FIELD: metallurgy.
SUBSTANCE: alloy steel blank of 9XC, 9X type is subjected to preliminary mechanical treatment, heat hardening, final machining and application of fluorine-containing antifriction coating to the working surfaces of fluorine-containing antifriction coating in the form of perfluoro acid of 6 MPA-180 grade.
EFFECT: increased accuracy and quality of treated surface of shells.
4 cl, 1 dwg
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