scholarly journals CORROSION RESISTANCE OF REINFORCED LAYERS OF 15Х11МФ STEEL STEAM TURBINE BLADES

2021 ◽  
pp. 136-141
Author(s):  
D.B. Hlushkova ◽  
V.A. Bahrov ◽  
O.D. Hrinchenko ◽  
A.A. Hnatiuk ◽  
N.E. Kalinina ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Steam Turbine ◽  
Ph Value ◽  
Chemical Elements ◽  
Turbine Blades ◽  
Working Environment ◽  
Working Fluid ◽  
Electrospark Alloying ◽  
Steam Turbine Blades

The reliability of the vane apparatus of steam turbines largely determines the operation of the turbine as a whole. The results of scientific research indicate that the surface operation of the blades in the wet-steam flow is caused by a combination of corrosion and drip erosion. The presence of chemical elements and compounds in the working fluid intensifies the process of blade wear. The pH value of the working environment, which can fluctuate significantly during operation, has a significant effect on the wear characteristics. The influence of methods of strengthening the leading edges of steam turbine blades made of steel is analyzed 15H11MF on corrosion resistance. Corrosion tests of blade samples were carried out, the inlet edges of which were strengthened in three ways: high current amplification, electrospark alloying with T15K6 alloy, electrospark alloying with steel 15H11MF. According to the results of the tests, the layer strengthened by hardening by high-frequency currents has the lowest corrosion rate, the layer strengthened by electrospark alloying with T15K6 hard alloy has the highest. The corrosion rate of the layer reinforced by electrospark alloying of steel 15H11MF is 2.1 less than that of the layer reinforced with T15K6 alloy.

scholarly journals Increasing the corrosion resistance of turbine

2021 ◽  
pp. 91
Author(s):  
Diana Hlushkova ◽  
Valeriy Bagrov ◽  
Elena Hrinchenko ◽  
Andrey Stepaniyk ◽  
Anastasiya Hnatiyk ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Ph Value ◽  
Chemical Elements ◽  
Turbine Blades ◽  
Working Environment ◽  
Working Fluid ◽  
Electrospark Alloying ◽  
Steam Turbines ◽  
Wet Steam Flow

The reliability of the vane apparatus of steam turbines largely determines the operation of the turbine as a whole. The results of scientific research indicate that the surface operation of the blades in the wet - steam flow is caused by a combination of corrosion and drip erosion. The presence of chemical elements and compounds in the working fluid intensifies the process of blade wear. The pH value of the working environment, which can fluctuate significantly during operation, has a significant effect on the wear characteristics. The influence of methods of strengthening the leading edges of steam turbine blades made of steel is analyzed 15Х11МФ on corrosion resistance. Corrosion tests of blade samples were carried out, the inlet edges of which were strengthened in three ways: high current amplification, electrospark alloying with T15K6 alloy, electrospark alloying with steel 15Х11МФ According to the results of the tests, the layer strengthened by hardening by high-frequency currents has the lowest corrosion rate, the layer strengthened by electrospark alloying with T15K6 hard alloy has the highest. The corrosion rate of the layer reinforced by electrospark alloying of steel 15H11MF is 2.1 less than that of the layer reinforced with T15K6 alloy.

Effect of electrospark alloying modes on mass transfer kinetics of alloying electrode material on titanium alloys for steam turbine blades

2020 ◽  
pp. 452-456
Author(s):  
V.N. Gadalov ◽  
A.V. Filonovich ◽  
I.V. Vornacheva ◽  
M.A. Muratov
Keyword(s):  
Mass Transfer ◽  
Steam Turbine ◽  
Electrode Material ◽  
Turbine Blades ◽  
Chromium Alloy ◽  
Electrospark Alloying ◽  
Nickel Chromium ◽  
Mass Transfer Kinetics ◽  
Steam Turbine Blades ◽  
Kinetics Of

The technology for hardening of the working edges of steam turbine blades made of titanium pseudo-α-alloys by electrospark alloying is given. The effect of the mass transfer kinetics of nickel-chromium alloy alloying electrode on the characteristics of the resulting coatings is studied.

scholarly journals Corrosion Resistance of Modified Heat-Treated 16Cr-4Ni Steel for Geothermal Steam Turbine Blades

2019 ◽  
Vol 23 (4) ◽  
pp. 213-221
Author(s):  
Li-Bin Niu ◽  
Yang Xiao ◽  
Kunio Shiokawa ◽  
Mitsuo Yamashita ◽  
Yoshihiro Sakai
Keyword(s):  
Corrosion Resistance ◽  
Steam Turbine ◽  
Turbine Blades ◽  
Heat Treated ◽  
Steam Turbine Blades

scholarly journals Development of a new type of automatic magnetic particle inspection wall-climbing robot

2021 ◽  
Vol 13 (9) ◽  
pp. 168781402110473
Author(s):  
Jun Liu ◽  
Hanlin Yu ◽  
Linbo Mei ◽  
Bo Han
Keyword(s):  
Steam Turbine ◽  
Crack Detection ◽  
Magnetic Particle ◽  
Turbine Blades ◽  
Simulation Software ◽  
The Body ◽  
Working Environment ◽  
Climbing Robot ◽  
Magnetic Particle Inspection ◽  
Steam Turbine Blades

In the paper, a permanent magnet adsorption wall-climbing robot using magnetic particle detection technology for crack detection is introduced, which solves the problems of low efficiency of traditional manual detection and long detection time. According to the working environment of the detection system and the detection functions that need to be completed, the body structure of the robot is designed, the overall size of the robot is smaller than the distance between two steam turbine blades, so it can achieve the crack detection function of large steam turbine blades, and the stability and force analysis of the robot are carried out, and the adsorption conditions that meet the conditions of no sliding and overturning are obtained. In the paper, we use the magnetic circuit method to design a miniature excitation device for robotic applications and use the simulation software Ansoft-Maxwell to verify its feasibility. In the final experiment, it can be shown that the robot designed can achieve a series of functions such as magnetic particle inspection and image acquisition. There is a good prospect for the inspection of turbine blades.

FIRTH-VICKERS F.V.520B

Alloy Digest ◽  
1965 ◽  
Vol 14 (3) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Stainless Steels ◽  
Martensitic Stainless Steel ◽  
Turbine Blades ◽  
Heat Treating ◽  
Good Corrosion Resistance ◽  
Temperature Performance ◽  
Temperature Heat ◽  
Steam Turbine Blades ◽  
Temperature Heat Treatment

Abstract F.V.520B is an improved martensitic stainless steel which has good corrosion resistance, weldability, and capacity of being hardened by low temperature heat treatment. It is recommended for steam turbine blades and aircraft components. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness and fatigue. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-166. Producer or source: Firth-Vickers Stainless Steels Ltd.

Diagnostics and monitoring of the operating condition of steam-turbine blades

2007 ◽  
Vol 41 (5) ◽  
pp. 295-301
Author(s):  
A. I. Danilin ◽  
S. I. Adamov ◽  
A. Zh. Chernyavskii ◽  
M. I. Serpokrylov
Keyword(s):  
Steam Turbine ◽  
Turbine Blades ◽  
Operating Condition ◽  
Steam Turbine Blades

Water-droplet erosion behavior of high-velocity oxygen-fuel-sprayed coatings for steam turbine blades

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Dingjun Li ◽  
Peng Jiang ◽  
Fan Sun ◽  
Xiaohu Yuan ◽  
Jianpu Zhang ◽  
...  
Keyword(s):  
Steam Turbine ◽  
Water Droplet ◽  
Erosion Resistance ◽  
Turbine Blades ◽  
Impingement Angle ◽  
Erosion Behavior ◽  
Water Droplet Erosion ◽  
Steam Turbine Blades ◽  
Oxygen Fuel ◽  
Sprayed Coatings

Abstract The water-droplet erosion of low-pressure steam turbine blades under wet steam environments can alter the vibration characteristics of the blade, and lead to its premature failure. Using high-velocity oxygen-fuel (HVOF) sprayed water-droplet erosion resistant coating is beneficial in preventing the erosion failure, while the erosion behavior of such coatings is still not revealed so far. Here, we examined the water-droplet erosion resistance of Cr3C2–25NiCr and WC–10Co–4Cr HVOF sprayed coatings using a pulsed water jet device with different impingement angles. Combined with microscopic characterization, indentation, and adhesion tests, we found that: (1) both of the coatings exhibited a similar three-stage erosion behavior, from the formation of discrete erosion surface cavities and continuous grooves to the broadening and deepening of the groove, (2) the erosion rate accelerates with the increasing impingement angle of the water jet; besides, the impingement angle had a nonlinear effect on the cumulative mass loss, and 30° sample exhibited the smallest mass loss per unit area (3) an improvement in the interfacial adhesion strength, fracture toughness, and hardness of the coating enhanced the water-droplet erosion resistance. These results provide guidance pertaining to the engineering application of water erosion protective coatings on steam turbine blades.

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