US 12,264,385 B2
High-entropy alloy coating and preparation method and use thereof
Xingchen Yan, Guangdong (CN); Cheng Chang, Guangdong (CN); Bingwen Lu, Guangdong (CN); Changguang Deng, Guangdong (CN); and Min Liu, Guangdong (CN)
Assigned to Institute of New Materials, Guangdong Academy of Sciences, Guangzhou (CN)
Appl. No. 17/926,993
Filed by Institute of New Materials, Guangdong Academy of Sciences, Guangdong (CN)
PCT Filed Sep. 30, 2022, PCT No. PCT/CN2022/123032
§ 371(c)(1), (2) Date Nov. 21, 2022,
PCT Pub. No. WO2023/056890, PCT Pub. Date Apr. 13, 2023.
Claims priority of application No. 202111169864.2 (CN), filed on Oct. 8, 2021.
Prior Publication US 2024/0254599 A1, Aug. 1, 2024
Int. Cl. C22C 30/00 (2006.01); B22F 9/10 (2006.01); B23K 26/34 (2014.01); B23K 35/30 (2006.01); B23K 103/04 (2006.01)
CPC C22C 30/00 (2013.01) [B22F 9/10 (2013.01); B23K 26/34 (2013.01); B23K 35/3086 (2013.01); B23K 2103/04 (2018.08)] 10 Claims
 
1. A preparation method of a high-entropy alloy (HEA) coating on a precision mold, an offshore component, or a drilling rod, comprising: conducting laser cladding with an HEA powder on a surface of the precision mold, the offshore component, the drilling rod to obtain the HEA coating;
wherein the HEA is a FeCoCrNiAl0.5Ti0.5 alloy, and the HEA comprises the following chemical components in atomic percentage: Al: 10.01% to 12.30%, Co: 18.1% to 22.5%, Cr: 18.05% to 20.12%, Fe: 18.77% to 21.02%, Ni: 19.21% to 20.99%, and Ti: 8.43% to 11.5%;
the laser cladding is conducted with a laser power of 1,800 W to 2,400 W, a scanning speed of 300 mm/min to 800 mm/min, an overlap rate of 50% to 70%, and a powder feeding speed of 4 rpm to 6 rpm;
the HEA powder suitable for the laser cladding has a particle size of 90 μm to 108 μm; and
the HEA powder is fabricated through the following steps: forging a consumable electrode rod from raw materials, melting a surface of the consumable electrode rod with a plasma gun, while spinning the rod under centrifugation to obtain tiny droplets, cooling the tiny droplets into a spherical powder, and collecting to acquire the HEA powder, wherein the plasma gun is used for melting with a flame temperature of the plasma gun maintained at 1,650° C. or higher.