In order to investigate the process of laser cladding(LC)Inconel 625 alloy powder on Q235 steel plate,this paper focuses on analyzing the effects of different process parameters on the temperature field,stress field a...In order to investigate the process of laser cladding(LC)Inconel 625 alloy powder on Q235 steel plate,this paper focuses on analyzing the effects of different process parameters on the temperature field,stress field and flow behavior of the molten pool through a combination of finite element simulation and experiment.The simulation part established a geometric model,applied the Goldak double el-lipsoid heat source model,and simulated the LC process by varying the laser power and scanning speed.For the experimental part,LC equipment was used,parameters such as laser power and scanning speed were adjusted,and the molten pool dynamics were observed by in-frared temperature measurement and high-speed photography.The results show that the laser power and scanning speed are the key factors affecting the quality of cladding,and the experimental observation coincides with the simulation results,which verifies the validity of the simulation method and provides theoretical basis and experimental support for the optimization of the LC process.展开更多
Submerged arc welding process has been simulated to investigate the molten pool features of EH36 shipbuilding steel.One case only involved the surface tension model,and another one involved both the surface tension mo...Submerged arc welding process has been simulated to investigate the molten pool features of EH36 shipbuilding steel.One case only involved the surface tension model,and another one involved both the surface tension model and the interface tension model.The role of interface tension during welding is revealed,and the evolution of molten pool morphology is understood by comparing the surface temperature distribution,surface tension and interface tension distribution,and the streamline of the molten pool for the two cases.When the interface tension model is disregarded,a flow conducive to the outward expansion is formed in the surface area of the molten pool,resulting in a small weld depth-to-width ratio.After applying the interface tension model,the expanding outward flow is restrained,which leads to a deep penetration morphology with a large weld depth-to-width ratio due to the inward flow governed by the Marangoni forces.The simulation results involving the interface tension model have been verified with satisfactory predictability.展开更多
基金supported by Natural Science Foundation of Shandong Province of China(Grant No.ZR2023ME201)Qingdao Key Technology Research and Industrialization Demonstration Project(23-1-2-qljh-17-gx).
文摘In order to investigate the process of laser cladding(LC)Inconel 625 alloy powder on Q235 steel plate,this paper focuses on analyzing the effects of different process parameters on the temperature field,stress field and flow behavior of the molten pool through a combination of finite element simulation and experiment.The simulation part established a geometric model,applied the Goldak double el-lipsoid heat source model,and simulated the LC process by varying the laser power and scanning speed.For the experimental part,LC equipment was used,parameters such as laser power and scanning speed were adjusted,and the molten pool dynamics were observed by in-frared temperature measurement and high-speed photography.The results show that the laser power and scanning speed are the key factors affecting the quality of cladding,and the experimental observation coincides with the simulation results,which verifies the validity of the simulation method and provides theoretical basis and experimental support for the optimization of the LC process.
基金The authors sincerely thank the National Natural Science Foundation of China(Grant Nos.U20A20277,52150610494,52104295,52011530180 and 52050410341)Research Fund for Central Universities(Grant Nos.N2125016 and N2025025)Young Elite Scientists Sponsorship Program by CAST(YESS)(Grant No.2021-2023QNRC001).
文摘Submerged arc welding process has been simulated to investigate the molten pool features of EH36 shipbuilding steel.One case only involved the surface tension model,and another one involved both the surface tension model and the interface tension model.The role of interface tension during welding is revealed,and the evolution of molten pool morphology is understood by comparing the surface temperature distribution,surface tension and interface tension distribution,and the streamline of the molten pool for the two cases.When the interface tension model is disregarded,a flow conducive to the outward expansion is formed in the surface area of the molten pool,resulting in a small weld depth-to-width ratio.After applying the interface tension model,the expanding outward flow is restrained,which leads to a deep penetration morphology with a large weld depth-to-width ratio due to the inward flow governed by the Marangoni forces.The simulation results involving the interface tension model have been verified with satisfactory predictability.
