The Structure and Properties of Hardening Coatings of Low-Chromium Hard Alloys for Agricultural Machine Parts

Abstract:

A new surfacing material consisting of the Fe-Si-Cr-Cu-C-B system sparingly alloyed with chromium is proposed for agricultural machine parts hardening by induction surfacing method capable to replace the currently widely used materials like Sormite No. 1, 2, PG-US25/27 and those similar to them. The chromium content in the new material is 4.3 %, which is 3-8 times less than that in analogs. The new material was obtained metallurgically, its phase, chemical composition and properties were investigated. The main phase of the alloy is Ferrosilide FeSi_n, along the grain boundaries of which a carbide phase is precipitated represented by small particles of Cr₂C₃, Cr₇C₃ carbides of regular and acicular shapes, as well as large particles of special chromium carbides (Cr,Fe)₇C₃, (Cr,Fe)₂₃C₆. In terms of the relative content, the carbides present in the new material can be conventionally arranged in the following series: (Cr,Fe)₂₃C₆ > (Cr,Fe)₇C₃ > Cr₇C₃ > Cr₂C₃.

• Periodical: Key Engineering Materials (Volume 910)
• Pages: 864-870
• DOI: https://doi.org/10.4028/p-39k0jv
• Online since: February 2022
• Authors: Vladimir N. Malikov*, Alexey V. Ishkov, Marina V. Polkovnikova, Viktor V. Ivanaisky
• Keywords: Hardening Coatings, Microstructure of the Obtained Material, New Surfacing Material, Research of Materials, Wear-Resistant Alloy

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