Resistência à erosão por cavitação de aços inoxidáveis austeníticos CrMnSiN depositados por PTA

Ribeiro, Hélio Ormeu; Buschinelli, Augusto José de Almeida; Dutra, Jair Carlos; ́Oliveira, Ana Sofia Clímaco Monteiro D

doi:10.1590/s0104-92242010000200006

Cited by 11 publications

(8 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The cavitation resistance of a material is frequently characterized by the incubation period and maximum erosion rate 7,[9][10][11][12][13] . Another less subjective parameter used to measure the initial period of cavitation and required in technical reports by ASTM G32-10, is the nominal incubation time (determined by the interception between the cavitation time axis and the extension of the maximum erosion rate line fitting, B in Figure 1a and 1b).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Cold Work on Cavitation Resistance of an Austenitic Stainless Steel Coating

2016

View full text Add to dashboard Cite

Machining procedures of welding deposits are usual and result on cold work hardened surfaces. The cold work effect on cavitation erosion of an austenitic stainless steel surface is assessed. FeCrMnSiB coatings were processed by PTA on AISI 304 plates. Specimens were grouped as the cold work deformed surface (CWHS) and the undeformed polished surface (UPS) specimens. Top surface and transverse section of coatings were analysed for slip lines and hardness changes by light microscopy and Vickers microhardness measurements. Ultrasonic cavitation tests were conducted in accordance to ASTM G32-10. CWHS specimens exhibited slip lines and hardened surfaces while UPS specimens did not show traces of slip lines and had insignificant changes on microhardness. Cold work prior to cavitation indirectly increased the nominal incubation time and reduced the maximum erosion rate. Cold work increases the duration of the acceleration period postponing the onset of the maximum erosion rate and enhancing cavitation resistance.

show abstract

Section: Introductionmentioning

confidence: 99%

“…These alloys accommodate the impact of shock waves creating stacking faults and extending the incubation period [8][9][10]14,15 . In other metallic alloys, strain hardening during cavitation also plays an important role as a mechanism partially responsible for the magnitude of the incubation period 16 .…”

Section: Introductionmentioning

confidence: 99%

Effect of Cold Work on Cavitation Resistance of an Austenitic Stainless Steel Coating

2016

View full text Add to dashboard Cite

show abstract

“…The specimen obtained approximately 80% less mass loss than the 30% R CW one. This area may be the result of the alloying elements interaction from the addition wire (Cr, Co, Mo) which, in certain concentrations, facilitates the c-Co phases transformation to martensite, thus improving the metallurgical properties [6,29]. The behavior of the accumulated mass loss in relation to time can be visualized in Fig.…”

Section: Coating Evaluation For Cavitation Erosionmentioning

confidence: 99%

Influence of a cobalt-based wire injection in austenitic coating deposited via CW-GMAW

Cabral

Dias

Filho

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

The control of cavitation erosion wear is a hindrance concerning the maintenance of hydraulic equipment's. The most used consumables to fill eroded areas are cobalt-based austenitic steels, commercially known as ''Stellites''. The current study carried out analysis of the coatings deposited via the new cold wire gas metal arc welding (CW-GMAW) process. The coatings were deposited via CW-GMAW process, variating three levels of addition wire feeding speed. The coating consisted in a three-layer deposit; the first two with an AWS ER 309L wire, via GMAW process, and the third layer employed the interaction between AWS ER 309L and Stellite 21 E wires, via CW-GMAW process. The coatings obtained an increase in cobalt values, with silicon and molybdenum variations, as well as the iron value reduction for each used feeding variation. The coatings were subjected to an accelerated erosion test, according to ASTM G32 Standards. The best obtained result corresponded to the coating with 7.2 m/min additional speed.

show abstract

“…Depositing a mixture of elemental powders, but with no addition, Ribeiro et al [16] presented the FeMnCrSi alloys cavitation resistance higher than other alloys normally applied by the welding process on hydraulic runners. The studied FeMnCrSi alloy had an erosion rate of 1.0 mg•h -1 , while E309L had 16.1 mg•h -1 , Stellite 21 1.4 mg•h -1 , and 15.0 mg•h -1 for the CA6NM.…”

Section: Figure 8: Scanning Electron Microscopy Image Of Femncrsimentioning

confidence: 99%

“…This implosion generates micro-jets, which reach the material with energy enough to erode the hydraulic component by a fatigue mechanism [12][13]. To improve the runners' cavitation resistance, coatings have been applied by welding process on the runners' areas susceptible to cavitation, depositing materials resistant to cavitation, highlighting the cobalt stainless steels filler metal [8,13], which is widely applied by GMAW (Gas Metal Arc Welding) [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Thermal Spraying of FeMnCrSi Alloys: An Overview

Váz

Pukasiewicz

Siqueira

et al. 2021

Thermal Spray 2021: Proceedings From the International Thermal Spray Conference

View full text Add to dashboard Cite

FeMnCrSi alloys have been developed and studied over the past several years with an emphasis on their use as coatings on CA6NM stainless steel hydroturbine components. Much of the work conducted has focused on the optimization of cavitation resistance through chemical composition changes, the use of different thermal spraying (ASP, HVOF, HVAF) and welding (PTA) processes, and post-treatments such as shot-peening, cold working, and PTA remelting. The aim of this current work is to present a compilation of published articles that report on the research that has been done. Among the trends observed is that coating density and cavitation resistance improve with increasing particle velocity, particularly for HVOF-kerosene spraying. In regard to post-treatments, cold working was found to most effective, reducing cavitation mass loss (in PTA FeMnCrSi coatings) by a factor of nearly two.

show abstract

Resistência à erosão por cavitação de aços inoxidáveis austeníticos CrMnSiN depositados por PTA

Abstract: Resumo (0,03%C; 0,35% N;13,2%Cr;11,8% Mn;2,8%Si; bal (0,03%C; 0,35% N;13,2%Cr;11,8% Mn;2,8%Si; bal %Fe) showed a cavitation erosion resistance quite near the most resistant commercial alloys.

Cited by 11 publications

References 3 publications

Effect of Cold Work on Cavitation Resistance of an Austenitic Stainless Steel Coating

Effect of Cold Work on Cavitation Resistance of an Austenitic Stainless Steel Coating

Influence of a cobalt-based wire injection in austenitic coating deposited via CW-GMAW

Thermal Spraying of FeMnCrSi Alloys: An Overview

Contact Info

Product

Resources

About