Abstract
With the rapid development of high power laser, laser welding has been widely used in many fields including manufacturing, metallurgy, automobile, biomedicine, electronics, aerospace etc. Because of its outstanding advantages, such as high energy density, small weld size, easy automation. Combining the two heat sources of laser and arc for welding can achieve excellent results due to the synergistic effect. Laser welding is a complicated physical and chemical metallurgical process, involving the laser beam and molten pool, keyholes and materials melting, evaporation and multiple physical process. Process monitoring and quality control are important content of research and development in the field of laser welding, which is the premise to obtain fine weld with high quality. Numerical simulation technology can describe many complex physical phenomena in welding process, which is very important to predict weld forming and quality and clarify the underline mechanism. In this paper, the research progress of process monitoring, quality control and autonomous intelligent design of laser and laser-arc hybrid welding based on numerical simulation were reviewed, and the research hotspots and development trends of laser welding in the future are predicted.
Highlights
With the requirement of industrial development for high efficiency, environmental protection and automation, the application of laser technology is rapidly popularized in many fields of manufacturing industry [1,2,3,4,5,6]
This paper systematically introduces and summarizes the research progress of laser and laser-arc hybrid welding process monitoring, quality control and independent intelligent design based on numerical simulation, and points out the existing problems, which is of guiding significance for the research of laser welding and laser arc-hybrid welding in the future
They found that when Zr ring was added into the fusion zone, ZrO2 was preferentially formed in the grain interior, which alleviated the segregation of MoO2 and improved the tensile strength greatly
Summary
With the requirement of industrial development for high efficiency, environmental protection and automation, the application of laser technology is rapidly popularized in many fields of manufacturing industry [1,2,3,4,5,6]. Because of its many advantages such as low heat input, small deformation, rapid cooling rate and high energy beam concentration, laser welding has good material adaptability. It can weld homogeneous materials and suitable for welding dissimilar materials [17,18,19,20,21]. In order to ensure the quality of laser welding, give full play to its advantages of high speed and efficiency, and speed up its application process, revealing the mechanism, predicting and controlling the welding process is very difficult and important. The research hotspots and development trends of laser welding and laser-arc hybrid welding are forecasted
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