Surface hardening of AISI 4340 steel by laser linear oscillation scanning

F. Qiu (Corresponding Author), Veli Kujanpää

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

This study investigated the surface hardening of AISI 4340 steel by linear oscillation scanning with a fibre laser. Various frequencies and amplitudes of oscillation were used under laser power of 2020 and 3020 W. Microscopic evaluation was done, and the effect of oscillation frequency on the hardened depth was examined. Hardness profiles were measured along the centre of the irradiated track toward the feeding direction of the laser, across the irradiated width and into the depth below the irradiated surface. The homogeneity of hardness and hardened depth with different processing parameters was investigated. The hardness profiles were compared with the results obtained with conventional single track hardening.
Original languageEnglish
Pages (from-to)569-575
Number of pages6
JournalSurface Engineering
Volume28
Issue number8
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Fingerprint

Steel
hardening
Hardening
hardness
Hardness
steels
Scanning
oscillations
scanning
Lasers
lasers
Fiber lasers
profiles
homogeneity
fiber lasers
evaluation
Processing

Keywords

  • 4340 steel
  • fibre laser
  • hardening
  • multitrack
  • oscillation scanning
  • surface treatment

Cite this

Qiu, F. ; Kujanpää, Veli. / Surface hardening of AISI 4340 steel by laser linear oscillation scanning. In: Surface Engineering. 2012 ; Vol. 28, No. 8. pp. 569-575.
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Surface hardening of AISI 4340 steel by laser linear oscillation scanning. / Qiu, F. (Corresponding Author); Kujanpää, Veli.

In: Surface Engineering, Vol. 28, No. 8, 2012, p. 569-575.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

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AU - Qiu, F.

AU - Kujanpää, Veli

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AB - This study investigated the surface hardening of AISI 4340 steel by linear oscillation scanning with a fibre laser. Various frequencies and amplitudes of oscillation were used under laser power of 2020 and 3020 W. Microscopic evaluation was done, and the effect of oscillation frequency on the hardened depth was examined. Hardness profiles were measured along the centre of the irradiated track toward the feeding direction of the laser, across the irradiated width and into the depth below the irradiated surface. The homogeneity of hardness and hardened depth with different processing parameters was investigated. The hardness profiles were compared with the results obtained with conventional single track hardening.

KW - 4340 steel

KW - fibre laser

KW - hardening

KW - multitrack

KW - oscillation scanning

KW - surface treatment

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DO - 10.1179/1743294412Y.0000000034

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VL - 28

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