US 11,891,679 B2
High-strength and low-modulus β-type Si-containing titanium alloy, preparation method therefor and use thereof
Yuanyuan Li, Guangzhou (CN); Weiwen Ye, Guangzhou (CN); Chao Yang, Guangzhou (CN); Fen Wang, Guangzhou (CN); Weiwen Zhang, Guangzhou (CN); and Zhiyu Xiao, Guangzhou (CN)
Assigned to SOUTH CHINA UNIVERSITY OF TECHNOLOGY, Guangzhou (CN)
Appl. No. 16/497,810
Filed by SOUTH CHINA UNIVERSITY OF TECHNOLOGY, Guangzhou (CN)
PCT Filed Nov. 15, 2017, PCT No. PCT/CN2017/111106
§ 371(c)(1), (2) Date Sep. 26, 2019,
PCT Pub. No. WO2018/176853, PCT Pub. Date Oct. 4, 2018.
Claims priority of application No. 201710186636.3 (CN), filed on Mar. 27, 2017.
Prior Publication US 2020/0056267 A1, Feb. 20, 2020
Int. Cl. C22C 14/00 (2006.01); A61L 27/06 (2006.01); C22C 1/02 (2006.01); C22C 1/04 (2023.01); C22F 1/00 (2006.01); C22F 1/18 (2006.01)
CPC C22C 14/00 (2013.01) [A61L 27/06 (2013.01); C22C 1/02 (2013.01); C22C 1/0458 (2013.01); C22F 1/002 (2013.01); C22F 1/183 (2013.01); A61L 2430/02 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A preparation method for a P Si-containing titanium alloy, comprising the steps of:
(1) preparing alloy components with, in atomic percentage, 60-70% of Ti, 10-20% of Nb, 5-15% of Zr, 1-10% of Ta and 1-5% of Si and using sponge titanium, sponge zirconium, a tantalum-niobium alloy and silicon as raw materials;
(2) smelting the alloy components prepared in step (1) to obtain a solidified ingot;
(3) subjecting the solidified ingot obtained in step (2) to plastic deformation with a deformation temperature of 800-900° C. and a deformation rate of 60-80%, and water-quenched to room temperature to obtain a plasticly deformed ingot, wherein the plastic deformation in the step (3) adopts any one of hot rolling, hot forging, and hot extrusion;
(4) heating the plasticly deformed ingot in step (3) to a recrystallization temperature of 900° C., maintaining the recrystallization temperature for 1-4 hr to obtain a recrystallized ingot, and carrying out an annealing treatment and air-cooling on the recrystallized ingot to room temperature to obtain the β Si-containing titanium alloy.