Abstract
A modified alloy powder includes a powdered alloy (1); and a carbide powder (2), mixed in the powdered alloy (1); wherein the carbide powder (2 )has a particle size smaller than that of the powdered alloy (1), and the carbide powder (2) is dedicated to powder bed selective laser melting and laser metal deposition technology. Being used as a grain refiner and a grain growth inhibitor, the effect of refinement in the grain size of final products and improvement of the workpiece strength can be achieved.