Quantitative approach to coagulation, coalescence, and polygonization of carbides in the NCWV/D3 tool steel

Nykiel, Tadeusz; Hryniewicz, Tadeusz

doi:10.1007/s11661-000-0211-2

Cited by 13 publications

(9 citation statements)

References 1 publication

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“…In addition, the nature of the carbide particles has been examined by XRD on electrolytically extracted carbides. The extraction of the carbide particles has been made with the help of 5% HCL aqueous solution of specific gravity of 1.19 g cm À3 using a current density of 10 mA cm À2 for a duration of 18-20 h following the report of Nykiel and Hryniewicz [18]. The macro-and microhardness values of the QT and QCT specimens have been measured at 60 kgf and at 50 gf loads, respectively, using a Vickers indenter.…”

Section: Methodsmentioning

confidence: 99%

On the enhancement of wear resistance of tool steels by cryogenic treatment

Das

Dutta

Ray

2008

Philosophical Magazine Letters

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The present article aims to resolve the debate on the degree of benefit of processing tool or die steels by cryogenic treatment. This has been done by measuring transition loads for quenched and tempered die steel with and without cryogenic treatment. The wide range of reported degrees of improvement of wear resistance by cryotreatment is explained by the operative modes and mechanisms of sliding wear considering the wear rate ratio of conventionally treated to cryotreated steels on a two-dimensional map.

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Section: Methodsmentioning

confidence: 99%

On the enhancement of wear resistance of tool steels by cryogenic treatment

Das

Dutta

Ray

2008

Philosophical Magazine Letters

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“…Identification of the exact nature of the carbides was difficult by XRD analysis of the bulk specimens due to their small amount. Therefore, carbide particles were electrolytically extracted from investigated steel specimens following the report of Nykiel and Hryniewicz [17]. XRD analysis of the extracted carbide particles were done in an identical manner to that for bulk specimens.…”

Section: High Speed Tool Steelmentioning

confidence: 99%

Electroslag Remelting of High Technological Steels

Halfa¹,

Reda²

2015

JMMCE

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This work aims at the suitability of electroslag process on production of high technological steels such as Maraging steel, modified high speed tool steel (niobium, high nitrogen, and free nitrogen) has been investigated. The experimental results show that high recovery of alloying elements during electroslag remelting of such steels especially high nitrogen tool steel. The previous results are attributed to the slag used in electroslag protect the molten metal from atmospheric oxygen. Also higher recovery of alloying elements during remelting high nitrogen high speed tool steel are due to partial dissolution of nitrides during remelting of such steel which increase nitrogen content above the molten slag which decrease the partial pressure of oxygen leads to protection of molten metal from further oxidation. Also, the results show that, produced ingots are free from internal pipes, porosity and other surface defects. Microstructure obtained for remelted steels is very fine and well distributed for all steel under investigation. In the case of electroslag remelted Maraging steels lower non-metallic inclusions with very fine inclusions and redistribution retained austenite with very fine structure leads to increasing all tensile properties of investigated steels. In the case of high speed tool steels, also the structure is very fine, well distributed, densely and short carbides with lower non-metallic inclusions contents. High cooling rate accompanying with electroslag process has a great effect on type, morphology and content of carbides precipitated in both nitrogen and niobium modified tool steels.

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“…Identification of the exact nature of the carbides was difficult by XRD analysis of the bulk specimens due to their small amount. Therefore, carbide particles were electrolytically extracted from investigated steel specimens following the report of Nykiel and Hryniewicz 16. XRD analysis of the extracted carbide particles were done in an identical manner to that for bulk specimens.…”

Section: Experimental Workmentioning

confidence: 99%

Characterization of Electroslag Remelted Super Hard High Speed Tool Steel Containing Niobium

Halfa

2013

steel research int.

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In this work, thermodynamical equilibria have been calculated for super hard high speed tool steel (HSS), AISI M41 composition belonging to the multicomponent system Fe-C-Cr-W-Mo-V-Co as well as for its three different variant containing niobium. Some temperature-concentration diagram for both class of alloys are presented and calculated quantities (melting and transformations, amount and composition of phases) are compared with experimental data. Effect of niobium and high cooling rate during electroslag remelting on the precipitated carbides were discussed. In this work, the effect of niobium on morphology of carbides secondary hardening temperature and wear rate of investigated HSSs were studied. This work aims to study the effect of niobium as alloying element on precipitated carbides type and shape, in addition to study the effect of precipitated carbides after full heat treatment on secondary hardening and wear resistance for investigated steels.

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Quantitative approach to coagulation, coalescence, and polygonization of carbides in the NCWV/D3 tool steel

Abstract: carbides behavior in the steels of 2 pct C ϩ 12 pct Cr ϩ additives type in temperatures slightly lesser than solidus 1. G.R. Purdy: Met. Sci. J., 1971, vol. 5, pp. 81-85. temperature. In Reference 6, it was stated that during austeni-2.

Cited by 13 publications

References 1 publication

On the enhancement of wear resistance of tool steels by cryogenic treatment

On the enhancement of wear resistance of tool steels by cryogenic treatment

Electroslag Remelting of High Technological Steels

Characterization of Electroslag Remelted Super Hard High Speed Tool Steel Containing Niobium

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