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MICROSTRUCTURE OF BORONIZED PM Cr-V COLD WORK LEDEBURITIC TOOL STEEL

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Author(s): Peter Jurči | Mária Hudáková

Journal: Materials Engineering
ISSN 1335-0803

Volume: 17;
Issue: 4;
Start page: 20;
Date: 2010;

ABSTRACT
The PM Vanadis 6 cold work tool steel has been boronized at various processing parameters, austenitized, quenched and tempered to a core hardness of 700 HV. Microstructure, phase constitution and microhardness of boronized layers were investigated. It was found that the boronized layers are of two-phase FeB/Fe2B constitution, with an addition of small portion of CrB. Below the boronized layer, intermediate region with elevated carbides ratio was developed. Boronized layers contain also carbides, as a result of the fact that they did not undergo dissolution in the austenite during processing. The hardness of compound layers ranged between 1850 and 2100 HV 0.1 for the FeB-region and between 1750 and 1850 HV 0.1 for the Fe2B-region, respectively.
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