Abstract
1. Alloying austenitic chromium-manganese-nickel steel 5Kh20N4AG9 with phosphorus in amounts up to 0.2% improves the mechanical properties of the steel at elevated and room temperatures. 2. The best combination of mechanical properties is obtained by alloying with 0.2% P and up to 1% Mo. 3. The addition of about 0.2% P increases the intensity of precipitation hardening (carbides of the Cr23C6 type and Cr2N nitrides) after quenching and subsequent aging. Phosphorus does not enter into the composition of the carbides and nitrides but is found in the solid solution.
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