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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 395Microstructure and Microhardness of Powder...

Microstructure and Microhardness of Powder Boronized Vanadis 6 Steel

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Abstract:

A Cr-V ledeburitic steel Vanadis 6 was powder boronized for different durations, austenitized, quenched and tempered. All the boronized layers are two-phased, i.e. they are formed by MeB and Me₂B compounds. The thickness of boronized compound layers increased moderately with boronizing time. The thickness of MeB individual layer increases more rapidly, and it makes up to 50% of total layer thickness when boronized for 150 min. Boronized layers contain enhanced amount of chromium but they are almost free of other alloying elements. The MeB compound has a microhardness of around 1860 HV 0.1 after short – time boronizing but its microhardness exceeded 2100 HV 0.1 after long – time processing. The microhardness of Me₂B was correspondingly lower, its values were around 1760 – 1850 HV 0.1. Transient region manifested enhanced amount of carbides, resulting from carbon transport from growing boronized layers towards the substrate. This phenomenon was reflected in elevated hardness compared to the substrate.

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Periodical:

Defect and Diffusion Forum (Volume 395)

Pages:

73-84

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.395.73

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Online since:

August 2019

Authors:

Mária Hudáková*, Peter Jurči

Keywords:

Boride Compounds, Microhardness, Microstructure, Powder Boronizing, Vanadis 6 Steel

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* - Corresponding Author

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