FIELD: metallurgy.
SUBSTANCE: steel 30"ХГСА" is heated in NaCl-KCl melt till temperature is 900°C, exposed for 2 hours, hardened in oil; then, triple hardening and heating in the same melt is performed up to 900°C with isothermal exposure during 10 seconds and oil hardening, and further, low tempering is performed at the temperature of 200°C during 1 hour.
EFFECT: improving strength and ductility.
1 tbl, 1 ex
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