US 12,465,977 B2
Preparation method for additive manufacturing titanium alloys
Zhefeng Zhang, Liaoning (CN); Zhan Qu, Liaoning (CN); Zhenjun Zhang, Liaoning (CN); and Rui Liu, Liaoning (CN)
Assigned to INSTITUTE OF METAL RESEARCH, CHINESE ACADEMY OF SCIENCES, Liaoning (CN)
Appl. No. 18/875,719
Filed by INSTITUTE OF METAL RESEARCH, CHINESE ACADEMY OF SCIENCES, Liaoning (CN)
PCT Filed Jul. 26, 2024, PCT No. PCT/CN2024/107679
§ 371(c)(1), (2) Date Dec. 16, 2024,
PCT Pub. No. WO2025/107698, PCT Pub. Date May 30, 2025.
Claims priority of application No. 202311563369.9 (CN), filed on Nov. 22, 2023.
Prior Publication US 2025/0170651 A1, May 29, 2025
Int. Cl. B22F 10/64 (2021.01); B22F 10/28 (2021.01); B23K 26/342 (2014.01); B23K 103/14 (2006.01); B33Y 10/00 (2015.01); B33Y 40/20 (2020.01); B33Y 70/00 (2020.01)
CPC B22F 10/64 (2021.01) [B22F 10/28 (2021.01); B23K 26/342 (2015.10); B33Y 10/00 (2014.12); B33Y 40/20 (2020.01); B33Y 70/00 (2014.12); B22F 2201/11 (2013.01); B22F 2301/205 (2013.01); B23K 2103/14 (2018.08)] 9 Claims
OG exemplary drawing
 
1. A preparation method for additive manufacturing titanium alloy, comprising:
S1: printing a plurality of printed samples of additive manufacturing titanium alloy at a fixed thickness t and a fixed scanning spacing h, and a plurality of printing powers P, and a plurality of scanning speeds v, so as to control an initial microvoid size in each printed sample; grinding and polishing the plurality of printed samples; selecting an optimal printed sample with a minimum number of microvoids and a minimum microvoid size and defining a printing state that has optimal printing parameters as parameters under which the optimal printed sample is printed;
S2: obtaining a printed material of additive manufacturing titanium alloy printed according to the printing state; applying an isotropic high pressure argon to the printed material for an isostatic pressing (HIP) treatment at an elevated temperature for a certain period of time, cooling the printed material to a lower temperature in an HIP furnace; and then air cooling the printed material to room temperature to eliminate printing microvoids;
S3: determining a phase transition point of the titanium alloy, holding the temperature for the printed material from S2 at a plurality of temperatures that are higher than the phase transition point of the titanium alloy for a plurality of durations of time for solution treatment and then water cooling to obtain a plurality of solution-treated printed samples; grinding, polishing and corroding the plurality of solution-treated printed samples; and determining a critical temperature and a critical time by comparing the grain sizes and the intragranular lath sizes of the plurality of solution-treated printed samples, wherein at the critical temperature and the critical time the grain size of solution-treated printed samples cease to change and the intragranular lath width becomes thinner; and
S4: aging the solution-treated printed sample at the critical temperature and the critical time.