Control of the bainitic structure for a wear-resisting hard-faced rail track

Piyada Suwanpinij; Thanaporn Thonondaeng; Parinya Kumma; Bandit Suksawat; Gobboon Lothongkum

doi:10.1515/mt-2021-2076

Article

Control of the bainitic structure for a wear-resisting hard-faced rail track

Piyada Suwanpinij
Piyada Suwanpinij, born in 1980, achieved her BEng degree in Metallurgical Engineering at Chulalongkorn University, Thailand, and her MMet in Advanced Metallurgy at the University of Sheffield, UK. She obtained her doctoral degree in Ferrous Metallurgy from RWTH Aachen University in Germany. She has experience in the modeling of phase transformation and characterization of high-strength steels as well as other metals. The application of synchrotron radiation for material characterization is one of her feature interest. She was a lecturer at the The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok (KMUTNB), Bangkok, Thailand. Currently, she is working as the head of working group Metallurgy and Metal Forming, Leibniz-Institut für Werkstofforientierte Technologien (IWT), Bremen, Germany.
, Thanaporn Thonondaeng
Thanaporn Thonondaeng, born 1989, finished her BEng degree and pursued her doctoral degree in Materials Engineering at KMUTNB, Thailand. She has experience in dissimilar metals welding, destructive testing and non-ferrous Welding Metallurgy. She is currently a lecturer at the College of Industrial Technology (CIT), KMUTNB.
, Parinya Kumma
Parinya Kumma, received his B.Ind.Tech. degree in Welding Technology and M.Tech.Ed. in Mechanical Engineering from KMUTNB in 1999 and 2016, respectively. He carries out research work in welding technology and metal forming technique. He obtained the professional license of NDT level 2 in PT, MT, UT and RT inspection methods. He is an engineer at the Department of Teacher Training in Mechanical Engineering, FTE, KMUTNB.
, Bandit Suksawat
Bandit Suksawat, born 1977, succeeded his B.Tech.Ed degree in Mechanical Engineering from KMUTNB, and his MEng in Agricultural Engineering at Kasetsart University, Thailand. Since 2004, he got a scholarship from the Japanese Government (Monbukagakusho: MEXT) to study MEng and DEng major in Precision Engineering at Chuo University, Japan. He researches in machine tool and mechanical design. In the past decade, he has experience in welding advanced high-strength steel and fabrication of structural steel. Currently, he is a lecturer at the Department of Teacher Training in Mechanical Engineering, Faculty of Technical Education (FTE), KMUTNB.
and Gobboon Lothongkum
Gobboon Lothongkum, born in 1960, is a professor and a member of the Innovative Metals Research Unit, Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand. He served as the Head of the Department from 2015 to 2019. He has been the acting President of Thai Corrosion of Metals and Materials Association since 2015. He received his Dr.-Ing. degree at the Helmut-Schmidt-University/University of the Federal Armed Forces Hamburg, Germany, and the International Welding Engineer Certificate of the International Institute of Welding in 1994 and 2006, respectively. His areas of expertise include corrosion of metals and alloys, welding and metal joining, stainless steel and high-temperature materials.

Published/Copyright: February 21, 2022

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From the journal Materials Testing Volume 64 Issue 1

Abstract

Carbide-free bainite with filmlike retained austenite structure has been reported for its higher wear resistance and toughness compared with conventional bainite and pearlite structure. In order to take advantage from such beneficial structure, this study employs the surface welding method with self-shielded wire electrode containing low carbon (0.15 mass%), high silicon, and nickel on two pearlitic rail steels, R260 and R350HT. The preheating temperature and other welding parameters were carefully selected to avoid too high dilution, which leads to martensite formation. The weld metal, heat-affected zone, and base material were investigated by scanning electron microscopy. Microhardness and wear tests were carried out to ensure improved properties after the surface repair. The results show significant improvements in hardness and wear rate in weld metal compared with the base material.

Keywords: carbide-free bainite; flux-cored arc welding; rail steel; surface welding; wear resistance

Corresponding author: Piyada Suwanpinij, Leibniz-Institut für Werkstofforientierte Technologien – IWT, 28359 Bremen, Germany, E-mail: suwanpinij@iwt-bremen.de

Funding source: Thailand Research Fund

Award Identifier / Grant number: MRG6080223

About the authors

Piyada Suwanpinij

Piyada Suwanpinij, born in 1980, achieved her BEng degree in Metallurgical Engineering at Chulalongkorn University, Thailand, and her MMet in Advanced Metallurgy at the University of Sheffield, UK. She obtained her doctoral degree in Ferrous Metallurgy from RWTH Aachen University in Germany. She has experience in the modeling of phase transformation and characterization of high-strength steels as well as other metals. The application of synchrotron radiation for material characterization is one of her feature interest. She was a lecturer at the The Sirindhorn International Thai-German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok (KMUTNB), Bangkok, Thailand. Currently, she is working as the head of working group Metallurgy and Metal Forming, Leibniz-Institut für Werkstofforientierte Technologien (IWT), Bremen, Germany.

Thanaporn Thonondaeng

Thanaporn Thonondaeng, born 1989, finished her BEng degree and pursued her doctoral degree in Materials Engineering at KMUTNB, Thailand. She has experience in dissimilar metals welding, destructive testing and non-ferrous Welding Metallurgy. She is currently a lecturer at the College of Industrial Technology (CIT), KMUTNB.

Parinya Kumma

Parinya Kumma, received his B.Ind.Tech. degree in Welding Technology and M.Tech.Ed. in Mechanical Engineering from KMUTNB in 1999 and 2016, respectively. He carries out research work in welding technology and metal forming technique. He obtained the professional license of NDT level 2 in PT, MT, UT and RT inspection methods. He is an engineer at the Department of Teacher Training in Mechanical Engineering, FTE, KMUTNB.

Bandit Suksawat

Bandit Suksawat, born 1977, succeeded his B.Tech.Ed degree in Mechanical Engineering from KMUTNB, and his MEng in Agricultural Engineering at Kasetsart University, Thailand. Since 2004, he got a scholarship from the Japanese Government (Monbukagakusho: MEXT) to study MEng and DEng major in Precision Engineering at Chuo University, Japan. He researches in machine tool and mechanical design. In the past decade, he has experience in welding advanced high-strength steel and fabrication of structural steel. Currently, he is a lecturer at the Department of Teacher Training in Mechanical Engineering, Faculty of Technical Education (FTE), KMUTNB.

Gobboon Lothongkum

Gobboon Lothongkum, born in 1960, is a professor and a member of the Innovative Metals Research Unit, Department of Metallurgical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, Thailand. He served as the Head of the Department from 2015 to 2019. He has been the acting President of Thai Corrosion of Metals and Materials Association since 2015. He received his Dr.-Ing. degree at the Helmut-Schmidt-University/University of the Federal Armed Forces Hamburg, Germany, and the International Welding Engineer Certificate of the International Institute of Welding in 1994 and 2006, respectively. His areas of expertise include corrosion of metals and alloys, welding and metal joining, stainless steel and high-temperature materials.

Acknowledgements

We thank the team members: Panita Choeychom, Martin Hübner, Piyapat Chuchuay, Kaweewat Worasaen as well as those who are not mentioned. The rail materials were received from Italian-Thai Development Public Company Limited and the State Railway of Thailand.

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: This work was based on the project MRG6080223 granted by the former Thailand Research Fund (TRF) and Office of the Higher Education Commission (OHEC) and received additional grant with contract no. FDA-CO-2561-7209-TH from National Science and Technology Development Agency (NSTDA).
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Published Online: 2022-02-21

Published in Print: 2022-01-27

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Articles in the same Issue

https://doi.org/10.1515/mt-2021-2076

Keywords for this article

carbide-free bainite; flux-cored arc welding; rail steel; surface welding; wear resistance