EFFECT OF CARBON CONTENT ON MICROSTRUCTURE EVOLUTION AND PROPERTIES OF HYPEREUTECTIC HIGH CHROMIUM CAST IRON

Qiang Guo, Hanguang Fu, Xingye Guo, Zhenguo Xing and Jian Lin
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Qiang Guo: Key Laboratory of Advanced Functional Materials, Ministry of Education, Research Institute of Advanced Materials Processing Technology, Beijing University of Technology, Amount 100, Pingle Garden, Chaoyang District, Beijing 100124, P. R. China
Hanguang Fu: Key Laboratory of Advanced Functional Materials, Ministry of Education, Research Institute of Advanced Materials Processing Technology, Beijing University of Technology, Amount 100, Pingle Garden, Chaoyang District, Beijing 100124, P. R. China
Xingye Guo: Key Laboratory of Advanced Functional Materials, Ministry of Education, Research Institute of Advanced Materials Processing Technology, Beijing University of Technology, Amount 100, Pingle Garden, Chaoyang District, Beijing 100124, P. R. China
Zhenguo Xing: ��Engineering Research Center of Hebei for Abrasion Resistant Metal Matrix Composite, Handan Huiqiao Composite, Material Technology Co., Ltd., Handan 056000, Hebei Province, P. R. China
Jian Lin: Key Laboratory of Advanced Functional Materials, Ministry of Education, Research Institute of Advanced Materials Processing Technology, Beijing University of Technology, Amount 100, Pingle Garden, Chaoyang District, Beijing 100124, P. R. China

Surface Review and Letters (SRL), 2021, vol. 28, issue 10, 1-16

Abstract: This study is to reveal the influence of the amount of carbon content on the microstructure evolution, mechanical properties, and wear properties of Hypereutectic High Chromium Cast Iron (HHCCI). The results indicated that the carbon content plays a key role in the regulation of carbides in the cast iron microstructure. As the amount of carbon content rises, the primary carbides in the cast iron microstructure become apparently coarser, and the volume fraction of carbides gradually increases. The carbide volume fraction reaches 62% when the carbon content is 5wt.%. When the value of the carbon content increases, the accumulation and growth of eutectic carbides in the heat-treated cast iron become more and more obvious. After heat treatment, a large number of secondary carbides will be precipitated from the austenite matrix, in the form of fine particles or short rods, with a dispersed distribution. The macroscopic hardness of HHCCI has increased. When the carbon content is 3.5wt.%, the macroscopic hardness is 61.2 HRC, and when the carbon content becomes 5wt.%, it reaches 64.3 HRC. The wear resistance of HHCCI increases with the value of the carbon content increases. When the carbon content was increased from 3.5wt.% to 5.0wt.%, the wear resistance of the material increased by 85.7%. The wear of HHCCI is mainly adhesive wear and fatigue wear, and the wear morphology is mainly spalling pits and wear debris.

Keywords: Hypereutectic high chromium cast iron; carbon content; microstructure evolution; hardness; wear resistance (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X21500864

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