Structure and Oxidation Behavior of a Chromium Coating on Zr Alloy Cladding Tubes Deposited by High-Speed Laser Cladding

被引：3

作者：

Wang, Wei ^{[1
]}

Lou, Li-Yan ^{[1
,2
]}

Liu, Kang-Cheng ^{[2
]}

Chen, Tian-Hui ^{[1
]}

Bi, Zhi-Jiang ^{[1
]}

Liu, Yi ^{[2
]}

Li, Cheng-Xin ^{[2
]}

机构：

[1] Tianjin Univ Technol & Educ, Natl local Joint Engn Lab Intelligent Mfg Oriented, Tianjin 300222, Peoples R China

[2] Xi An Jiao Tong Univ, Sch Mat Sci & Engn, Xian 710049, Peoples R China

来源：

JOURNAL OF THERMAL SPRAY TECHNOLOGY | 2024年 / 33卷 / 01期

关键词：

Cr coating; high-speed laser cladding; microstructure; oxidation behavior; Zr alloy cladding tube; HIGH-TEMPERATURE OXIDATION; ACCIDENT-TOLERANT FUELS; CR-COATED ZIRCALOY-4; ZIRCONIUM ALLOYS; DIFFUSION; RESISTANCE; CORROSION; SURFACE; MICROSTRUCTURES; PERFORMANCE;

D O I：

10.1007/s11666-023-01698-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A dense and continuous Cr coating with a thickness of approximately 140 mu m was successfully deposited on the surface of a thin-walled Zr alloy cladding tube using high-speed laser cladding technology in this study. The microstructure, phase composition, microhardness, and resistance to high-temperature oxidation of the coating were investigated. The experimental results showed that the Cr coating exhibited high-strength metallurgical bond with the Zr alloy substrate, forming a narrow heat-affected zone with a thickness of 25 mu m, and the coating consists of ZrCr2 and alpha-Zr phase. The average microhardness of the coating was 589 HV0.05, about 2.3 times that of the substrate. After oxidation at 1200 degrees C for 1200 s in air, with the formation of complete and dense protective Cr2O3 scale, the Cr-coated Zr alloy cladding tube showed better high-temperature oxidation resistance than uncoated tube.

引用

页码：246 / 259

页数：14

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