Abstract：High strength steel with excellent strength and toughness played an important role in aerospace and other
fields. The large key heavy-duty components were difficult to forge and had high requirements for hot working,
this limited its further development and application. Metal additive manufacturing technology can realize rapid
forming of metal components with high performance and precision, which provides a new way for manufacturing
the high strength steel. In this paper, the classification of metal additive manufacturing technology at present, the
forming characteristics of additive manufactured high strength steel, and the microstructure evolution and mechanical
properties of high strength steel were introduced. The results show that the process parameters have great influence
on the density of additive manufacturing high-strength steel, width and height of cladding layer, and then
affect the internal quality of forming components. Heat accumulation can make the interlayer microstructure
become thicker, and at the same time the microstructure of different parts have different solid phase transformation,
which makes the microstructure of high strength steel more complicated. Heat treatment can significantly improve
the comprehensive mechanical properties of additive manufacturing high strength steel. Finally, the aspects that
need further research in additive manufacturing high strength steel are prospected.
2022, Vol. 32 
