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Journals / Politeknik Dergisi / 2026 / Cilt: 28 Sayı: 4

Manufacturing of Low and High-carbon TRIP Steels by Modeling CCT Diagrams, Design of Microstructure Maps and Tensile Properties

CCT Diyagramları Modellenmesiyle Düşük ve Yüksek Karbonlu TRIP Çeliklerinin Üretimi, Mikroyapı Haritalarının Dizaynı ve Çekme özellikleri

Samet Seras(KARABUK UNIVERSITY)0000-0003-4649-7158
Bilge Demir(KARABUK UNIVERSITY)0000-0002-3617-9749
Pages
1165–1173
Publication Date
2025-07-06
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The results showed that a small amount of martensite transformation occurs during air cooling after the bainitic retention because of the low alloy content.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Although TRIP steels are the first-generation steel for the automotive industry, their high strength, formability, and strength after forming are versatile and widely used automotive steel.
📊
Key Findings & Data:This study attempts to evaluate the automotive TRIP steels' manufacturing chains, thermal process, microstructure, and tensile properties via experimental modeling (CCT diagrams-microstructure maps) on two steel groups with low cost.
💡
Conclusion & Impact:The results showed that a small amount of martensite transformation occurs during air cooling after the bainitic retention because of the low alloy content.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:TRIP çeliği · Beynitik izotermal tutma · Mikroyapı haritaları

Abstract

Although TRIP steels are the first-generation steel for the automotive industry, their high strength, formability, and strength after forming are versatile and widely used automotive steel. This study attempts to evaluate the automotive TRIP steels' manufacturing chains, thermal process, microstructure, and tensile properties via experimental modeling (CCT diagrams-microstructure maps) on two steel groups with low cost. The TRIP Steels manufacturing chains are chemical design, investment casting, hot rolling, and TRIP thermal processes modeling and applications. Experimental techniques performed on samples, meaning characterizations, are image analysis, XRD, hardness, and tensile tests. The results showed that a small amount of martensite transformation occurs during air cooling after the bainitic retention because of the low alloy content. As a result, modeling and microstructure maps have been successfully combined and studied in detail to design and manufacture the TRIP sheet steel.

Özet

TRIP çelikleri otomotiv endüstrisi için birinci nesil çelik olmasına rağmen yüksek mukavemeti, şekillendirilebilirliği ve şekillendirme sonrası mukavemeti çok yönlü ve yaygın olarak kullanılan otomotiv çeliğidir. Bu çalışma, otomotiv TRIP çeliklerinin üretim zincirlerini, ısıl süreçlerini, mikro yapılarını ve çekme özelliklerini, düşük maliyetli iki çelik grubu üzerinde deneysel modelleme (CCT diyagramları-mikro yapı haritaları) yoluyla değerlendirmeyi amaçlamaktadır. TRIP çeliklerinin üretim zincirleri kimyasal tasarım, hassas döküm, sıcak haddeleme ve TRIP termal proses modelleme ve uygulamalarıdır. Numuneler üzerinde gerçekleştirilen deneysel teknikler, yani karakterizasyonlar, görüntü analizi, XRD, sertlik ve çekme testleridir. Sonuçlar, beynitik tutmanın ardından havayla soğutma sırasında düşük alaşım içeriği nedeniyle az miktarda martenzit dönüşümünün meydana geldiğini gösterdi. Sonuç olarak, TRIP çelik sacın tasarımını ve üretimini gerçekleştirmek için modelleme ve mikro yapı haritaları başarıyla birleştirildi ve ayrıntılı olarak incelendi.

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Cite This Article

Seras, S., Demir, B. (2025). Manufacturing of Low and High-carbon TRIP Steels by Modeling CCT Diagrams, Design of Microstructure Maps and Tensile Properties. Politeknik Dergisi, Cilt: 28 Sayı: 4, 1165–1173. https://doi.org/10.2339/politeknik.1382745

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