A study published in Materials Science and Engineering: A on October 6 investigated cobalt-free maraging steel produced by wire-arc directed energy deposition (wire-arc DED), where high-temperature solution treatment, although mitigating microsegregation, coarsens the hierarchical martensitic structure. The research team subjected the solution-treated steel to 1–4 austenitization-quenching cycles near the Ac3 temperature (830 °C) (cyclic quenching treatment, CQT), followed by aging. Three cycles suffice to significantly refine the effective grains, and combined with aging, yield a synergistic improvement in strength and toughness. After heat treatment, the steel achieves a tensile strength of 1907 MPa and an elongation of 11.5%; the strength-toughness balance stems from martensite refinement and the TRIP effect of retained austenite. The cobalt-free composition design avoids the high cost and supply chain risks associated with cobalt, aligning with cost-reduction needs in industrial applications such as tooling and dies. Value for powder buyers: (1) This process is aimed at the wire route, so direct demand for metal powders is limited; (2) cobalt-free maraging steel processed by wire-arc additive manufacturing plus cyclic quenching can provide an alternative route for forged/cast dies and large tool steel components, indirectly expanding the metal additive manufacturing equipment market; (3) it is recommended to include the CQT process in tracking post-processing technology routes for wire-arc additive manufacturing and to monitor its potential transfer to powder bed processes.