Acta Metall Sin  2011, Vol. 47 Issue (9): 1188-1194    DOI: 10.3724/SP.J.1037.2011.00262

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QUANTITATIVE RELATIONSHIPS BETWEEN MICROSTRUCTURE PARAMETERS AND MECHANICAL PROPERTIES OF ULTRAFINE CEMENTED CARBIDES

ZHAO Shixian, SONG Xiaoyan, LIU Xuemei, WEI Chongbin, WANG Haibin, GAO Yang

Key Laboratory of Advanced Functional Materials, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124

ZHAO Shixian SONG Xiaoyan LIU Xuemei WEI Chongbin WANG Haibin GAO Yang. QUANTITATIVE RELATIONSHIPS BETWEEN MICROSTRUCTURE PARAMETERS AND MECHANICAL PROPERTIES OF ULTRAFINE CEMENTED CARBIDES. Acta Metall Sin, 2011, 47(9): 1188-1194.

Abstract References Related Articles Recommended Metrics Download:  PDF(1009KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The microstructures of ultrafine WC-Co cemented carbides were characterized and analyzed by stereological methods. The quantitative relationships between the mechanical properties and microstructure parameters, such as the mean grain size dWC, mean free path LCo and contiguity CWC-WC, were obtained. The calculated results of mechanical properties agree well with the experimental measurements. With the equivalent contiguity, the Vickers hardness of ultrafine cemented carbides has linear relationships with dWC-1/2 and LCo-1/2 and the fracture toughness KIC has deterministic relationships with dWC-1/2 and LCo-1/2, respectively. With certain Co content and mean grain size, the transverse rupture strength decreases with the increase of contiguity. Especially when the contiguity is above 0.5, the strength decreases obviously. The present results may be used as criteria to optimize the microstructure and to improve mechanical properties of ultrafine cemented carbides. Key words:  ultrafine cemented carbide      stereological characterization      microstructure parameter      mechanical property      Received:  25 April 2011      ZTFLH:  TB125.3   Fund:  Supported by Special Preliminary Study Item of National Basic Research Program of China (No.2011CB612207), Beijing Natural Science Foundation (No.2112006) and Fund of State Key Laboratory of Powder Metallurgy of Central South University Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors DIAO Shi-Xian SONG Xiao-Yan LIU Xue-Mei WEI Chong-Bin YU Hai-Bin GAO Yang URL:  https://www.ams.org.cn/EN/10.3724/SP.J.1037.2011.00262     OR     https://www.ams.org.cn/EN/Y2011/V47/I9/1188 [1] Gurland J. Trans TMS, 1963; 227: 1146 [2] Huang P Y. 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