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Experimental Study on the Performance of Composite Gradient Reinforced Cladding Layer of Ductile Iron IN625/Co12

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Abstract

Ductile iron has comprehensive properties that are similar to steel, making it is widely used for core components in key equipment such as the automotive engine crankshafts, machine tool beds, cylinder liners, and brake levers. However, the material has inherent structural defects such as the cracks, shrinkage, and subcutaneous porosity, which can easily lead to parts failure due to fracture, wear, and corrosion. Therefore, it is significant to repair and strengthen the surface for ductile iron. Laser cladding has several advantages, including low thermal deformation and high bond strength, which provides an effective method for repairing and strengthening ductile iron parts. For parts with serious area damage, a single-track cladding cannot meet the requirements for use, multi-track overlapping and multilayer cladding processes are typically used for repair and strengthening. Nickel-based and cobalt-based alloys are often utilized to reinforce the surface of core parts due to high-temperature resistance, oxidation resistance, and low deformation. The Co12 lattice structure is susceptible to thermal transformation, which can cause cracking for the cladding layer, making it is primarily used as a top cladding material. In this study, IN625 powder was used as the base of multilayer cladding, followed by Co12 powder. The hardness, wear resistance, corrosion resistance, and other properties for cladding layer were analyzed. The results show that the multi-track overlapping process has a high metallurgical bonding effect, and the grain in the lap remelting area is refined. Through multilayer cladding, the overall hardness for the ductile iron exceeds 500 HV, and the mechanical properties are significantly improved. The corrosion rate reduces by 395.5 times, and the corrosion resistance is improved.

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Funding

This work was supported by Applied Basic Research Project of Liaoning Province (2023JH2/101300226).

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Authors and Affiliations

  1. College of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan, 114051, Liaoning, China

    Chang Li, Mingyang Zhang, Menghui Yu & Xing Han

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  1. Chang Li
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  2. Mingyang Zhang
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  3. Menghui Yu
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  4. Xing Han
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Contributions

CL and MZ are responsible for manuscript writing and experimental work. MY and XH contributed to data extraction and format correction of the article. All the authors read and approved the final manuscript.

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Correspondence to Chang Li.

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Li, C., Zhang, M., Yu, M. et al. Experimental Study on the Performance of Composite Gradient Reinforced Cladding Layer of Ductile Iron IN625/Co12. J. of Materi Eng and Perform (2023). https://doi.org/10.1007/s11665-023-08902-5

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  • DOI: https://doi.org/10.1007/s11665-023-08902-5

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