Effect of grinding parameters on surface quality, microstructure and rolling contact fatigue behaviors of gear steel for vacuum pump

Kang, Bo Ram; Ma, Hongru; Jun, Li; Xu, Buqin

doi:10.1016/j.vacuum.2020.109637

Cited by 22 publications

(13 citation statements)

References 31 publications

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“…According to the detailed information concerning main effects plots of surface roughness related to different grinding parameters, it can be known that surface roughness increased when feed speed raised from 0.19 m/s to 0.26 m/s and decreased at higher grinding depth and grinding speed, Figure 16. Surface roughness was positively related to feed speed [3]. With higher level of feed speed, more materials were removed by the grinding wheel per unit time, contributing to deeper scratches.…”

Section: Resultsmentioning

confidence: 96%

“…At specific grinding depth and feed speed, the increase of grinding speed from 26 m/s to 34 m/s led to the decrease of roughness on vertical direction, the mechanism could be concluded as two aspects. On the one hand, with increased grinding speed, the number of effective sharpening edges passing through the grinding zone per unit time increased, while the height of the scratches was decreased, resulting in a decrease in the thickness of a single abrasive grain [3]. It contributed to a decrease of surface roughness.…”

Section: Resultsmentioning

confidence: 99%

“…In previous researches, dislocation structures were formed around the boundary between martensite and ferrite after grinding process. With relatively large grinding depth, the microstructure at top surface generated twinning martensite because of severe plastic deformation, and the compressive residual stress was sensitive to grinding parameters [3]. Plastic deformation and grain refinement can also be caused by grinding process, and affect surface residual stress [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Residual stress evolution and surface morphology in grinding of hardened steel following carburizing and quenching processes

Yang¹,

Chen²,

Wu³

et al. 2022

Materialwissenschaft Werkst

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In this paper, the residual stress evolution and surface morphology of quenched 20Cr2Ni4A steel after surface grinding with alumina grinding wheel was investigated. The initial compressive residual stress in the surface layer evolved into tensile stress after grinding. Since thermal stress was the dominated factor, the effect of grinding speed and grinding depth showed significant effects on the level of residual stress. The tensile stress on the ground surface increased by more than 50 % when grinding speed increased from 26 m/s to 34 m/s at the feed speed of 0.19 m/s to 0.26 m/s. The increase of grinding depth from 0.02 mm to 0.03 mm resulted in the increase rate of tensile stress varying between 54 % and 85 % at specific feed speed and grinding speed. Due to the extrusion and cutting of abrasive particles, plastic deformation and grooves were found on the machined surface. The influence of grinding heat and grinding force caused a plastic deformation layer and grinding burn layer within 20 μm.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Residual stress evolution and surface morphology in grinding of hardened steel following carburizing and quenching processes

Yang¹,

Chen²,

Wu³

et al. 2022

Materialwissenschaft Werkst

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show abstract

“…When the grinding depth increased to 0.03 mm, the surface roughness was deteriorated and increased to ~0.60 μm. Obviously, the increase in grinding depth produced a higher level of grinding force and grinding temperature and the material was squeezed by abrasive particles and flowed plastically to both sides, resulting in the increase in surface roughness [ 34 ]. At a grinding depth of 0.02 mm when the feed speed increased from 0.26 m/s to 0.35 m/s, and at the grinding depth of 0.03 mm when the feed speed increased from 0.19 m/s to 0.26 m/s, the decrease in Sa was less than 0.034 μm.…”

Section: Resultsmentioning

confidence: 99%

Grinding Temperature and Surface Integrity of Quenched Automotive Transmission Gear during the Form Grinding Process

Jiang

Liu²,

Yan

et al. 2022

Materials

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Grinding burn is an undesired defect in gear machining, and a white layer is an indication of severe burn that is detrimental to gear surface performance. In this work, the influence of grinding parameters on the thickness of the white layer during form grinding of quenched transmission gear was investigated, and the microstructure evolution and mechanism of severe burn formation were analyzed. The grinding temperature increased with the grinding depth and grinding speed, with the highest level of ~290 °C. The thickness of the white layer exceeded 100 μm when the grinding depth was 0.03 mm, and the top layer was a plastic deformation layer followed by a fine-grained martensite layer. Coarse-grained acicular martensite was found at the interface between the white layer and softened dark layer. The mechanical effect and thermal softening mainly contributed to the formation of white layer stratification. The ground surface topography showed several scratches and typical grooves; when grinding depth increased to 0.03 mm, the grinding surface roughness Sa was relatively high and reached up to ~0.60 μm, mainly owing to severe plastic deformation under grinding wheel extrusion and the thermal effect.

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“…When using mechanical processing, the correct choice of abrasive grain size is crucial. Too small a grit size can cause the contaminants to be smeared across the surface, whereas coarse grit sizes create deep scratches and craters on the surface, which can cause changes in the properties of the surface layer [ 43 , 44 ]. The machining process should be followed by a final degreasing process to remove dust, dirt, grease, and other contaminants.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Sandblasting Process Parameters of Aerospace Aluminium Alloy Sheets on Adhesive Joints Strength

2021

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In this study, the influence of sandblasting process parameters as a surface preparation method on the strength of single-lap adhesive joints of EN AW 2024 T3 aerospace aluminium alloy sheets was determined. Eleven sets of sandblasting parameters were used, which were determined according to a determined experimental plan. The variable factors in the sandblasting process were pressure, nozzle distance, and workpiece displacement speed. The sand jet incidence angle was constant. Garnet 80 E+ was the abrasive material that was used. The joints were made using an epoxy adhesive composition of Epidian 5 epoxy resin and a PAC curing agent. The influence of the surface preparation method on the surface roughness and contact angle to determine the surface free energy was evaluated. The shear strength of the adhesive joints was also determined, which finally allowed the evaluation of the applied surface treatment variants. The obtained results were subjected to statistical analysis, which indicated that the highest shear strength of the adhesive joints was obtained for samples whose surfaces were treated by sandblasting at parameter configurations in which the pressure was 5–6 × 105 Pa; the distance between the nozzle and the sandblasted surface should not be greater than 97 mm, and the speed at which the workpiece moves in relation to the nozzle should not be greater than 75 mm/min.

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Effect of grinding parameters on surface quality, microstructure and rolling contact fatigue behaviors of gear steel for vacuum pump

Cited by 22 publications

References 31 publications

Residual stress evolution and surface morphology in grinding of hardened steel following carburizing and quenching processes

Residual stress evolution and surface morphology in grinding of hardened steel following carburizing and quenching processes

Grinding Temperature and Surface Integrity of Quenched Automotive Transmission Gear during the Form Grinding Process

The Influence of Sandblasting Process Parameters of Aerospace Aluminium Alloy Sheets on Adhesive Joints Strength

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