Thermomechanical Strengthening of Powder Stainless Steel of the Austenitic Class and Wear-Resistant Composites Based upon It

Author： Napara-Volgina S. Maslyuk V.

Publisher： Springer Publishing Company

ISSN： 1068-1302

Source： Powder Metallurgy and Metal Ceramics, Vol.44, Iss.9-10, 2005-09, pp. : 435-440

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Abstract

The effect of thermomechanical strengthening of powder materials of several compositions (steel Kh18N15 without additives, with added carbon, and also with additions of Cr₂C₃, MoS₂ and carbon) during hot forming is established by experiment. This effect is detected by comparing the physicomechanical properties of specimens, prepared by high-temperature thermomechanical treatment, with specimens of a similar composition subjected to complete annealing and hardening after separate heating. The different nature in the dependence of strength properties for steel Kh18N15 without additions and a composite based upon it on shear strain intensity during forming is established. Thermomechanical strengthening of hot-formed single-phase stainless steel is traditional in nature: with an increase in the intensity of shear strain steel strength properties increase, but conversely for a composite they decrease and this is explained by the specific nature of its structure formation during forming.