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Volume 10
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10.3390/met10030373
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Article

Interface Characteristics and Properties of a High-Strength Corrosion-Resistant Stainless Steel Clad Rebar

by
Xuming Liu
*,
Guanghong Feng
,
Xin Liu
,
Baoshan Wang
,
Hongliang Zhang
and
Jian Ma
Metallurgical Technology Institute, Central Iron and Steel Research Institute, Beijing 100081, China
*
Author to whom correspondence should be addressed.
Metals 2020, 10(3), 373; https://doi.org/10.3390/met10030373
Submission received: 29 December 2019 / Revised: 10 March 2020 / Accepted: 11 March 2020 / Published: 13 March 2020
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Abstract

This paper aims at manufacturing stainless steel clad (SSC) rebars by metal deposition and a hot rolling method as well as characterizing its interface features and mechanical properties. The interface of the SSC rebar is relatively flat and clean, exhibiting a metallurgical bonding state at the microscale. Decarburization occurred at the interface in the carbon steel side of the SSC rebar. The diffusion of C, Cr, as well as Mn was measured across the interface of the SSC rebar, and the diffusion distance of Cr and Mn was found at 32 µm and 25 µm, respectively. The Vickers hardness testing in the transition zone of the SSC rebar near the carbon side showed 545 HV0.2 due to the martensite phase formed by the diffusion of key elements C, Cr, and Mn. The microstructure in the transition zone near the stainless steel reveals the duplex structure of martensite and ferrite. The carbide precipitations were observed near the interface, both in the transition zone and in the base metal of the stainless steel zone. The yield strength, tensile strength, and elongation of the SSC rebar were found as 423 MPa, 602 MPa, and 22%. No macroscopic crack was observed after the positive or negative bending tests.
Keywords: metal deposition; hot rolling; interface; diffusion distance; mechanical properties; SSC rebar; carbide; martensite; Vickers hardness; bending metal deposition; hot rolling; interface; diffusion distance; mechanical properties; SSC rebar; carbide; martensite; Vickers hardness; bending

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MDPI and ACS Style

Liu, X.; Feng, G.; Liu, X.; Wang, B.; Zhang, H.; Ma, J. Interface Characteristics and Properties of a High-Strength Corrosion-Resistant Stainless Steel Clad Rebar. Metals 2020, 10, 373. https://doi.org/10.3390/met10030373

AMA Style

Liu X, Feng G, Liu X, Wang B, Zhang H, Ma J. Interface Characteristics and Properties of a High-Strength Corrosion-Resistant Stainless Steel Clad Rebar. Metals. 2020; 10(3):373. https://doi.org/10.3390/met10030373

Chicago/Turabian Style

Liu, Xuming, Guanghong Feng, Xin Liu, Baoshan Wang, Hongliang Zhang, and Jian Ma. 2020. "Interface Characteristics and Properties of a High-Strength Corrosion-Resistant Stainless Steel Clad Rebar" Metals 10, no. 3: 373. https://doi.org/10.3390/met10030373

APA Style

Liu, X., Feng, G., Liu, X., Wang, B., Zhang, H., & Ma, J. (2020). Interface Characteristics and Properties of a High-Strength Corrosion-Resistant Stainless Steel Clad Rebar. Metals, 10(3), 373. https://doi.org/10.3390/met10030373

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