Fe-mn-al-c-ni light weight steel and laser additive manufacturing method and application thereof
By mixing Fe-Mn-Al-C and Ni powders with different particle sizes and combining laser selective melting with short-time aging treatment, the problem of the imbalance between strength and plasticity in Fe-Mn-Al-C-Ni lightweight steel was solved, achieving high density and excellent mechanical properties while reducing manufacturing costs.
CN122142346APending Publication Date: 2026-06-05GREATER BAY AREA UNIV (IN PREPARATION)
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GREATER BAY AREA UNIV (IN PREPARATION)
- Filing Date
- 2026-03-11
- Publication Date
- 2026-06-05
Smart Images
Figure CN122142346A_ABST
Abstract
The application belongs to the technical field of metal additive manufacturing, and discloses a Fe-Mn-Al-C-Ni light steel and a laser additive manufacturing method and application thereof. The method first mixes Fe-Mn-Al-C pre-alloy powder with a particle size of 15-53 microns and Ni powder with a particle size of 5-20 microns to obtain mixed powder with bimodal distribution of particle size; then the mixed powder is printed on a substrate under inert gas protection by using a laser selective melting method to obtain a printed blank, and the printed blank is treated by short-time aging and then quenched to obtain the Fe-Mn-Al-C-Ni light steel. Through the synergistic effect of powder grading, in-situ alloying by additive manufacturing and short-time aging, the continuous network distribution of brittle B2 phase at the grain boundary is effectively avoided, a component with a density of >99%, a yield strength of >1280 MPa and an elongation after fracture of >24% is obtained, the technical problem of strength and plasticity balance of light steel additive manufacturing is solved, and excellent matching of high strength and high plasticity is achieved.
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