Abstract:  In view of the fact that the cold metal transfer(CMT)wire arc additive manufacturing technology existed some problems, such as poor surface forming quality, easy formation of internal pores and other metallurgical defects in the parts, and difficulty in controlling microstructure and properties, the research status of the CMT wire arc additive manufacturing technology was reviewed from the aspects of the shape and property control. Firstly,the principle and characteristics of the CMT technology were analyzed and sorted out. Secondly, the control methods of the CMT wire arc additive manufacturing technology in the field of “shape” and “property” were summarized, and the control methods in three aspects of the surface forming quality, internal metallurgical defects, microstructure and properties of parts were expounded in detail.Finally,the future development trend of the CMT wire arc additive manufacturing technology was proposed by analyzing the limitations of the existing control methods. The results show that the development and research trend of the CMT wire arc additive manufacturing technology in the future includes the coordinated control and optimization of “shape” and “property”, the CMT wire arc additive manufacturing of the refractory materials and composite materials, and the theoretical mechanism and regulation rules of the control methods.

Key words:  cold metal transfer (CMT); wire arc;additive manufacturing(AM）;research progress;surface forming quality; internal metallurgical defects; microstructure