US 11,951,560 B2
Wire and arc additive manufacturing method for titanium alloy
Changshu He, Shenyang (CN); Jingxun Wei, Shenyang (CN); Ying Li, Shenyang (CN); Zhiqiang Zhang, Shenyang (CN); Ni Tian, Shenyang (CN); and Gaowu Qin, Shenyang (CN)
Assigned to NORTHEASTERN UNIVERSITY, Shenyang (CN)
Appl. No. 17/289,168
Filed by NORTHEASTERN UNIVERSITY, Shenyang (CN)
PCT Filed Jan. 17, 2020, PCT No. PCT/CN2020/072673
§ 371(c)(1), (2) Date Apr. 27, 2021,
PCT Pub. No. WO2020/156228, PCT Pub. Date Aug. 6, 2020.
Claims priority of application No. 201910079333.0 (CN), filed on Jan. 28, 2019.
Prior Publication US 2021/0402507 A1, Dec. 30, 2021
Int. Cl. B23K 20/00 (2006.01); B23K 9/04 (2006.01); B23K 20/12 (2006.01); B23K 20/233 (2006.01); B33Y 40/20 (2020.01); B33Y 70/00 (2020.01); B23K 103/14 (2006.01)
CPC B23K 20/1255 (2013.01) [B23K 9/042 (2013.01); B23K 20/233 (2013.01); B33Y 40/20 (2020.01); B33Y 70/00 (2014.12); B23K 2103/14 (2018.08)] 7 Claims
OG exemplary drawing
 
1. A wire and arc additive manufacturing (WAAM) method for a titanium alloy, the method comprising the steps:
(a) drawing a part model through three-dimensional (3D) drawing software; performing layered slicing on the part model through slicing software to acquire layered slice data; simulating the layered slice data through simulation software to generate a robot control code; importing the robot control code into a welding robot; performing, by the welding robot, a WAAM process with a titanium alloy on a pre-prepared base plate to form a multi-layer deposited metal including a total of 2 to 4 layers; applying, during the forming process, cooling and rolling to a side wall of the multi-layer deposited metal through a cooling and rolling device, wherein during cooling and rolling, 10-40° C. cooling water flows at a rate of 1,000-3,000 L/h, and a rolling stress on the multi-layer deposited metal is 50-400 MPa;
(b) milling side and top surfaces of the multi-layer deposited metal;
(c) performing, by friction stir processing (FSP) equipment, an FSP process on the multi-layer deposited metal after milling, and applying cooling and rolling to the side wall of the multi-layer deposited metal through the cooling and rolling device during the FSP process, wherein during cooling and rolling, 10-40° C. cooling water flows at a rate of 1,000-3,000 L/h, and a rolling stress on the multi-layer deposited metal is 100-800 MPa;
(d) finish-milling the top surface of the multi-layer deposited metal to make the treatment surface smooth for a WAAM process in the next step; and
(e) repeating the above steps cyclically until the multi-layer deposited metal is formed into an additive part with a preset shape and size,
wherein the cooling and rolling device comprises a roller, a heat conducting cylinder and a heat conducting outer ring; the heat conducting outer ring is rotatably assembled on an outer wall of the heat conducting cylinder; the heat conducting cylinder is provided with an inner cavity; an upper surface of the heat conducting cylinder is provided with a cooling water inlet communicating with the inner cavity; a lower surface of the heat conducting cylinder is provided with a cooling water outlet communicating with the inner cavity; the roller is vertically fixed and assembled at a center of the upper surface of the heat conducting cylinder, and the roller moves synchronously with a welding gun of the welding robot and a stirring tool of the FSP device.