Effect of Temper Rolling Reduction Ratio on Microhardness and Microstructure of DC04 Grade Sheet Material

Özakın, Batuhan; Kurgan, Naci

doi:10.17798/bitlisfen.956944

Cited by 3 publications

(1 citation statement)

References 19 publications

(22 reference statements)

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“…Additionally, lubrication conditions are important parameters that affect the surface quality of the produced parts [3]. Surface quality plays a significant role in the adhesion of paint or coatings to the material surface [4,5]. Furthermore, the roughness of the material surface affects its resistance to corrosion depending on the working conditions [6].…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

Investigation of the Performance of Vegetable Lubricants in Cold Pressing

2023

International Conference on Innovative Academic Studies

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Determining the optimal reduction ratio in temper rolling in terms of residual stress distribution across thickness

ÇOLAK

2023

Gümüşhane Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Materials with compressive stresses on the surface withstand fatigue failures, cracking, galling, and corrosion. This compressive stress at the surface can be created by temper rolling. The rolling process must be conducted with an appropriate reduction to obtain the desired benefit from temper rolling. A 1% thickness reduction is usually applied to endow flatness and surface texture to the strip, and this reduction is sufficient to eliminate the discontinuous yielding phenomenon. In this study, 2.5-mm-thick low-carbon steel sheet (DC01 grade) samples were annealed at approximately 600°C for 5 minutes, temper-rolled at room temperature at various reduction ratios subsequently, and the residual stresses formed along the thickness by rolling were investigated. This study has revealed that a 1% reduction ratio is insufficient for developing compressive stresses on the surface, but this can only be achieved with a 1.5% reduction ratio. When the reduction ratio was increased to 1.8%, tensile stresses began to occur inside, along with compressive stresses on the surface. It was observed that at a reduction ratio of 2%, the situation was reversed again; tensile stresses began to regenerate at the surface, and this became more pronounced up to a 10% reduction ratio.

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Sac Malzemelerin Boyanabilme Kabiliyetlerine Temper Haddeleme Ezme Miktarının Etkisi

Özakın

YILMAZ²

2023

Karadeniz Fen Bilimleri Dergisi

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Boyalı çelik sac malzemelerin yüzeyleri otomotiv, beyaz eşya vb. sektörlerde ürünün son kalitesini ortaya koyduğundan tüketicinin dikkate aldığı önemli unsurlardan biridir. Bu sektörlerde kullanılan çelik sac malzemeler genellikle soğuk haddeleme üretim sürecinin son basamağında boyanabilme ve şekillendirme açısından pürüzlü olarak üretilir. Yüzeyde meydana gelen pürüzlülük profili sac malzemelerin boyanabilme kabiliyetini etkilemektedir. Aynı zamanda sac malzemelerin farklı pürüzlülüklerde temin edilebilmesinden dolayı yapışma mukavemetlerinin ve boyanabilme kabiliyetlerinin farklı olduğu ortadadır. Ayrıca yine haddeleme parametreleri ve yüzey pürüzlülük parametreleri boya ve kaplamaların malzeme yüzeyine yapışma mukavemetini ve boyanabilme kabiliyetini etkilemektedir. Bu çalışmada HC420LA sac malzemelerin boyanabilme kabiliyetlerine temper haddeleme ezme miktarının etkisi araştırılmıştır. İlk olarak sac malzeme numuneleri farklı ezme miktarlarıyla temper haddeleme işlemine tabi tutulmuştur. Temper haddelenmiş HC420LA sac malzeme numunelerinin yüzeylerinin pürüzlülük parametreleri belirlenmiştir. Farklı ezme miktarları ile haddelenmiş ve farklı pürüzlülüklere sahip çelik sac malzemelerin poliüretan akrilik esaslı boya ile kaplanmıştır. Son olarak boyanmış yüzeylerin yapışma mukavemetleri, dolayısıyla boyanabilme kabiliyetleri çapraz kesim (cross-cut) testinden elde edilmiştir. Temper haddeleme ezme miktarının arttıkça yüzeyin pürüzlülük profilinde değişimler meydana gelmiştir. Temper haddeleme ezme miktarı arttıkça (%0-1 aralığında) boyanın yapışma mukavemeti azalmış ve %1 ezme miktarının üzerindeki artışlarda boyanın yapışma mukavemetinin arttığı tespit edilmiştir. Tepelerin yüksekliklerinin (Rpk) ve vadilerin derinliklerinin (Rvk) boyanın yapışma mukavemetinde oldukça etkili olduğu sonucuna varılmıştır.

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Effect of Temper Rolling Reduction Ratio on Microhardness and Microstructure of DC04 Grade Sheet Material

Cited by 3 publications

References 19 publications

Investigation of the Performance of Vegetable Lubricants in Cold Pressing

Investigation of the Performance of Vegetable Lubricants in Cold Pressing

Determining the optimal reduction ratio in temper rolling in terms of residual stress distribution across thickness

Sac Malzemelerin Boyanabilme Kabiliyetlerine Temper Haddeleme Ezme Miktarının Etkisi

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