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Investigation of the fatigue and short-term mechanical properties of 13% chromium steel and titanium alloys after welding or treatment with high-frequency currents as applied to steam-turbine blades |
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| Authors: | F. G. Gonserovskii V. I. Nikitin V. M. Silevich O. N. Simin |
| Affiliation: | (1) Central Boiler-Turbine Institute Research and Production Association (NPO TsKTI), Atamanskaya ul. 3/6, St. Petersburg, 191167, Russia;(2) Leningrad Metal Works (LMZ), OAO Silovye Mashiny, Sverdlovskaya nab. 18, St. Petersburg, 195009, Russia |
| Abstract: | We present the results of a study on comparing the structural strength of rotor blades made of stainless 13% chromium steels for their design versions in which wear-resistant straps made of cast VZK stellite are soldered or welded on the blade inlet edges. It is shown that treatment of VT6 alloy with high-frequency currents increases the endurance limit of the zone subjected to strengthening and makes the alloy more resistant to erosion. The worn blades of a 48-T4 titanium alloy repaired with the use of welding technologies have operational characteristics at least as good as those of newly manufactured ones. |
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