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Influence of Al, Cu and Ni Additions on Mechanical Properties of Hot-Rolled Fe-9Mn-0.2C Medium-Manganese Steels

Young-Chul Yoon Sang-Gyu Kim Sang-Hyeok Lee Byoungchul Hwang

Archives of Metallurgy and Materials | 2021 | vol. 66 | No 4 | 1007-1011 | DOI: 10.24425/amm.2021.136415

Keywords medium-manganese steel hot-rolled microstructure strength impact toughness

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Abstract

The microstructure and mechanical properties of hot-rolled Fe-9Mn-0.2C medium-manganese steels with different Al, Cu, and Ni contents were investigated in this study. Based on the SEM, XRD, and EBSD analysis results, the microstructure was composed of martensite, band-type delta ferrite, and retained austenite phases depending on the Al, Cu, and Ni additions. The tensile and Charpy impact test results showed that the sole addition of Al reduced significantly impact toughness by the presence of delta-ferrite and the decrease of austenite stability although it increased yield strength. However, the combined addition of Al and Cu or Ni provided the best combination of high yield strength and good impact toughness because of solid solution strengthening and increased austenite stability.

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Bibliography

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Authors and Affiliations

Young-Chul Yoon

1

e-mail:

ORCID:

Sang-Gyu Kim

1

e-mail:

ORCID:

Sang-Hyeok Lee

1

e-mail:

ORCID:

Byoungchul Hwang

1

e-mail:

ORCID:

Seoul National University of Science and Technology, Department of Materials Science and Engineering, 232, Gongneung-Ro., Nowon-gu, Seoul 01811, Korea

Characteristic of DP600 Steel Produced in Hot Rolling Process

Tomasz Kaźmierski Janusz Krawczyk Łukasz Frocisz

Archives of Metallurgy and Materials | 2023 | vol. 68 | No 4 | 1641-1648 | DOI: 10.24425/amm.2023.146234

Keywords Dual phase steels hot rolling process mechanical properties automotive industry

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Abstract

DP600 steels are characterized by a dual phase ferritic-martensitic microstructure, to which they owe their exceptionally favourable combination of high strength and good ductility. One of the production methods for this grade of steel is the hot rolling process. Despite the fact that these steels have been produced on an industrial scale for almost 40 years, they are still being studied intensively, with new research on the formation of their microstructure and properties published every year. This article focuses on the characteristics of DP600 steel produced on a hot rolling mill for applications in automotive industry. The article presents the results of mechanical properties tests and microstructure analysis of DP600 steel obtained in an industrial hot rolling process. The general characteristic of DP600 steel presented in this article, is supplemented with statistical analysis of correlations between chemical composition, selected process parameters and mechanical properties of hot rolled DP600 steel.

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Authors and Affiliations

Tomasz Kaźmierski

1

e-mail:

ORCID:

Janusz Krawczyk

2

e-mail:

ORCID:

Łukasz Frocisz

2

e-mail:

ORCID:

ArcelorMitt al Poland S.A. Unit in Krakow, Tadeusza Sendzimira 1 Street, 31-752 Krakow, Poland; AGH Doctoral School al. Mickiewicza 30, 30-059 Krakow, Poland
AGH University of Krakow, Faculty of Metals Engineering and Computer Science, Al. Mickiewicza 30, 30-059 Krakow, Poland

Microstructure and Mechanical Properties of Hot-deformed AlMg4 Alloys with the Variations of Mn, Fe, and Si contents

Da B. Lee Bong H. Kim Kweon H. Choi Seung Y. Yang Nam S. Kim Seong H. Ha Young O. Yoon Hyun K. Lim Shae Kim Soong K. Hyun

Archives of Metallurgy and Materials | 2020 | vol. 65 | No 4 | 1255-1259 | DOI: 10.24425/amm.2020.133679

Keywords Al-Mg alloy intermetallic compounds homogenization hot-rolling microstructure

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Abstract

This paper aims to investigate the microstructural evolution and mechanical properties of hot-deformed AlMg4 alloys with Mn, Fe, and Si as the main impurities. For this purpose, solidification behavior and microstructural evolution during hot-rolling and heat-treatment processes are investigated by using theoretical calculations and experimental characterization. The crystallization and morphological transformation of intermetallic Al3Fe, Al6Mn, and Mg2Si phases are revealed and discussed in terms of the variation in chemical composition. Following a homogenization heat-treatment, the effect of heat treatment on the intermetallic compounds is also investigated after hot-rolling. It was revealed that the Mg2Si phase can be broken into small particles and spherodized more easily than the Al3Fe intermetallic phase during the hot-rolling process. For the Mn containing alloys, both yield and ultimate tensile strength of the hot-rolled alloys increased from 270 to 296 MPa while elongation decreased from 17 to 13%, which can be attributed to Mn-containing intermetallic as well as dispersoid.

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Authors and Affiliations

Da B. Lee

Bong H. Kim

e-mail:

ORCID:

Kweon H. Choi

e-mail:

ORCID:

Seung Y. Yang

e-mail:

ORCID:

Nam S. Kim

e-mail:

ORCID:

Seong H. Ha

Young O. Yoon

Hyun K. Lim

e-mail:

ORCID:

Shae Kim

Soong K. Hyun

Effect of Final Rolling Temperature on Microstructure, Properties and Texture of Hot Rolled Strip by New Endless Rolled Line

Chaoyang Li Peng Tian Zhipeng Zhao Xiaohui Liang Shuhuan Wang Yonglin Kang Xian Luo

Archives of Metallurgy and Materials | 2023 | vol. 68 | No 4 | 1411-1420 | DOI: 10.24425/amm.2023.146207

Keywords final rolling temperature microstructure properties texture hot rolled plate

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Abstract

Donghua steel continuous casting-rolling (DSCCR) line is a new endless rolling line in which tunnel heating furnace is added before and after roughing mills to change the temperature field of slab and intermediate slab, but this change will affect the microstructure and properties of hot rolled plate. Therefore, the microstructure evolution, mechanical properties, texture analysis, hole expanding and earing test of 2.0 mm thick hot rolled plate produced by DSCCR line at different final rolling temperature of 860°C, 840°C and 820°C are studied. The results show that with the decrease of final rolling temperature, there is an obvious layered microstructure distribution along the thickness direction, and the surface coarse grain area gradually expands inward, at the same time the morphology of cementite also changed from large multi domain lamellar pearlite and long rod cementite to small single domain lamellar pearlite and short rod cementite. The engineering stress-strain curves have discontinuous yield with the yield elongation of 4-5% and the elongations are more than 35%. EBSD analysis shows that small angle grain boundaries and deformed grains increase significantly with the decrease of final rolling temperature, and are mainly distributed in fine grain area. Hole expanding and earing tests show that with the decrease of final rolling temperature, the earing performance decreased but the limiting hole expanding ratio is similar.

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Authors and Affiliations

Chaoyang Li

1

Peng Tian

2

e-mail:

ORCID:

Zhipeng Zhao

2

Xiaohui Liang

2

Shuhuan Wang

2

Yonglin Kang

2

Xian Luo

2

North China University of Science and Technology, School of Metallurgy and Energy, Tangshan, 063210, China
University of Science and Technology Beijing, School of Materials Science and Engineering, Beijing, 100083, China

Production Line Modelling in Accordance with the Industry 4.0 Concept as an Element of Process Management in the Iron and Steel Industry

Mariusz Niekurzak Ewa Kubińska-Jabcoń

Management and Production Engineering Review | 2021 | vol. 12 | No 4 | 3-12 | DOI: 10.24425/mper.2021.139990

Keywords Hot rolling mill Logistic model of a mill Steel strip Stock management

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Abstract

Simulations are becoming one of the most important techniques supporting production preparation, even in those industrial sectors with atypical technological processes, such as in metallurgy, where there is a multiphase material flow. This is due to the fact that in the conditions of a market economy, enterprises have to solve more and more complex problems in a shorter time. On the basis of the existing production process and the knowledge of the flow characteristics in a given process, a model is built, which, when subjected to simulation tests, provides experimental results in the scope of the defined problem. The use of computer techniques also creates new possibilities for the rational use of the reserves inherent in each technological process. Taking into account the existing demand and the state of modern technology, the computer model can be a source of information for further analysis and decision-making processes supporting company management. At work a model of the logistic system was made on the example of a hot-rolled steel strip mill, on which simulation experiments were carried out to improve the effectiveness and efficiency of the analysis production line. The presented article aims to disseminate the idea of ??Industry 4.0 in Polish companies from the manufacturing industry sector, taking into account simulation techniques.

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Authors and Affiliations

Mariusz Niekurzak

1

Ewa Kubińska-Jabcoń

1

AGH University of Science and Technology, Faculty of Management, Poland

Effects of Hot rolling Reduction on Microstructural Evolution and Mechanical Properties of 1.25Cr-1Mo-0.5V-0.3C Steel for High-Speed Rail Brake Discs

Hyo-Seong Kim Moonseok Kang Minha Park Byung Jun Kim Yong-Shin Kim Tae Young Lee Byoungkoo Kim Yong-Sik Ahn

Archives of Metallurgy and Materials | 2024 | vol. 69 | No 1 | 113-116 | DOI: 10.24425/amm.2024.147797

Keywords Hot rolling Rolling reduction Toughness Medium carbon steel EBSD

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Abstract

In this study, the effect of rolling of 1.25Cr-1Mo-0.5V-0.3C American Iron and Steel Institute 4340 modified steel for highspeed railway brake discs on the microstructure and mechanical properties was investigated. The materials were hot-rolled at 0%, 51%, and 66% reduction ratios, and then analyzed by optical microscopy, scanning electron microscopy, and electron backscattering diffraction (EBSD). needle-shaped ferrite block morphology in bainite varied with the rolling ratio. EBSD analysis reveals dynamic recovery and dynamic recrystallization, affected ferrite block boundaries and dislocation densities during rolling. Mechanical tests showed that hardness, toughness and elongation increase at higher rolling reduction ratio, while strength remained relatively constant. In particular, the impact toughness increased almost twice from the level of 70 J in S1 (0% reduction) to the level of 130 J in S3 (66% reduction). These results showed that the hot rolling can significantly improve the strength and toughness combination of cast brake discs material.

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Authors and Affiliations

Hyo-Seong Kim

1 2 4

e-mail:

ORCID:

Moonseok Kang

1

e-mail:

ORCID:

Minha Park

1

e-mail:

ORCID:

Byung Jun Kim

1

e-mail:

ORCID:

Yong-Shin Kim

3

Tae Young Lee

3

Byoungkoo Kim

1

e-mail:

ORCID:

Yong-Sik Ahn

2

e-mail:

ORCID:

Korea Institute of Industrial Technology, 46938, Busan, Republic of Korea
Pukyong National University, Department of Materials Science and Engineering, 48547, Busan, Republic of Korea
KATEM, 51395, Changwon, Republic of Korea
HD Korea Shipbuilding & Offshore Engineering, 44032, Ulsan, Republic of Korea

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Influence of Al, Cu and Ni Additions on Mechanical Properties of Hot-Rolled Fe-9Mn-0.2C Medium-Manganese Steels

Abstract

Bibliography

Authors and Affiliations

Characteristic of DP600 Steel Produced in Hot Rolling Process

Abstract

Authors and Affiliations

Microstructure and Mechanical Properties of Hot-deformed AlMg4 Alloys with the Variations of Mn, Fe, and Si contents

Abstract

Authors and Affiliations

Effect of Final Rolling Temperature on Microstructure, Properties and Texture of Hot Rolled Strip by New Endless Rolled Line

Abstract

Authors and Affiliations

Production Line Modelling in Accordance with the Industry 4.0 Concept as an Element of Process Management in the Iron and Steel Industry

Abstract

Authors and Affiliations

Effects of Hot rolling Reduction on Microstructural Evolution and Mechanical Properties of 1.25Cr-1Mo-0.5V-0.3C Steel for High-Speed Rail Brake Discs

Abstract

Authors and Affiliations