Effect of material thickness and reduction ratio on roughness transfer in skin-pass rolling to DC04 grade sheet materials

Özakın, Batuhan; Çolak, Bilal; Kurgan, Naci

doi:10.1108/ilt-10-2020-0377

Cited by 7 publications

(5 citation statements)

References 23 publications

(32 reference statements)

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“…The roughness measurements were repeated at three different points on the surfaces, and the average of these measurements was taken to determine the arithmetic mean roughness (Ra) parameter. Figure 2 illustrates a schematic representation of the roughness measurements [14].…”

Section: B Methodsmentioning

confidence: 99%

“…Fig. 2 Schematic picture of roughness measurements [14] The amount of deformation (r) occurring in the sheet material was calculated by measuring the thicknesses of the material before and after pressing using a precision micrometer, with the help of Equation 1 [15]. In Equation 1, r0 represents the initial thickness of the sheet material, and r1 represents the final thickness of the sheet material after pressing.…”

Section: B Methodsmentioning

confidence: 99%

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Investigation of the Performance of Vegetable Lubricants in Cold Pressing

2023

International Conference on Innovative Academic Studies

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Cold pressing is a plastic shaping method used for materials to gain superior mechanical properties. In this shaping method, surface quality is of utmost importance. Lubricant surface quality is one of the highly effective parameters in achieving the desired surface quality in the pressing process. Recently, considering sustainability and human health, vegetable-based lubricants have come to the forefront and are open to further development. In this study, the performances of vegetable-based lubricants in cold pressing were evaluated by determining and assessing the roughness transfer ratios from the press tool to the sheet material. Vegetable-based lubricants such as sunflower oil, soybean oil, canola oil, and palm oil were compared with motor oil for the purpose of comparison and were evaluated under dry conditions. The conditions where motor oil was used as the lubricant showed the lowest roughness transfer ratio of 73%, indicating the best performance. Palm oil followed with a roughness transfer ratio of 76%, sunflower oil with 78%, soybean oil with 79%, and finally, canola oil with 82%. Among the four different vegetablebased lubricants used in the study, palm oil exhibited the highest performance, while canola oil had the lowest performance. Although the lubrication performance of vegetable-based lubricants is weaker compared to synthetic-based lubricants, it was concluded that they have potential for improvement and can be used as lubricants by addressing their weaknesses in the manufacturing processes.

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Section: B Methodsmentioning

confidence: 99%

Section: B Methodsmentioning

confidence: 99%

Investigation of the Performance of Vegetable Lubricants in Cold Pressing

2023

International Conference on Innovative Academic Studies

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“…All samples were then subjected to a single pass cold rolling process. The experimental rolling mill has a single-stand two-roll arrangement and the roll diameters are 75 mm [21]. After this process, the test specimens were annealed for 5 min to 10 min at a temperature range of 700 °C to 800 °C in order to reduce the strain hardening.…”

Section: Rolling Experimentsmentioning

confidence: 99%

Optimization of pickling and annealing parameters in cold rolling using the Taguchi method

Özakın

2023

Materialwissenschaft Werkst

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In this study, the optimum values of pickling and annealing parameters in cold rolling were obtained by using the Taguchi method. The materials taken from the hot rolling mill were subjected to pickling with different pickling times (3 min, 4 min, 5 min) parameters and then cold rolled. After this process, annealing was carried out with different annealing temperatures (700 °C, 750 °C, 800 °C), annealing times (5 min, 7.5 min, 10 min) in order to eliminate the cold working hardness. After these processes, sheet materials were subjected to skin‐pass rolling, which is the last step of the rolling process. Optimum conditions are minimum rolling force measured from the load cell positioned on the work rolls. In this direction, S/N ratios with objective function “smaller is better” and were calculated and the optimum levels of the parameters were determined as 3 min pickling time, 750 °C annealing temperature and 10 min annealing time. In line with the findings obtained from the analysis of variance, it was determined that the most important parameter was the annealing time with a rate of 48.99 %. Confirmation experiments were carried out and it was concluded that the optimization was valid.

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“…One of the main parameters of skin-pass rolling is the reduction ratio. Due to the change in the reduction ratio, surfaces with different roughness profiles can be obtained [12]. As the reduction ratio increases, the roughness value of the surface always increases [13].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the effect of skin-pass rolling reduction ratio on corrosion behaviors of AISI 304 stainless steel sheet materials

Özakın

2023

Surf. Topogr.: Metrol. Prop.

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This study was carried out in order to reveal the effect of reduction ratio, one of the parameters of the skin-pass rolling manufacturing process of sheet metal materials, on the corrosion behaviours. In this experimental study, AISI 304 stainless steel sheet material samples were subjected to skin-pass rolling process with different reduction ratios (0.5%, 2.0%, 4.2% and 7.2%). The corrosion behaviours of skin-pass rolled AISI 304 stainless steel sheet material samples in 3.5% chloride solution was determined by potentiodynamic polarization curves. The changes in the surfaces were evaluated together with the surface roughness measurements and microstructure images. It was concluded that the increase in skin-pass rolling reduction ratio increased the corrosion resistance. The arithmetic mean roughness (Ra) did not give sufficient results to prove the finding that corrosion resistance improves as the reduction increases. The change of valleys and peaks in the roughness profile of the skin-pass rolled samples before and after corrosion was found to be evidence that the increase in reduction ratio improves corrosion resistance. As the skin-pass rolling reduction ratio increased was determined in the microstructural images that the amount of oxide layer increased and this situation was clarified from X-ray spectroscopy (EDS) findings. Electrochemical measurements, surface roughness profiles, microstructure images and EDS analyses were obtained with results that support each other.

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Effect of material thickness and reduction ratio on roughness transfer in skin-pass rolling to DC04 grade sheet materials

Cited by 7 publications

References 23 publications

Investigation of the Performance of Vegetable Lubricants in Cold Pressing

Investigation of the Performance of Vegetable Lubricants in Cold Pressing

Optimization of pickling and annealing parameters in cold rolling using the Taguchi method

Experimental investigation of the effect of skin-pass rolling reduction ratio on corrosion behaviors of AISI 304 stainless steel sheet materials

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