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Improving Wear Properties of High-Chromium Cast Iron by Manganese Alloying

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Abstract

High-chromium cast irons are widely needed by several industrial areas where wear is the dominant environment. They are used in mining, cement- and steel-making plants, and many others. Their microstructure consists of netted eutectic carbides embedded in an austenitic or martensitic matrix. The wear behaviour is mainly controlled by the carbides shape and also matrix type. Several scientific works try to improve the wear behaviour and to optimize the life service of this cast iron by using various techniques. In this work, we intend to study the effect of manganese content on the microstructure properties and wear behaviour of a 15 % chromium white cast iron used for ball mill production. The present work treats the wear behaviour, after heat treatment, of a manganese-alloyed high-chromium cast iron. A set of specimens were melted in an induction oven by varying the manganese content in the range 0–3 %. Heat-treated samples were analysed by optical microscopy, MEB (SEM) scanning electron microscopy, differential scanning calorimetry, and X-ray diffraction and were wear tested by abrasion and friction. Increasing the manganese addition gave a structural evolution and a wear resistance improvement. The best wear behaviour is obtained with samples containing 3 % Mn.

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Acknowledgments

The LM2S of Badji Mokhtar University and CREDEG laboratory teams are greatly acknowledged for their help in samples characterization.

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Authors and Affiliations

  1. Foundry Laboratory, Badji Mokhtar University, Annaba, Algeria

    Ali Hadji

  2. Research Center in Industrial Technologies CRTI, Algiers, Algeria

    Khedidja Bouhamla

  3. Welding and NDT Research Centre, Cheraga, Algiers, Algeria

    Hichem Maouche

Authors
  1. Ali Hadji
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  2. Khedidja Bouhamla
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  3. Hichem Maouche
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Correspondence to Ali Hadji.

Technical Review and Discussion

Technical Review and Discussion

Improving Wear Properties of High-Chromium Cast Iron by Manganese Alloying

Ali Hadji; Badji Mokhtar University, Annaba, Algeria

Khedidja Bouhamla, Hichem Maouche; Welding and NDT Research Centre, Cheraga, Algiers, Algeria

Reviewer:

Please explain why the wear resistance of the base iron is so much poorer than the Mn-alloyed irons. Apparently, microstructure does not fully explain the differences.

Authors:

The revised text provides more complete explanation. Optical microstructures are a qualitative characterization; they do not give exactly the changes made by manganese addition but exhibit the secondary precipitation which occurs on the matrix after manganese addition.

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Hadji, A., Bouhamla, K. & Maouche, H. Improving Wear Properties of High-Chromium Cast Iron by Manganese Alloying. Inter Metalcast 10, 43–55 (2016). https://doi.org/10.1007/s40962-015-0003-5

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  • DOI: https://doi.org/10.1007/s40962-015-0003-5

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