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Microstructural Evaluation of Friction Stir Processed D2 Tool Steel

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Abstract:

Modification of AISI D2 tool steel was conducted by friction stir processing (FSP). Effects of tool rotational speed on microstructural evolution and mechanical properties were investigated. Though coarse primary carbides in the size of 10-50 m were observed before FSP, fine carbides smaller than 20 m and martensitic matrix with fine grains were obtained after FSP. High hardness of over 900 HV, higher than the hardness in conventional D2 tool steel, was achieved under the condition of moderate rotational speed.

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Periodical:

Materials Science Forum (Volume 735)

Pages:

422-426

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.735.422

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Online since:

December 2012

Authors:

Toru Nagaoka, Hiroyuki Watanabe, Masao Fukusumi, Yusuke Kitamura, Tadashi Mizuno, Genryu Abe, Yoshiaki Morisada, Hidetoshi Fujii

Keywords:

Carbide Particle, Friction Stir Processing (FSP), Microstructural Refinement, Tool Steel

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