Abstract
The wear resistance and the tribotechnical properties of chromium steel of the Fe-C-Cr-B system deposited by flux-cored wire with boron carbide alloyed were investigated. It is shown that this steel has high wear resistance. The average values of the mass wear of the deposited metal is 0.0028 g/m, and the linear values are 0.00723 mm/m. The average value of the friction moment was 21.82 N·m, and the coefficient of friction was 0.412. The hardness of such a metal reaches a maximum value of 58 HRC. The microhardness of structural objects for the matrix is 499-603 HV, for hardening phases is 859-924 HV. The metal structure is a martensitic matrix with a large number of reinforcing phases, formed on the basis of type carboboride (Cr, Fe)7(CB)3. It is shown that the mechanism of metal wear is associated with its high hardness due to the dispersed hardening by particles of compounds, which are effective obstacles to dislocation slip under conditions of plastic deformation of the surface during wear and a decrease in the role of the abrasive component of wear.
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