Influence of Modes of Thermoplastic Treatment on the Development of Microplastic Strain in Nitrogen-Bearing Steel Kh21G10N7MBF

The effect of the degree of reduction in cold rolling and subsequent heat holds on the development of microplastic strain in the bending of ribbon specimens fabricated from corrosion-resistant austenitic high-nitrogen steel Kh21G10N7MBF is studied.__________Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 2, pp. 3 – 6, February, 2005.     

Alternating-current electrocontact oxidation of Kh18N10T steel

Properties of surface oxide layers formed on extended Kh18N10T steel specimens upon oxidation at residual pressure P = 10^?4–10¹ mmHg under typical heating in a furnace and alternating-current (50 Hz) electrocontact heating (300°C) are studied. A strong activating effect of alternating-current heating on the oxidation of steel at P = 0.01 mmHg is noticed. Compared to typical heating in a furnace, electrocontact heating promotes saturation of the surface oxide with chromium and homogenization of the chromium distribution in the depth of the oxide and the resulting formation of iron chromite.     

Mechanical properties of types Kh7G28 and Kh7G32 steels

Conclusion In types Kh7G28 and Kh7G32 steels the carbon content must be limited to 0.06% since an increase in it to 0.2% leads to a sharp drop in plasticity at cryogenic temperatures.Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 1, pp. 23–25, January, 1991.     

Effect of chemical composition on the heat resistance of steel Kh25N16G7AR

Conclusion By statistical treatment of data on commercial heats of steel Kh25N16G7AR by the method of multiple correlations we determined the effect of the chemical composition on the heat resistance at 850°C. An increase of the chromium and silicon concentrations, and also a reduction of the manganese, nickel, and phosphorus concentrations, increases the heat resistance of the steel. Within the nominal limits, the concentrations of nitrogen, carbon, and sulfur have a negligible effect on the heat resistance.Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 8, pp. 74–75, August, 1972.