Effect of Vacuum Carburizing Time on Microstructure and Mechanical Properties of Tantalum Carbide Layer

Chongqing Di; Xiaodong Yan; Xuming Lv; Chao Yan; Wei Ye; Defu Li

doi:10.1007/s12540-020-00934-z

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자료유형: 학술저널

저자정보: Chongqing Di (GRINM Group Co. Ltd) Xiaodong Yan (GRINM Group Co. Ltd) Xuming Lv (Science and Technology on Particle Transport and Separation Laboratory) Chao Yan (Science and Technology on Particle Transport and Separation Laboratory) Wei Ye (GRINM Group Co. Ltd) Defu Li (GRINM Group Co. Ltd)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.12

발행연도: 2021.12

수록면: 5,008 - 5,016 (9page)

DOI: 10.1007/s12540-020-00934-z

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A (TaC/Ta2C) carbide bilayer is obtained by vacuum carburizing technology on the surface of Ta substrate at 1673 K for 4,8, and 12 h. XRD, SEM and EBSD are utilized to investigated phase composition and the microstructure. The mechanicalproperties of the Ta and tantalum carburized materials are studied with Vicker’s hardness tester and nanoindenter, adhesionautomatic scratch tester, reciprocating friction and wear testing machine. The results show that the outside surface phasecomposition of the carbide bilayer is all the TaC phase. With the increase of the carburizing time from 4 to 12 h, the averagegrain size from approximately 500 nm to 10 μm, the thickness of the carbide bilayer is from 11 to 20 μm. The microhardnessincreases from 104.1 to 322.5 HV, and the elastic modulus are from 466.6 to 615.3 GPa. Adhesive strength is best at 8 h,49.1 N, compared to 19 N at 4 h and 36.5 N at 12 h. The friction and wear coefficient of Ta fluctuates significantly between0.6 and 1.0, after carburizing treatment, the friction and wear coefficient fluctuates smoothly, and the wear resistance is wellimproved.

#Vacuum carburization #Mechanical property #Nanoindentation #Adhesion strength #Friction and resistance

참고문헌 (36)

참고문헌 신청

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