Influence of high-power diode laser heat treatment on wear resistance of a mold steel

Changkyoo Park; Jinwoo Kim; Ahjin Sim; In duck Park; Ho Jang; Eun Joon Chun

doi:10.1007/s12206-019-0139-y

Influence of high-power diode laser heat treatment on wear resistance of a mold steel

Changkyoo Park, Jinwoo Kim, Ahjin Sim, In duck Park, Ho Jang, Eun Joon Chun

Department of Materials Science and Engineering

Research output: Contribution to journal › Article

4 Citations (Scopus)

Abstract

The effect of hardness on wear loss and wear behavior during fretting was studied. A high-power diode laser was used to achieve the surface hardening of a mold steel (AISI P20-improved) at temperatures of 1000 and 1200 °C. A hardness increment was detected in laser heat-treated specimens, which may be attributed to phase transformation from ferrite to martensite, influencing wear loss and fretting wear behavior. In the fretting test results, smaller wear scars and less wear loss were observed for laser heat-treated specimens in comparison to those of base metal. Moreover, relatively more stable friction coefficient profiles were obtained for the laser heat-treated specimens due to uniform contact characteristics at two contacting surfaces. The effectiveness of the proposed technique was verified by the morphology of the wear scars of the treated specimens, which had a smooth appearance and minor abrasion grooves.

Original language	English
Pages (from-to)	829-836
Number of pages	8
Journal	Journal of Mechanical Science and Technology
Volume	33
Issue number	2
DOIs	https://doi.org/10.1007/s12206-019-0139-y
Publication status	Published - 2019 Feb 1

Keywords

AISI P20-improved
Fretting
Laser surface treatment
Mold steel
Wear

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering

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10.1007/s12206-019-0139-y

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Park, C., Kim, J., Sim, A., Park, I. D., Jang, H., & Chun, E. J. (2019). Influence of high-power diode laser heat treatment on wear resistance of a mold steel. Journal of Mechanical Science and Technology, 33(2), 829-836. https://doi.org/10.1007/s12206-019-0139-y

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abstract = "The effect of hardness on wear loss and wear behavior during fretting was studied. A high-power diode laser was used to achieve the surface hardening of a mold steel (AISI P20-improved) at temperatures of 1000 and 1200 °C. A hardness increment was detected in laser heat-treated specimens, which may be attributed to phase transformation from ferrite to martensite, influencing wear loss and fretting wear behavior. In the fretting test results, smaller wear scars and less wear loss were observed for laser heat-treated specimens in comparison to those of base metal. Moreover, relatively more stable friction coefficient profiles were obtained for the laser heat-treated specimens due to uniform contact characteristics at two contacting surfaces. The effectiveness of the proposed technique was verified by the morphology of the wear scars of the treated specimens, which had a smooth appearance and minor abrasion grooves.",

keywords = "AISI P20-improved, Fretting, Laser surface treatment, Mold steel, Wear",

author = "Changkyoo Park and Jinwoo Kim and Ahjin Sim and Park, {In duck} and Ho Jang and Chun, {Eun Joon}",

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AU - Chun, Eun Joon

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N2 - The effect of hardness on wear loss and wear behavior during fretting was studied. A high-power diode laser was used to achieve the surface hardening of a mold steel (AISI P20-improved) at temperatures of 1000 and 1200 °C. A hardness increment was detected in laser heat-treated specimens, which may be attributed to phase transformation from ferrite to martensite, influencing wear loss and fretting wear behavior. In the fretting test results, smaller wear scars and less wear loss were observed for laser heat-treated specimens in comparison to those of base metal. Moreover, relatively more stable friction coefficient profiles were obtained for the laser heat-treated specimens due to uniform contact characteristics at two contacting surfaces. The effectiveness of the proposed technique was verified by the morphology of the wear scars of the treated specimens, which had a smooth appearance and minor abrasion grooves.

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