| LI Yahan,TAN Chengxiang,LI Mengyao,TIAN Yubo,WANG Ran,ZHANG Yalong,WANG Qian,ZHANG Junwei,ZHANG Liang,YE Feng.Research Progress of Laser-cladding Fe-based Alloy Coating[J],53(6):11-27, 66 |
| Research Progress of Laser-cladding Fe-based Alloy Coating |
| Received:March 12, 2023 Revised:August 13, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.06.002 |
| KeyWord:laser cladding Fe-based coating research progress material system process parameter external field auxiliary |
| Author | Institution |
| LI Yahan |
School of Materials and Metallurgy, University of Science and Technology Liaoning, Liaoning Anshan , China |
| TAN Chengxiang |
School of Materials and Metallurgy, University of Science and Technology Liaoning, Liaoning Anshan , China |
| LI Mengyao |
School of Materials and Metallurgy, University of Science and Technology Liaoning, Liaoning Anshan , China |
| TIAN Yubo |
School of Materials and Metallurgy, University of Science and Technology Liaoning, Liaoning Anshan , China |
| WANG Ran |
School of Materials and Metallurgy, University of Science and Technology Liaoning, Liaoning Anshan , China |
| ZHANG Yalong |
School of Materials and Metallurgy, University of Science and Technology Liaoning, Liaoning Anshan , China |
| WANG Qian |
School of Materials and Metallurgy, University of Science and Technology Liaoning, Liaoning Anshan , China |
| ZHANG Junwei |
School of Materials and Metallurgy, University of Science and Technology Liaoning, Liaoning Anshan , China |
| ZHANG Liang |
Fushun Longye Chemical Co., Ltd., Liaoning Fushun , China |
| YE Feng |
Shenyang Packaging Materials Co., Ltd., Shenyang , China |
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| Abstract: |
| As an advanced material surface modification technology, laser cladding uses laser beam with high energy density as the heat resource. By melting and solidifying the cladding material and substrate surface rapidly and simultaneously, the cladding layer with specific properties can be prepared on the substrate. Compared with other technologies, laser cladding has the advantages of high processing efficiency, low dilution rate, high bonding strength with substrate, high degree of automation and environmental friendliness, thus it has been successfully applied in machining, transportation, petrochemical and other fields. Among all kinds of cladding materials, Fe-based alloys are most similar to steel materials in composition, and their cost is relatively low compared with that of Ni-based and Co-based alloys. In recent years, Fe-based alloys have been widely used in the fields of surface strengthening and remanufacturing of equipment parts. Based on the latest studies in China and abroad, the research progress of laser cladding Fe-based alloy coatings is reviewed from the aspects of material system, process parameter, and application of external field auxiliary technology. Cladding materials play a crucial role in the properties of the coatings. The compatibility, wettability, chemical composition, and physical property differences between the cladding materials and substrate materials should be fully considered on the basis of working condition and performance requirement for selection of cladding materials. The characteristics and applications of various materials including Fe-based self-fluxing alloy powder, stainless steel powder, amorphous alloy powder, and Fe-based composite powder are summarized. The process parameters during the laser cladding process also play a significant role in the deposition rate, forming quality, phase composition, microstructure, and comprehensive properties of the coatings. The effect mechanisms of process parameters such as laser power, scanning speed, laser spot diameter, and powder feeding rate on the forming quality, microstructure, and properties of Fe-based coatings are systematically discussed. It is worth noting that actual laser cladding process is the interaction between multiple parameters, which can lead to a complex nonlinear relationship between the process parameters and quality of the cladding layers. Thus, the application of process parameter optimization in the preparation of high quality coatings is also introduced. Moreover, reasonable cladding material design and optimization of laser cladding process parameters can reduce the number of defects in the coating to a certain extent, but it is still difficult to completely eliminate the cracks in Fe-based coatings with high hardness. Meanwhile, the solidification characteristics of laser cladding through rapid heating and cooling can result in insufficient diffusion of elements in the molten pool, resulting in poor microstructure uniformity of the cladding layer, which ultimately affects its performance. Therefore, the applications of external field auxiliary technologies including ultrasonic vibration field, electromagnetic field, and temperature field in the laser cladding of Fe-based alloy coating are discussed in detail. The mechanism of external energy field on the melting pool and solidification structure during the laser cladding process is illustrated. Finally, the future development direction of laser cladding Fe-based alloy coating is prospected. |
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