Tribological and oxidation behaviors of TiN reinforced Co matrix composite coatings on Inconel718 alloy by laser cladding

被引：22
作者：
He, Bo-Ming [1 ]
Liu, Xiu-Bo [1 ]
Zhang, Fei-Zhi [1 ]
Zhang, Shi-Yi [1 ]
Liu, Zhi-Yuan [1 ]
Zhang, Shi-Hong [2 ]
机构：
[1] Cent South Univ Forestry & Technol, Hunan Prov Key Lab Mat Surface Interface Sci & Te, Changsha 410004, Peoples R China
[2] Anhui Univ Technol, Key Lab Green Fabricat & Surface Technol Adv Met, Minist Educ, Maanshan 243002, Peoples R China
来源：
TRIBOLOGY INTERNATIONAL | 2023年 / 188卷
基金：
中国国家自然科学基金;
关键词：
Inconel718; Laser cladding; Co; TiN composite coating; Tribological behavior; Oxidation resistance; HIGH-TEMPERATURE OXIDATION; WEAR-RESISTANCE; MICROSTRUCTURE; ABRADABILITY; EVOLUTION;
D O I：
10.1016/j.triboint.2023.108781
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
To improve the tribological properties of Inconel718 superalloy under harsh conditions such as high temperature, the Co/TiN composite coatings were created by laser cladding on its surface. Phase analysis, microstructure morphology, and microhardness, wear, and oxidation experiments were used to evaluate the tribological behaviors of the composite coatings at room temperature (RT) and 600 degrees C, as well as the oxidation resistance at 800 degrees C. The results of phase analysis show that the coatings mainly contain & gamma;-Co, (Fe,Ni) solid solution, intermetallics FeNi3 and TiN. Among the three coatings, Co-6%TiN coating has the highest microhardness, which is 1.4 times that of the substrate (279.3 HV0.5). In addition, it also shows the best wear resistance and oxidation resistance. The wear rate is 1.36 x 10  5 mm3/(N & BULL;m) and 0.94 x 10  5 mm3/(N & BULL;m) at RT and 600 degrees C, and the oxidation rate constant is 8.7634 mg2 & BULL;cm  4 & BULL;h  1, with the wear mechanism of plastic deformation, abrasive and oxidation wear. This work investigated Co/TiN composite coating at high temperatures for proposing a novel solution for improving the properties of Inconel718.
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页数：12
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