Laser surface pretreatment of 100Cr6 bearing steel – Hardening effects and white etching zones

Buling, Anna; Sändker, Hendrik; Stollenwerk, Jochen; Krupp, Ulrich; Hamann-Steinmeier, Angela

doi:10.1016/j.apsusc.2016.03.088

Cited by 22 publications

(5 citation statements)

References 6 publications

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“…However, the residual heating and subsequent hardening is often considered as a side effect of material removal. Buling et al [31] recently reported surface hardness as high as 900 HV after laser treatment using a pulsed solid-state laser with 1064 nm wavelength, 30 kHz repetition rate and 80 ns pulse duration. While their main objective was to improve the adhesive properties of the bearing steel surface, their result exhibits the potential of using ns laser for hardening.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Comparative study of laser surface hardening of 50CrMo4 steel using continuous-wave laser and pulsed lasers with ms, ns, ps and fs pulse duration

Maharjan

Zhou

Zhou³

et al. 2019

Surface and Coatings Technology

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Section: Accepted Manuscriptmentioning

confidence: 99%

Comparative study of laser surface hardening of 50CrMo4 steel using continuous-wave laser and pulsed lasers with ms, ns, ps and fs pulse duration

Maharjan

Zhou

Zhou³

et al. 2019

Surface and Coatings Technology

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“…With the continuous development of different areas of industrial production, GCr15 bearing steel will be required in increasingly complex working conditions. Bearing steel materials play a vital role in the service life and performance of a product [ 3 , 4 ]. However, material wear caused by friction is closely related to bearing service life and operational accuracy.…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Displacement Amplitude on the Fretting Wear of GCr15 Steel with a TiC Coating

Liu

Zhao

et al. 2022

Materials

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In the present paper, the effect of mechanical ball milling time on the fretting wear of GCr15 steel balls at different displacement amplitudes is investigated. TiC powder coating was fabricated on the surface of GCr15 steel balls using various process times, and the fretting wear tests were conducted on an AISI 52100 steel disk with the applied force of 80 N. Additionally, various displacement amplitudes (10 μm, 20 μm, and 60 μm) were selected. Specimen attributes and wear scars were characterized using an inverted metallographic microscope, a microhardness tester, an X-ray diffractometry analyzer, a white light interferometer, and a scanning electron microscope. The results showed that thick and continuous coatings could be obtained at the milling time of 18 h. The specimens processed for a longer milling time demonstrated better fretting wear resistance, which we attribute to higher microhardness of the surface layer. The coefficient of friction and wear volume of specimens at each different displacement amplitude significantly decreased with increasing milling time. As the displacement amplitude increased, the three fretting states were: partial slip coordinated by elastic deformation; partial slip state coordinated by plastic deformation; and gross slip condition. Our observations indicate that mechanical ball milling could be an efficient approach to improve the fretting wear resistance of GCr15 steel balls.

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“…Furthermore, Idan et al [12] used a 500 W fiber laser to improve the efficiency in hardening of ICD-5 tool steel and showed that laser power density determines the hardening efficiency. Buling et al [13] studied the effect of laser pretreatment on the surface structure and microhardness of 100Cr6 steel. The optimal parameter settings resulted in the formation of very hard white etching zones and changes in morphology.…”

Section: Introductionmentioning

confidence: 99%

Structural Characteristics and Sliding Friction Properties of 40CrNiMo Steel after Broadband Laser Hardening

Yan

et al. 2021

Coatings

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The surface of 40CrNiMo steel, which is commonly used for the sprag clutch wedge, is prone to wear. In this study, hardening of the matrix material was conducted by broadband-laser scanning at various scanning speeds. The hardness distribution and structure evolution were analyzed along the vertical direction. Characteristics of the hardened layer were explored using scanning electron microscopy, transmission electron microscopy, and X-ray diffractometry. The friction coefficient, wear amount, and wear morphology of sliding friction against GCr15 steel were investigated under various conditions. The results show that the depth of the hardened zone decreases with increasing scanning speed. Under the experimental power and defocus, a laser scanning speed between 700–1020 mm/min can meet the general surface requirements of the sprag clutch wedge. After laser hardening, the main components of the hardened layer included lath-shaped and needle-shaped martensite and retained austenite. In terms of friction and wear, when the relative movement speed was within 300–500 mm/min, the relative movement speed decreased and the normal force increased, which led to an increase in the friction coefficient and its fluctuation, as well as an increase in wear volume of the hardened layer. The wear mechanism of the hardened layer included abrasive wear, adhesive wear, and oxidative wear. Excessive normal force resulted in obvious delamination of the sample. Within the scope of the experiment, the best laser hardening results were obtained with a scanning speed of 800 mm/min.

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Laser surface pretreatment of 100Cr6 bearing steel – Hardening effects and white etching zones

Cited by 22 publications

References 6 publications

Comparative study of laser surface hardening of 50CrMo4 steel using continuous-wave laser and pulsed lasers with ms, ns, ps and fs pulse duration

Comparative study of laser surface hardening of 50CrMo4 steel using continuous-wave laser and pulsed lasers with ms, ns, ps and fs pulse duration

The Effect of the Displacement Amplitude on the Fretting Wear of GCr15 Steel with a TiC Coating

Structural Characteristics and Sliding Friction Properties of 40CrNiMo Steel after Broadband Laser Hardening

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