Cavitation Erosion Mechanisms of Solution Treated X5CrNi18-10 Stainless Steels

2016 ◽  
Vol 138 (3) ◽  
Author(s):  
I. Bordeaşu ◽  
I. Mitelea ◽  
L. Sălcianu ◽  
C. M. Crăciunescu
Keyword(s):  
Grain Size ◽  
Stainless Steels ◽  
Cavitation Erosion ◽  
Erosion Resistance ◽  
Cavitation Resistance ◽  
Technological Parameters ◽  
Chemical Homogeneity ◽  
Solution Treated ◽  
Erosion Mechanisms ◽  
Cavitation Erosion Resistance

The cavitation erosion resistance of an X5CrNi18-10 stainless steel, solution treated at temperatures in the range of 1000–1100 °C for 5–50 mins, was investigated using a piezoceramic vibrating system. The variation of the technological parameters led to changes in the degree of the chemical homogeneity and the grain size of the austenite. Heating at 1050 °C for 25 mins, followed by water quenching, led to an increase in the cavitation erosion resistance of about 2.45 times compared to the samples heated for 50 mins. A significant improvement of the cavitation resistance was obtained for the sample maintained at 1050 °C compared to the samples annealed at 1000 and 1100 °C. It was found that the associated cavitation erosion resistance is improved for finer granulation and for higher degree of chemical homogeneity of the austenite.

scholarly journals Influence of Nitriding and Laser Remelting on Properties of Austenitic Stainless Steel Type X10CrNi18-8 and Cavitation Erosion Resistance

2016 ◽  
Vol 16 (2) ◽  
pp. 21-31
Author(s):  
A. Sitko ◽  
M. Szkodo ◽  
S. Kucharski
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Cavitation Erosion ◽  
Erosion Resistance ◽  
Nitriding Process ◽  
Cavitation Resistance ◽  
Laser Remelting ◽  
Surface Layers ◽  
Steel Type ◽  
Cavitation Erosion Resistance

Abstract The paper presents properties of surface layers. Surface layers were obtained by using low temperature glow–discharge nitriding process and laser remelting carried out on austenitic stainless steel type X10CrNi18-8. Investigations were done by using an Ultra Nanoindentation Tester (UNHT) in the Warsaw Institute of Fundamental Technological Research. The influence of the above mentioned treatments on obtained surface layers is shown. The values of the Vickers hardness (HV), the irreversible indentation work (Wir), the reversible work (We) and the maximum depth (hmax) during indentation were determined using the method proposed by Oliver and Pharr [1]. On the basis of mechanical properties, the elasticity (Ie) and ductility (Iir) indexes were calculated. Moreover, microstructure cross-section of the austenitic stainless steel after nitriding process and laser remelting was observed using a scanning electron microscope. Cavitation test was performed at a vibratory rig with stationary specimen. On the basis of erosion curves the cavitation resistance was evaluated.

The Influence of Cooling Rate from High Temperature upon the Cavitation Erosion Resistance of the Duplex Stainless Steel X2CrNiMoN22-5-3

2015 ◽  
Vol 1111 ◽  
pp. 145-150
Author(s):  
Lavinia Madalina Micu ◽  
Ion Mitelea ◽  
Ilare Bordeaşu ◽  
Corneliu Marius Crăciunescu ◽  
Mihaela Popescu
Keyword(s):  
High Temperature ◽  
Cooling Rate ◽  
Stainless Steels ◽  
Cavitation Erosion ◽  
Erosion Resistance ◽  
Cold Plastic Deformation ◽  
Final Heat Treatment ◽  
Slow Cooling ◽  
Cavitation Behavior ◽  
Cavitation Erosion Resistance

Duplex stainless steels are processed by a process of hot or cold plastic deformation and welding operations. Their properties of the use depend on the type of product (deformed, welded) and to the final heat treatment. The proportion of the basic structural constituents (austenite and ferrite) essentially depends on the chemical composition and cooling rate from high temperatures. This paper shows the that slow cooling in the furnace at the high temperature (1060 ° C) lead to a predominantly austenitic microstructure (cca.75%) while that cooling in the water sudden limited the transformation austenite → ferrite, so that the microstructure will be composed of cca.52% F + 48% A.These modifications by structure justify the changes the occurring with respec ultrasonic erosion cavitation behavior.

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