	US 12,110,808 B2
	Titanium alloy blade tip with high adhesion strength and wear-resistant protective coating and preparation method thereof
Yueguang Yu, Beijing (CN); Lingfeng Huang, Beijing (CN); Jianming Liu, Beijing (CN); Shuai Wang, Beijing (CN); Xiaoliang Lu, Beijing (CN); Yinghui Cai, Beijing (CN); Rui Guo, Beijing (CN); Tong Liu, Beijing (CN); Dan Guo, Beijing (CN); and Chao Wu, Beijing (CN)
Assigned to BGRIMM Technology Group, Ltd., Beijing (CN); and BGRIMM Advanced Materials Science & Technology Co., Ltd., Beijing (CN)
Filed by BGRIMM Technology Group, Ltd., Beijing (CN); and BGRIMM Advanced Materials Science & Technology Co., Ltd., Beijing (CN)
Filed on Nov. 17, 2023, as Appl. No. 18/512,227.
Claims priority of application No. 202211458896.9 (CN), filed on Nov. 18, 2022.
Prior Publication US 2024/0167386 A1, May 23, 2024
Int. Cl. F01D 5/28 (2006.01); B05D 1/12 (2006.01); C23C 4/073 (2016.01); C23C 28/02 (2006.01); C25D 5/14 (2006.01); C25D 7/00 (2006.01); C25D 15/00 (2006.01); F01D 11/12 (2006.01)

CPC F01D 5/288 (2013.01) [B05D 1/12 (2013.01); C23C 4/073 (2016.01); C23C 28/022 (2013.01); C25D 5/14 (2013.01); C25D 7/00 (2013.01); C25D 15/00 (2013.01); F01D 11/122 (2013.01)]

7 Claims

1. A preparation method of a titanium alloy blade tip with a wear-resistant protective coating, comprising:

step (1) spraying M-chromium-aluminum-yttrium (MCrAlY) alloy powder on a surface of a titanium alloy blade tip by a high velocity oxygen fuel (HVOF) spraying process at a spraying distance in a range of 300-400 millimeters (mm) to obtain the titanium alloy blade tip with a MCrAlY layer on the surface; wherein M is one of nickel (Ni) and nickel-cobalt (NiCo);

step (2) pre-plating Ni at a current density in a range of 6-10 amperes per square decimeter (A/dm²) on the titanium alloy blade tip with the MCrAlY layer to obtain a pre-plated titanium alloy blade tip;

step (3) placing the pre-plated titanium alloy blade tip in a Watt solution, covering a surface of the pre-plated titanium alloy blade tip obtained in the step (2) with abrasive particles, and then performing composite electroplating at a current density in a range of 0.5-2 A/dm², so as to obtain the titanium alloy blade tip with the wear-resistant protective coating.