Mechanical and physical properties of cast Fe-Mn-Al-C-N alloys

Cast Fe + 12.7–25.6% Mn + 0–14.4% Al + 0.02–2.18% C alloys are produced and studied, including high-strength materials microalloyed with nitrogen (0.001–0.135% N). Cast high-carbon, high-alloy Fe-Mn-Al-C alloys undergo hot deformation with 40–50% reduction, without hot-crack formation. In moderate-temperature deformation, a high-strength state (with σ u up to 1810 MPa) appears in such alloys, with sufficient margin of plasticity (up to 50%). The yield point of high-carbon (up to 2.18% C) austenitic Fe-Mn-Al-C alloys at room temperatures reaches 1200 MPa. The specific heat and thermal conductivity of these alloys decline with increase in the total Al + C + N content. Strong iron alloys with high Mn and Al content may be used in the cast and deformed state to obtain a combination of hot strength, large margin of plasticity, thermal stability, and wear resistance.