Hard Surface Layers by Pack Boriding and Gaseous Thermo-Reactive Deposition and Diffusion Treatments

Thomas Lundin Christiansen, Federico Bottoli, Kristian Vinter Dahl, N. B. Gammeltoft-Hansen, M. B. Laursen, Marcel A. J. Somers

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Abstract

Thermo-reactive deposition and diffusion (TRD) and boriding are thermochemical processes that result in very high surface hardness by conversion of the surface into carbides/nitrides and borides, respectively. These treatments offer significant advantages in terms of hardness, adhesion, tribo-oxidation, and high wear resistance compared to other conventional surface hardening treatments. In this work, 4 different materials, ARMCO, AISI 409, Uddeholm ARNE® (AISI O1 equivalent), and VANADIS® 6 PM steel representing different classes of alloys, i.e., pure iron, stainless steel, and tool steels, were subjected to TRD (chromizing and titanizing) and boriding treatments. For the steels with low carbon content, chromizing results in surface alloying with chromium, i.e., formation of a (soft) “stainless” surface zone. Steels containing higher levels of carbon form chromium carbide (viz. Cr23C6, Cr7C3) layers with hardnesses up to 1800 HV. Titanizing of ARNE tool steel results in a surface layer consisting of TiC with a hardness of approximately 4000 HV. Duplex treatments, where boriding is combined with subsequent (TRD) titanizing, result in formation of hard TiB2 on top of a thick layer of Fe-based borides. The obtained surface layers were characterized with X-ray diffraction, scanning electron microscopy, reflected light microscopy, and micro-indentation.
Original languageEnglish
JournalMaterials Performance and Characterization
Volume6
Issue number4
Pages (from-to)1-17
ISSN2165-3992
DOIs
Publication statusPublished - 2017

Keywords

  • Boriding
  • Thermo-reactive deposition and diffusion (TRD)
  • Chromizing
  • Titanizing
  • TiB2

Cite this

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title = "Hard Surface Layers by Pack Boriding and Gaseous Thermo-Reactive Deposition and Diffusion Treatments",
abstract = "Thermo-reactive deposition and diffusion (TRD) and boriding are thermochemical processes that result in very high surface hardness by conversion of the surface into carbides/nitrides and borides, respectively. These treatments offer significant advantages in terms of hardness, adhesion, tribo-oxidation, and high wear resistance compared to other conventional surface hardening treatments. In this work, 4 different materials, ARMCO, AISI 409, Uddeholm ARNE{\circledR} (AISI O1 equivalent), and VANADIS{\circledR} 6 PM steel representing different classes of alloys, i.e., pure iron, stainless steel, and tool steels, were subjected to TRD (chromizing and titanizing) and boriding treatments. For the steels with low carbon content, chromizing results in surface alloying with chromium, i.e., formation of a (soft) “stainless” surface zone. Steels containing higher levels of carbon form chromium carbide (viz. Cr23C6, Cr7C3) layers with hardnesses up to 1800 HV. Titanizing of ARNE tool steel results in a surface layer consisting of TiC with a hardness of approximately 4000 HV. Duplex treatments, where boriding is combined with subsequent (TRD) titanizing, result in formation of hard TiB2 on top of a thick layer of Fe-based borides. The obtained surface layers were characterized with X-ray diffraction, scanning electron microscopy, reflected light microscopy, and micro-indentation.",
keywords = "Boriding, Thermo-reactive deposition and diffusion (TRD), Chromizing, Titanizing, TiB2",
author = "Christiansen, {Thomas Lundin} and Federico Bottoli and Dahl, {Kristian Vinter} and Gammeltoft-Hansen, {N. B.} and Laursen, {M. B.} and Somers, {Marcel A. J.}",
year = "2017",
doi = "10.1520/MPC20160106",
language = "English",
volume = "6",
pages = "1--17",
journal = "Materials Performance and Characterization",
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Hard Surface Layers by Pack Boriding and Gaseous Thermo-Reactive Deposition and Diffusion Treatments. / Christiansen, Thomas Lundin; Bottoli, Federico; Dahl, Kristian Vinter; Gammeltoft-Hansen, N. B.; Laursen, M. B.; Somers, Marcel A. J.

In: Materials Performance and Characterization, Vol. 6, No. 4, 2017, p. 1-17.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Hard Surface Layers by Pack Boriding and Gaseous Thermo-Reactive Deposition and Diffusion Treatments

AU - Christiansen, Thomas Lundin

AU - Bottoli, Federico

AU - Dahl, Kristian Vinter

AU - Gammeltoft-Hansen, N. B.

AU - Laursen, M. B.

AU - Somers, Marcel A. J.

PY - 2017

Y1 - 2017

N2 - Thermo-reactive deposition and diffusion (TRD) and boriding are thermochemical processes that result in very high surface hardness by conversion of the surface into carbides/nitrides and borides, respectively. These treatments offer significant advantages in terms of hardness, adhesion, tribo-oxidation, and high wear resistance compared to other conventional surface hardening treatments. In this work, 4 different materials, ARMCO, AISI 409, Uddeholm ARNE® (AISI O1 equivalent), and VANADIS® 6 PM steel representing different classes of alloys, i.e., pure iron, stainless steel, and tool steels, were subjected to TRD (chromizing and titanizing) and boriding treatments. For the steels with low carbon content, chromizing results in surface alloying with chromium, i.e., formation of a (soft) “stainless” surface zone. Steels containing higher levels of carbon form chromium carbide (viz. Cr23C6, Cr7C3) layers with hardnesses up to 1800 HV. Titanizing of ARNE tool steel results in a surface layer consisting of TiC with a hardness of approximately 4000 HV. Duplex treatments, where boriding is combined with subsequent (TRD) titanizing, result in formation of hard TiB2 on top of a thick layer of Fe-based borides. The obtained surface layers were characterized with X-ray diffraction, scanning electron microscopy, reflected light microscopy, and micro-indentation.

AB - Thermo-reactive deposition and diffusion (TRD) and boriding are thermochemical processes that result in very high surface hardness by conversion of the surface into carbides/nitrides and borides, respectively. These treatments offer significant advantages in terms of hardness, adhesion, tribo-oxidation, and high wear resistance compared to other conventional surface hardening treatments. In this work, 4 different materials, ARMCO, AISI 409, Uddeholm ARNE® (AISI O1 equivalent), and VANADIS® 6 PM steel representing different classes of alloys, i.e., pure iron, stainless steel, and tool steels, were subjected to TRD (chromizing and titanizing) and boriding treatments. For the steels with low carbon content, chromizing results in surface alloying with chromium, i.e., formation of a (soft) “stainless” surface zone. Steels containing higher levels of carbon form chromium carbide (viz. Cr23C6, Cr7C3) layers with hardnesses up to 1800 HV. Titanizing of ARNE tool steel results in a surface layer consisting of TiC with a hardness of approximately 4000 HV. Duplex treatments, where boriding is combined with subsequent (TRD) titanizing, result in formation of hard TiB2 on top of a thick layer of Fe-based borides. The obtained surface layers were characterized with X-ray diffraction, scanning electron microscopy, reflected light microscopy, and micro-indentation.

KW - Boriding

KW - Thermo-reactive deposition and diffusion (TRD)

KW - Chromizing

KW - Titanizing

KW - TiB2

U2 - 10.1520/MPC20160106

DO - 10.1520/MPC20160106

M3 - Journal article

VL - 6

SP - 1

EP - 17

JO - Materials Performance and Characterization

JF - Materials Performance and Characterization

SN - 2165-3992

IS - 4

ER -