CPC C22C 1/045 (2013.01) [B21C 23/002 (2013.01); B21C 23/007 (2013.01); B22F 1/142 (2022.01); B22F 3/1035 (2013.01); B22F 3/16 (2013.01); B22F 9/04 (2013.01); B22F 9/24 (2013.01); C22C 27/04 (2013.01); C22C 28/00 (2013.01); C22F 1/18 (2013.01); B22F 2009/043 (2013.01); B22F 2301/20 (2013.01); B22F 2302/25 (2013.01)]

17 Claims

1. A preparation method for a tungsten-base alloy material, comprising the following steps:

1) A composite powder is evenly ground then subjected to an annealing treatment at a temperature of 700 to 1000° C. to obtain a powder A; the composite powder is a powder I, a powder II or a powder III; the powder I contains tungsten, zirconium oxide, nickel and iron; the powder II contains tungsten, zirconium oxide, and a nickel-iron solid solution; the powder III contains tungsten, zirconium oxide, and a zirconium hydride-containing nickel-iron solid solution; a mass ratio of a nickel element and an iron element in the composite powder is 7:2 to 5;

2) The powder A is ground and compression-moulded into a shape, and then liquid-phase sintered to obtain a tungsten-base alloy blank,

wherein the powder I is obtained by mixing an iron powder, a nickel powder and a mixed powder as main raw materials; the powder II is obtained by mixing a nickel-iron solid solution powder and a mixed powder as main raw materials; and the powder III is obtained by mixing the zirconium hydride-containing nickel-iron solid solution and a mixed powder; the mixed powder used to prepare the powder I, the powder II, and the powder III is prepared by a method comprising the following steps:

i) a tungsten trioxide suspension and a hydrogen zirconium oxide suspension are prepared:

a) ammonium metatungstate is formulated into a precursor solution A with a pH≤1, and then the precursor solution A is subjected to a hydrothermal reaction to obtain the tungsten trioxide suspension;

b) zirconium nitrate is formulated into a precursor solution B with a pH of 11 to 13, and then the precursor solution B is subjected to a hydrothermal reaction to obtain the hydrogen zirconium oxide suspension;

ii) then the tungsten trioxide suspension and the hydrogen zirconium oxide suspension are mixed uniformly, a solvent is removed to make a powder, and then the powder is sequentially sintered and reduced to obtain the mixed powder.