FIELD: metallurgy. SUBSTANCE: articles are heated at temperatures of 200-250 C for 20-30 min. Final heating for hardening is carried out at 758-768 C for 22-25 min, and cooling is effected in aqueous solution of common salt with density of 1.085 g/cu.m at temperature of 20-25 C with subsequent tempering at 100 C by boiling for 2 h. EFFECT: higher strength of treated articles. 1 tbl
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