Materials Transactions Online

Materials Transactions, Vol.58 No.04 (2017) pp.619-622
© 2017 The Japan Institute of Metals and Materials

Chromium-Based Duplex Alloy for Wear and Corrosion Resistant Cladding

Tomonori Kimura1, Naoya Tokoo1, Makoto Ogata1, Masafumi Nojima1 and Kosuke Kuwabara1

1Center for Technology Innovation-Materials, R&D Group, Hitachi Ltd., Hitachi 319-1292, Japan

A chromium-based duplex alloy is proposed for a novel class of alloys for hot and harsh environments. The alloy is defined as a duplex microstructure comprised of a hard and high-strength chromium-based BCC (α) phase and a ductile FCC (γ) phase to overcome the brittleness of the conventional α-Cr alloy. The candidate composition of the alloy was selected from a Cr-Fe-Ni ternary system, and the mechanical properties were evaluated. The abrasion and corrosion properties of a surface-remelted chromium-based duplex alloy were compared with those of a Co-based cladding alloy (Bishilite® No. 6), and the results suggested its potential use as a wear and corrosion resistant cladding.

[doi:10.2320/matertrans.M2016339]

(Received 2016/09/26; Accepted 2017/01/30; Published 2017/03/25)

Keywords: chromium alloy, duplex alloy, cladding alloy, hot and harsh environments, abrasion, wear, corrosion

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