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A study of multi-layer multi-pass laser depositing with 316L stainless steel wire

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Abstract

In this article, laser metal-wire depositing was conducted on 316 L stainless steel. Microstructures and mechanical properties of deposited samples were carefully studied employing an optical microscope (OM), scanning electron microscope (SEM) and other methodologies. A well-formed product was successfully acquired by means of process optimization including multi-layer single-pass and single-layer multi-pass laser deposition. The structures of multi-layer multi-pass deposited samples exhibited the characteristics of epitaxial column growth. The resulting ferrite at grain boundaries (GBs) revealed a subgrain structure. The brand structures between adjacent layers were composed of tiny cellular and columnar grains, meaning unexpected metallurgical bonding. The average hardness was 222 HV and no much fluctuation occurred in tested samples. The maximum tensile strength and elongation of deposited samples reached 110 % and 140 % of rolled samples, respectively. The uniformly-distributed dimples at the fracture proved that laser depositing product had good plasticity and ductility.

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Acknowledgments

This work was supported by the Natural Science Foundation of Hubei Province (Grant No. 2019CFB210). The authors also acknowledge the financial support from the 2020 open projects (No. KLATM202002) of Key Laboratory of Advanced Technologies of Materials, Ministry of Education China, Southwest Jiaotong University and the Fundamental Research Funds for the Central Universities (WUT: 203104005).

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Authors and Affiliations

  1. State Key Laboratory of Materials Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, China

    Fei Yan, Yuanqing Luo & Chunming Wang

  2. Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan, 430070, China

    Fei Yan

  3. Key Laboratory of Advanced Technologies of Materials, Ministry of Education China, Southwest Jiaotong University, Chendu, 610031, China

    Fei Yan

Authors
  1. Fei Yan
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  2. Yuanqing Luo
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  3. Chunming Wang
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Correspondence to Chunming Wang.

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Recommended by Editor Hyung Wook Park

Fei Yan received his Doctor’s degree in Material Processing Engineering from Huazhong University of Technology, China, in 2015. He is a Lecturer at the School of Automobile Engineering, Wuhan University of Technology, China. His research is focused on the lightweight of automobile.

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Yan, F., Luo, Y. & Wang, C. A study of multi-layer multi-pass laser depositing with 316L stainless steel wire. J Mech Sci Technol 35, 1681–1687 (2021). https://doi.org/10.1007/s12206-021-0331-8

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  • DOI: https://doi.org/10.1007/s12206-021-0331-8

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