Wang Chaozhong, Lei Naiyi, Ping Xianzhong, Li Wei, Yi Yanliang
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The Influence of Nb Addition on the Microstructure, Mechanical Properties and Abrasion Resistance of Medium-Carbon Low-Alloy Steel
Adding 0.175 wt.% Nb to improve the service life of medium-carbon low-alloy steel, and the microstructure, mechanical properties and abrasion resistance are systematically studied. The results showed that fine and dispersed (Nb,Ti)C carbides formed in the steel after the Nb addition, and the average width of matrix lath decreased from 71.3 to 28.1 nm. The hardness, impact absorption energy and tensile strength of the steel were increased to 56.5 HRC, 7.1 J and 1960.9 MPa, respectively. Moreover, the second phase strengthening and refining strengthening caused by the Nb addition facilitate abrasion resistance of the steel increasing by 7.9%. Accordingly, it has been proven that abrasion resistance of the medium-carbon low-alloy steel reaches the American ZG50Ni2Si2CrMo steel, which is conducive to the development of medium-carbon low-alloy steel.
期刊介绍：
ASM International''s Journal of Materials Engineering and Performance focuses on solving day-to-day engineering challenges, particularly those involving components for larger systems. The journal presents a clear understanding of relationships between materials selection, processing, applications and performance.
The Journal of Materials Engineering covers all aspects of materials selection, design, processing, characterization and evaluation, including how to improve materials properties through processes and process control of casting, forming, heat treating, surface modification and coating, and fabrication.
Testing and characterization (including mechanical and physical tests, NDE, metallography, failure analysis, corrosion resistance, chemical analysis, surface characterization, and microanalysis of surfaces, features and fractures), and industrial performance measurement are also covered
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