Effects of scanning speed on the microstructure, hardness and corrosion properties of high-speed laser cladding Fe-based stainless coatings
Fe-based coatings have been prepared by utilizing laser cladding with the scanning speed ranging from 1.57 to 20.4 m/min. The microstructure and corrosion properties have been further investigated to evaluate the effects of scanning speed. The results show that, both coating's thickness and dil...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-03-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424003806 |
| _version_ | 1797247845873483776 |
|---|---|
| author | Yongxin Jian Yakun Liu Hongjun Qi Peipei He Guosheng Huang Zhifu Huang |
| author_facet | Yongxin Jian Yakun Liu Hongjun Qi Peipei He Guosheng Huang Zhifu Huang |
| author_sort | Yongxin Jian |
| collection | DOAJ |
| description | Fe-based coatings have been prepared by utilizing laser cladding with the scanning speed ranging from 1.57 to 20.4 m/min. The microstructure and corrosion properties have been further investigated to evaluate the effects of scanning speed. The results show that, both coating's thickness and dilution rate gradually decrease with the increase of scanning speed. However, the deposition efficiency on the surface can be greatly improved by around 4 times. Under high scanning speed, the Fe-based coatings show the similar microstructure feature, comprising with dendrites and inter-dendritic structures. But the coating's microstructure can be significantly refined with the secondary dendritic arm spacing less than 1 μm. Furthermore, the gap of Cr concentration between the two structures can be effectively reduced, which shrinks the difference in corrosion resistance. On the other hand, the Fe-based coating's hardness gradually decreases resulting from the retained austenite and ferrite under high scanning speed. Compared to Q235 steel, the cladded Fe-based coatings show superior corrosion resistance with much higher corrosion potential and lower corrosion current density. Pitting dominates the corrosion forms of high-speed laser Fe-based coatings, which initially takes place on the boundaries of different structures. With the increase of scanning speed, the coating's corrosion resistance increases firstly and then decreases, and the coating cladded with the speed of 15.7 m/min shows the best corrosion resistance. Higher average Cr content and more uniform Cr distribution account for the better corrosion resistance. However, excessive microstructure refinement plays a negative role in the coating's corrosion resistance owing to more grain boundaries. |
| first_indexed | 2024-03-08T00:01:19Z |
| format | Article |
| id | doaj.art-fbf4325291f14a81a409dbe116aa6eb6 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:05:10Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-fbf4325291f14a81a409dbe116aa6eb62024-03-24T06:58:16ZengElsevierJournal of Materials Research and Technology2238-78542024-03-012933803392Effects of scanning speed on the microstructure, hardness and corrosion properties of high-speed laser cladding Fe-based stainless coatingsYongxin Jian0Yakun Liu1Hongjun Qi2Peipei He3Guosheng Huang4Zhifu Huang5State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China; Corresponding author.State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaState Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaState Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao, China; Corresponding author.State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, ChinaFe-based coatings have been prepared by utilizing laser cladding with the scanning speed ranging from 1.57 to 20.4 m/min. The microstructure and corrosion properties have been further investigated to evaluate the effects of scanning speed. The results show that, both coating's thickness and dilution rate gradually decrease with the increase of scanning speed. However, the deposition efficiency on the surface can be greatly improved by around 4 times. Under high scanning speed, the Fe-based coatings show the similar microstructure feature, comprising with dendrites and inter-dendritic structures. But the coating's microstructure can be significantly refined with the secondary dendritic arm spacing less than 1 μm. Furthermore, the gap of Cr concentration between the two structures can be effectively reduced, which shrinks the difference in corrosion resistance. On the other hand, the Fe-based coating's hardness gradually decreases resulting from the retained austenite and ferrite under high scanning speed. Compared to Q235 steel, the cladded Fe-based coatings show superior corrosion resistance with much higher corrosion potential and lower corrosion current density. Pitting dominates the corrosion forms of high-speed laser Fe-based coatings, which initially takes place on the boundaries of different structures. With the increase of scanning speed, the coating's corrosion resistance increases firstly and then decreases, and the coating cladded with the speed of 15.7 m/min shows the best corrosion resistance. Higher average Cr content and more uniform Cr distribution account for the better corrosion resistance. However, excessive microstructure refinement plays a negative role in the coating's corrosion resistance owing to more grain boundaries.http://www.sciencedirect.com/science/article/pii/S2238785424003806High-speed laser claddingScanning speedMicrostructureHardnessCorrosion properties |
| spellingShingle | Yongxin Jian Yakun Liu Hongjun Qi Peipei He Guosheng Huang Zhifu Huang Effects of scanning speed on the microstructure, hardness and corrosion properties of high-speed laser cladding Fe-based stainless coatings Journal of Materials Research and Technology High-speed laser cladding Scanning speed Microstructure Hardness Corrosion properties |
| title | Effects of scanning speed on the microstructure, hardness and corrosion properties of high-speed laser cladding Fe-based stainless coatings |
| title_full | Effects of scanning speed on the microstructure, hardness and corrosion properties of high-speed laser cladding Fe-based stainless coatings |
| title_fullStr | Effects of scanning speed on the microstructure, hardness and corrosion properties of high-speed laser cladding Fe-based stainless coatings |
| title_full_unstemmed | Effects of scanning speed on the microstructure, hardness and corrosion properties of high-speed laser cladding Fe-based stainless coatings |
| title_short | Effects of scanning speed on the microstructure, hardness and corrosion properties of high-speed laser cladding Fe-based stainless coatings |
| title_sort | effects of scanning speed on the microstructure hardness and corrosion properties of high speed laser cladding fe based stainless coatings |
| topic | High-speed laser cladding Scanning speed Microstructure Hardness Corrosion properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424003806 |
| work_keys_str_mv | AT yongxinjian effectsofscanningspeedonthemicrostructurehardnessandcorrosionpropertiesofhighspeedlasercladdingfebasedstainlesscoatings AT yakunliu effectsofscanningspeedonthemicrostructurehardnessandcorrosionpropertiesofhighspeedlasercladdingfebasedstainlesscoatings AT hongjunqi effectsofscanningspeedonthemicrostructurehardnessandcorrosionpropertiesofhighspeedlasercladdingfebasedstainlesscoatings AT peipeihe effectsofscanningspeedonthemicrostructurehardnessandcorrosionpropertiesofhighspeedlasercladdingfebasedstainlesscoatings AT guoshenghuang effectsofscanningspeedonthemicrostructurehardnessandcorrosionpropertiesofhighspeedlasercladdingfebasedstainlesscoatings AT zhifuhuang effectsofscanningspeedonthemicrostructurehardnessandcorrosionpropertiesofhighspeedlasercladdingfebasedstainlesscoatings |