MATERIAL WITH HIGH WEAR RESISTANCE Russian patent published in 2015 - IPC B22F3/15 

FIELD: metallurgy.

SUBSTANCE: invention refers to metallurgy, particularly to production of ledeburite tool steel by powder metallurgy method. Method of obtaining a material with isotropic mechanical properties, enhanced wear resistance and high tempering potential involves obtainment of powder out of ledeburite tool steel by powder metallurgy method by spraying liquid steel with nitrogen, and further obtainment of HIP blank by hot isostatic compression of the powder. The blank is overannealed at temperature above 1100°C and at least by 10°C below melting point of the most low-melting phase of steel structure for over 12 hours to ensure that average amount of carbide phase inclusions increases at least by 65%, inclusion surface rounding and matrix homogenisation, then the blanc is refined by quenching with further tempering . Material shows good isotropic mechanical properties, and share of carbide phases M₆C- and MC carbides comprises at least 7.0 vol % after thermal refining, with average size of carbide phase inclusions over 2.8 mcm in the matrix. Carbon content in the matrix is 0.45-0.75 wt %.

EFFECT: material shows high wear resistance.

9 cl, 10 dwg, 2 tbl