Advances in shape-control modification technology for wire and arc additive manufacturing

• 1、College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics, Nanjing 211106

Abstract：Wire and arc additive manufacturing (WAAM) has attracted much attention in recent years due to its advantages of high material utilization, short production cycles, and the ability to directly form complex structures. However, arc additive technology still faces challenges such as poor surface quality of primary formations and difficulty in regulating the organizational properties, which cannot fully meet the needs of aerospace, nuclear power, and other large-scale parts manufacturing. This paper reviews domestic and international research progress in the regulation of organizational properties and forming accuracy in arc additive manufacturing components. The regulation methods are divided into three categories based on their application time: forming process optimization before arc additive, synchronous interlayer regulation during the arc additive process, and post-processing regulation after arc additive. Each method is described in terms of its principles, existing problems, and the future development direction of shape-controlling and modification technology in arc additive manufacturing.

Keywords： Arc additive manufacturing Surface forming Microstructure properties