Hardfacing of GX40CrNiSi25-20 cast stainless steel with an austenitic manganese steel electrode

Ion Mitelea; Daniela Cosma; Olimpiu Karancsi; Mircea Burcă; Corneliu Marius Crăciunescu; Ion-Dragoş Uțu

doi:10.1515/mt-2024-0124

Article

Hardfacing of GX40CrNiSi25-20 cast stainless steel with an austenitic manganese steel electrode

Ion Mitelea
Dr. Ion Mitelea, born 1946, is currently a Professor of Materials Science, Materials and Heat Treatments for Welded Structures and Selection and Use of Engineering Materials at University Politehnica Timisoara, Romania.
, Daniela Cosma , Olimpiu Karancsi
Dr. Olimpiu Karancsi, born 1976, is a lecturer at Victor Babes University of Medicine and Pharmacy, Timisoara, Romania and a specialist in oral implantology and prosthetic restorations on implants.
, Mircea Burcă
Dr. Mircea Burcă, born 1955, is lecturer within Materials and Manufacturing Engineering Department at University Politehnica Timisoara. His is involved in joining of materials by welding processes.
, Corneliu Marius Crăciunescu
Dr. Corneliu Marius Crăciunescu, born 1960, is a Professor of Materials Science at the Department of Materials and Manufacturing Engineering at University Politehnica Timisoara. His main research area is magnetic shape memory alloys.
and Ion-Dragoş Uțu
Dr. Ion-Dragoş Uțu, born 1978, graduated from University Politehnica Timisoara, Romania, as a Bachelor and PhD, and is currently Professor in the Material Science and Manufacturing department at University Politehnica Timisoara, Romania.

Published/Copyright: October 15, 2024

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From the journal Materials Testing Volume 66 Issue 12

Abstract

To enhance the wear and corrosion resistance of engineering components, various surface modification techniques have been devised. Among these, arc welding processes employing specialized electrodes offer relatively straightforward methods with low production costs for hardfacing applications. This paper focuses on the hardfacing process using pulsed current arc welding to reinforce cast austenitic steel structural components, aiming to prolong their lifespan. Typically, hardfacing coatings utilize Fe, Ni, and Co-based alloys. Among these, Fe-based alloys, such as manganese austenitic alloys employed in our experiments, are favored for their robust mechanical work hardening capacity, resulting in significant hardness enhancements (from 186–219 HV5 in the as-deposited layer to 468–492 HV5 after mechanical work hardening) under intense wear and impact conditions. The innovation of the hardfacing process developed in this study lies in utilizing a universal TIG source adapted for manual welding with a covered electrode in pulsed current mode. This hardfacing technique can be applied to both worn components in operation and new ones before being put into service, thereby ensuring long-term durability and reducing maintenance costs.

Keywords: hardfacing process; austenitic manganese alloy; pulsed current welding

Corresponding author: Ion-Dragoş Uțu, Department of Materials Science and Engineering, Politehnica University Timisoara, Timisoara, Romania, E-mail: dragos.utu@upt.ro

Funding source: Romanian Ministry of Education and Research

Award Identifier / Grant number: CNCSâ€UEFISCDI, project number PN-IV-P1-PCE-2023

About the authors

Ion Mitelea

Dr. Ion Mitelea, born 1946, is currently a Professor of Materials Science, Materials and Heat Treatments for Welded Structures and Selection and Use of Engineering Materials at University Politehnica Timisoara, Romania.

Olimpiu Karancsi

Dr. Olimpiu Karancsi, born 1976, is a lecturer at Victor Babes University of Medicine and Pharmacy, Timisoara, Romania and a specialist in oral implantology and prosthetic restorations on implants.

Mircea Burcă

Dr. Mircea Burcă, born 1955, is lecturer within Materials and Manufacturing Engineering Department at University Politehnica Timisoara. His is involved in joining of materials by welding processes.

Corneliu Marius Crăciunescu

Dr. Corneliu Marius Crăciunescu, born 1960, is a Professor of Materials Science at the Department of Materials and Manufacturing Engineering at University Politehnica Timisoara. His main research area is magnetic shape memory alloys.

Ion-Dragoş Uțu

Dr. Ion-Dragoş Uțu, born 1978, graduated from University Politehnica Timisoara, Romania, as a Bachelor and PhD, and is currently Professor in the Material Science and Manufacturing department at University Politehnica Timisoara, Romania.

Research ethics: Not applicable.
Informed consent: Not applicable.
Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
Use of Large Language Models, AI and Machine Learning Tools: None declared.
Conflict of interest: The authors state no conflict of interest.
Research funding: This project is supported by a grant from the Romanian Ministry of Education and Research, CNCS–UEFISCDI, project number PN-IV-P1-PCE-2023-1425.
Data availability: Not applicable.

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Published Online: 2024-10-15

Published in Print: 2024-12-17

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https://doi.org/10.1515/mt-2024-0124

Keywords for this article

hardfacing process; austenitic manganese alloy; pulsed current welding