There are investigated peculiarities of hardening through ageing of steel 10G7M3S2AFTYu weld with powder wire. It is defined that ageing at the temperature of 550ºC during 6 hours ensures the highest degree of strengthening of ferrite steel 10G7M3S2AFTYu. It is proved that the mechanism of steel strengthening as a result of ageing is determined with the Ti2CN, V1.98Ti0.02, VC combinations mainly.

It is shown that the structure of metal padded with powder wire having the following mixture: 15% Cr – 0,5% B4C – 0,5% BN – 2,5% TiB2 – 1,0% ZrB2, is a martensitic matrix with (Fe, Cr)2B boride eutectic, carbon boride of (Fe, Cr)7(C, B)3 type and ε –(Fe, Cr)2-3N nitrides. Such a wire can be used for strengthening weld deposition of parts operated under conditions of heavy friction loading.