ANALYSIS OF THE DAMAGE OF FUNCTIONAL BASED ON THE COBALT-RESISTANT ABRASION LAYERS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F15%3A86095752" target="_blank" >RIV/61989100:27360/15:86095752 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

ANALYSIS OF THE DAMAGE OF FUNCTIONAL BASED ON THE COBALT-RESISTANT ABRASION LAYERS

Popis výsledku v původním jazyce

Cobalt-based alloys (e.g. Stellite) are often used on surfaces which are required for the high resistance to abrasion (sealing surfaces of the fittings, etc.). These surface layers are commonly applied to low alloyed steel Grade 22 or martensitic steel Grade 91 by welding techniques using. When using armatures with these layers in energetic plants (high pressure valves) have shown operating experience that occurs in damage to functional layers often. The typical damage is characterized by cracking and flaking (release) of the functional layer. This paper deals with the analysis of the causes of such damage to the surface layer of the ball valves (or their contact faces) after the low-cycle service application in superheated steam (550°C / 10MPa). Layers were applied to the steel AISI 316. For this research were used methods of metallography, chemical and SEM analysis, phase and XRDA microanalysis, hardness and microhardness testing. It was found selective cracking in the areas of a specific phase composition. The subsequently release of materials particles and other damage to the surface by these particles.

Název v anglickém jazyce

ANALYSIS OF THE DAMAGE OF FUNCTIONAL BASED ON THE COBALT-RESISTANT ABRASION LAYERS

Popis výsledku anglicky

Cobalt-based alloys (e.g. Stellite) are often used on surfaces which are required for the high resistance to abrasion (sealing surfaces of the fittings, etc.). These surface layers are commonly applied to low alloyed steel Grade 22 or martensitic steel Grade 91 by welding techniques using. When using armatures with these layers in energetic plants (high pressure valves) have shown operating experience that occurs in damage to functional layers often. The typical damage is characterized by cracking and flaking (release) of the functional layer. This paper deals with the analysis of the causes of such damage to the surface layer of the ball valves (or their contact faces) after the low-cycle service application in superheated steam (550°C / 10MPa). Layers were applied to the steel AISI 316. For this research were used methods of metallography, chemical and SEM analysis, phase and XRDA microanalysis, hardness and microhardness testing. It was found selective cracking in the areas of a specific phase composition. The subsequently release of materials particles and other damage to the surface by these particles.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LO1203" target="_blank" >LO1203: Regionální materiálově technologické výzkumné centrum - Program udržitelnosti</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL 2015 : 24th International Conference on Metallurgy and Materials : conference proceedings : June 3rd-5th 2015, Hotel Voroněž I, Brno, Czech Republic, EU

ISBN

978-80-87294-62-8

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

7

Strana od-do

1540-1546

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

3. 6. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000374706100250