Effect of Alloy Elements on Eutectic Carbide Morphology for High-speed Tool Steel

DOI Web Site 19 References Open Access
  • Fukumoto Shiho
    Metallurgical Research Laboratory, Hitachi Metals, Ltd., now Proterial, Ltd.
  • Miyahara Hirofumi
    Department of Materials, Faculty of Engineering, Kyushu University

Bibliographic Information

Other Title
  • 高速度工具鋼の共晶炭化物の形態に及ぼす合金元素の影響

Search this article

Description

<p>Effect of alloying elements on the composition distribution, morphology and volume fraction of eutectic carbides were investigated for high-speed tool steels with uniform hardness from 68 to 70HRC after hot working and quenching and tempering. The stability of eutectic carbides at high temperature was also evaluated. M2C, M6C and MC eutectic carbide are observed in as-cast samples similar to the general high-speed tool steels. M2C type carbide increases in volume with increasing Si and V contents, and M6C and MC carbides appear with increasing W and V contents. The amount of M2C eutectic carbide varies with the composition in liquid phase just prior to eutectic solidification. The morphology of the eutectic carbide changes from fine fiber or lamellar type to coarse lamellar or feather type, and the interlayer spacing of eutectic carbide tends to increase with increasing the area fraction of M2C eutectic carbide. Moreover, after heat treatment at 1140°C for 16 hours, some M2C carbides remain stabled but MC and M6C carbide appears.</p>

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 109 (4), 311-322, 2023

    The Iron and Steel Institute of Japan

References(19)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top