Nitrogenous nickel-based deposited metal was prepared by gas metal arc welding. Subsequently, solid solution treatment as well as solution and aging treatments were carried out to study the evolution of microstructure and tensile properties in different states. The results show that the high temperature tensile strength of the deposited metal exhibits good performance with the addition of W and N. The grain size of the alloy is large and petal-like Laves phase appears at the grain boundaries. After solid solution treatment, the grain size decreased and the Laves phase disappeared. However, the yield strength and elongation of the deposited metal decreased. The grain size of the solid solution and aging treated samples was more uniform. Nanoscale M(C,N) phases precipitated within the crystals and M₂₃C₆ phase formed at grain boundaries. The yield strength and ultimate tensile strength were higher than the other samples, but the plasticity was the lowest. The main deformation mechanism is the unit dislocation a/2<110> cutting precipitation phase.