Influence of laser spot scanning speed on micro-polishing of metallic surface using UV nanosecond pulse laser

Jang, Pong-Ryol; Kim, Chun-Gun; Han, Gwang-Pok; Ko, Myong-Chol; Kim, Un-Chol; Kim, Hye‐Sung

doi:10.1007/s00170-019-03559-8

Cited by 16 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, this study necessitates the usage of a pulse laser for precise machining purposes. [30][31][32] The experimental machining system consists of an all-solid-state UV nanosecond laser (parameters are shown in Table II), a beam expander, a mirror, a scanning galvanometer, Ftheta lens, a computer, and a water-cooling device, as shown in Fig. 2.…”

Section: Experimental Designmentioning

confidence: 99%

Experimental Study on the Influence of Ultraviolet Laser Parameters on the Micro Machining Quality of Silicon Carbide Ceramic

Zhao,

Ruan,

Chen

et al. 2023

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

Silicon carbide(SiC) ceramics have great application value in microelectronics and semiconductors due to their small dielectric constant, high thermal conductivity, and small thermal expansion coefficient. However, due to its high hardness and brittleness, defects such as stress concentration, microcracks, and an excessively large heat-affected zone are prone to occur in traditional machining methods. In this paper, the ultra-thin SiC surface was micro-grooved by ultraviolet(UV) laser. The effects and rules of various machining parameters (scanning speed, repetition frequency, pulse width, defocus amount) in UV laser micro-grooves machining on the surface quality, machining depth, and cross-sectional morphology of SiC were studied. The experimental results showed that the surface roughness of SiC micro-grooves decrease with the increase of scanning speed; The relatively small surface roughness (R a 0.72 μm) could be obtained at a scanning speed of 500 mm s−1 and a repetition frequency of 40 kHz; Under low pulse width of 5 ns, high repetition frequency of 50 kHz, and high scanning speed of 500 mm s−1, micro-grooves with a relative error of 2.3% in removal depth could be obtained; The taper of the micro-groove section first decreases and then increases with the defocus from negative to positive, and reached the minimum value of 5° when the defocus positive 0.6 mm.

show abstract

Section: Experimental Designmentioning

confidence: 99%

Experimental Study on the Influence of Ultraviolet Laser Parameters on the Micro Machining Quality of Silicon Carbide Ceramic

Zhao,

Ruan,

Chen

et al. 2023

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…By comparing the material surface before and after polishing, it was found that the depth and width of molten pool increased with the increase of laser radiation duration, and the surface morphology was smoother after polishing. Pong-Ryol Jang et al [17] have studied the polishing effect of ultraviolet nanosecond pulse laser on metal surface. It is found that there is an optimal scanning speed for laser micro polishing, which can be used to reduce the surface roughness of Ti and Ni metal surfaces by up to 56 % and 52 %, respectively.…”

Section: Introductionmentioning

confidence: 99%

Surface features of multi-beam coupling nanosecond laser processing of nickel-based superalloys

Chen²,

Chen³

et al. 2022

Seventeenth National Conference on Laser Technology and Optoelectronics

View full text Add to dashboard Cite

Nickel-based superalloy (DZ411) is widely used in the manufacture of high-temperature components in the aerospace field due to its excellent physical and mechanical properties, such as high-temperature resistance, oxidation resistance, and corrosion resistance. Laser polishing can improve the surface quality and service performance of nickel-based superalloy materials. In this paper, a new type of multi-beam coupling laser based conventional laser is used to process the nickelbased superalloy materials. The processing experiments of nickel-based superalloy were carried out by changing laser power, scanning speed, and scanning pitch. Then the polished surfaces were observed and detected by laser confocal microscope. The results show that the surface of nickel-based superalloy materials has certain regularity with the variations of process parameters. Under these experimental parameters, surface roughness (Ra) decreases first and then increases with the increase of laser power, scanning speed, and scanning pitch. The minimum Ra of the polished surface is 1.06 μm under the process parameter combinations of laser power of 1W, scanning speed of 400 mm/s, and scanning pitch of 20 μm. The maximum valley depth (Rv) and the maximum height (Rz) of profile first decrease and then increase with the increase of laser power or scanning speed. However, Rv and Rz had a little rate of fluctuation with the increase of scanning pitch. The laser polishing process involves the dynamic time-varying absorption mechanism of the coupled laser energy by polymorphic materials, and it is accompanied by complex physical processes such as material melting, gasification, and re-condensation. When Ra is relatively low, a clear corrugated structure appears on the machined surface. This research work can provide process data support for optimizing the polishing process parameters of nickel-based superalloys and expand the laser processing types.

show abstract

“…Moreover, laser polishing has the advantage of polishing for high hardness materials [9]- [11]. It is regarded as a new surface final processing technology, which is promising to replace the timeconsuming and error-prone manual polishing [12], [13].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study of Ultrasonic Vibration-Assisted Laser Polishing 304 Stainless Steel

Kang

Zou

et al. 2020

IEEE Access

View full text Add to dashboard Cite

With the increasing requirements for the surface quality of the workpiece, many kinds of hybrid manufacturing have developed recently. Ultrasonic vibration-assisted laser polishing (UVLP) is a new hybrid manufacturing method. Different from the traditional method of applying ultrasonic vibration on the workpiece, this paper applies ultrasonic vibration on the lens. Besides, the thermal mechanisms of the 304 stainless steel polished by traditional laser polishing (TLP) and UVLP were analyzed to reveal the influence of ultrasonic vibration on the polishing effect. The ultrasonic vibration lens transforms the laser polishing into an intermittent polishing process, which affects the laser energy density and the quality of the polished surface. This research was focused on the experimental analysis of the surface morphology and surface roughness of the 304 stainless steel that was processed by UVLP, and compared with TLP. And the effects of laser power, scanning speed, focus offset, and amplitude on the quality of the polished surface were obtained. The preferred process parameters of UVLP 304 stainless steel were obtained by the range analysis and variance analysis of the orthogonal experiment. Experimental results have shown that UVLP can reduce the surface roughness of 304 stainless steel from 2.777 μm to 0.512 μm at most. Thermal mechanism analysis results were verified by experimental results. Choosing appropriate processing parameters can effectively improve the quality of the polished surface, making the processing effect of UVLP significantly better than TLP.

show abstract

Influence of laser spot scanning speed on micro-polishing of metallic surface using UV nanosecond pulse laser

Cited by 16 publications

References 12 publications

Experimental Study on the Influence of Ultraviolet Laser Parameters on the Micro Machining Quality of Silicon Carbide Ceramic

Experimental Study on the Influence of Ultraviolet Laser Parameters on the Micro Machining Quality of Silicon Carbide Ceramic

Surface features of multi-beam coupling nanosecond laser processing of nickel-based superalloys

Theoretical and Experimental Study of Ultrasonic Vibration-Assisted Laser Polishing 304 Stainless Steel

Contact Info

Product

Resources

About