Processes of dynamic aging of VT16 titanium alloy

The use of dynamic aging in heat treatment improves the mechanical properties of alloys, first of all, the strength characteristics under conditions of static (both short- and long-term) and cyclic loading and the resistance to brittle and ductile fracture. Therefore, the processes of dynamic aging that can be treated as a variant of thermomechanical treatment have been studied in detail in several works and have been used for strengthening parts made of steels of pearlitic, martensitic, and austenitic classes, beryllium bronze. Duralumin-type alloys, etc. At the same time, data on the effect of dynarrlic aging on the properties of titanium alloys are very scarce. The present article is devoted to this problem.Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 7, pp. 16 – 20, July, 1996.     

Heat treatment of granulated VT22 alloy

A standard regime of heat treatment has been developed for semifinished products of VT22 alloy manufactured by the conventional technology (casting + deformation). However, it gives a comparatively low level of crack resistance in the case of granular technology (hot isostatic pressing + deformation). In this connection it became necessary to refine the regime of heat treatment of the granulated VT22 alloy. The present work concerns the effect of different regimes of heat treatment on the size and shape of segregations of the ct-phase, investigated with the aim of improving the crack resistance characteristics of granulated VT22.     

Isothermal treatment of alloy KhN35VT

Conclusions Isothermal treatment of alloy KhN35VT results in a long-term strength and, particularly, long-term plasticity at 650°C that are higher than after standard heat treatment, and short-term characteristics that are somewhat lower.Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 7, pp. 35–37, July, 1971.     

Special features of heat treatment of sheets for large welded panels of alloy VT20

Welding of preforms of titanium alloys causes deformation and the formation of cold cracks under the action of welding stresses. The residual stresses which appear in other operations in manufacturing structures (forging, mechanical treatment, etc.) in combination with welding stresses cause a still greater warping and deformation leading to failure of the structures. The present paper concerns the processes of relaxation, laws of gas saturation, and changes in the mechanical properties in heat treatment of titanium alloy VT20. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 12, pp. 17–21, December, 1998.     

Influence of heat treatment on the structure and properties of VT1 titanium and the OT4 alloy

Metal Science and Heat Treatment -     

Conversions upon isothermal treatment of the pseudo-beta-titanium alloy VT35

VIAM Scientific-Industrial Association; Verkhne-Saldinsk Metal-Working Production Association. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 3, pp. 22–25, March, 1992.     

Use of vacuum furnaces in heat treatment

Vacuum furnaces with a cylindrical chamber, with a rectangular-cross-section chamber, and special-purpose furnaces produced by SECO/WARWICK are considered. Examples of the use of vacuum furnaces for hardening, tempering, and carburizing are given. Prospects for improvement of the furnaces are considered.