Fe-based amorphous alloy has attracted great attention due to its excellent soft magnetic properties

high hardness

high strength and other advantages. However

the size of Fe-based amorphous alloys prepared by copper mold casting in laboratory and industrial fields are still small

which seriously restricts the practical application of Fe-based amorphous alloys as structural materials in industrial fields. The laser 3D printing method provides an opportunity to solve these problems. However

according to the current research reports at home and abroad

there are serious cracks in Fe-based amorphous alloy prepared by laser 3D printing technology

so it is impossible to use this technology to shape large size Fe-based amorphous alloy samples. In this paper

a second phase with better plasticity was introduced into Fe-based amorphous alloy to absorb thermal stress and prevent the cracking of Febased amorphous alloy in the process of laser 3D printing

and large size Fe-based amorphous alloy composites were successfully printed. It is found that the large-size Fe-based amorphous alloy composites formed by the above method have no macroscopic cracks and have good formability

but microcosmic cracks are still found in the local area of Fe-based amorphous alloy. Since Cu wrapped Fe-based amorphous alloy in the middle

these local microcracks did not expand

so it did not run through the whole material

so that the molding property of the printed Fe-based amorphous alloy composite material was not greatly affected.