Benefits and properties of laser-hardened tool steel surfaces

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25797000%3A_____%2F19%3AN0000041" target="_blank" >RIV/25797000:_____/19:N0000041 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21340/19:00335810

Výsledek na webu

<a href="http://www.svum.cz" target="_blank" >http://www.svum.cz</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Benefits and properties of laser-hardened tool steel surfaces

Popis výsledku v původním jazyce

Laser hardening brings a great increase in part life and it is an industry-proven process, typically used for hardening of molds, gears, shafts etc. It was mainly the recent advancement of diode lasers that turned it into a competitive process. The paper describes the nature of residual stresses, the influence on hardness and fatigue properties of such parts. Investigations have to be performed in order to gain a comprehensive knowledge about effects on microstructure, hardness, surface properties of treated materials, but also mechanical an particularly fatigue properties. Concerning fatigue resistance of material treated with this technology, results and knowledge recently published in the literature indicate that fatigue resistance can be either reduced or increased, even considerably, depending on numerous parameters of basic material, laser hardening parameters etc. This contribution contains results of a partial study of effect of laser hardening of relatively small specimens on fatigue resistance of 42CrMo4 steel. Two different parameters of the treatment were used, namely two speeds of laser beam on the material surface at constant beam energy. Unlike the lower speed, when fatigue resistance was slightly reduced, higher speed of laser beam resulted in a slight increase of fatigue resistance and fatigue limit. The results are discussed considering an occurrence of residuals stresses.

Název v anglickém jazyce

Benefits and properties of laser-hardened tool steel surfaces

Popis výsledku anglicky

Laser hardening brings a great increase in part life and it is an industry-proven process, typically used for hardening of molds, gears, shafts etc. It was mainly the recent advancement of diode lasers that turned it into a competitive process. The paper describes the nature of residual stresses, the influence on hardness and fatigue properties of such parts. Investigations have to be performed in order to gain a comprehensive knowledge about effects on microstructure, hardness, surface properties of treated materials, but also mechanical an particularly fatigue properties. Concerning fatigue resistance of material treated with this technology, results and knowledge recently published in the literature indicate that fatigue resistance can be either reduced or increased, even considerably, depending on numerous parameters of basic material, laser hardening parameters etc. This contribution contains results of a partial study of effect of laser hardening of relatively small specimens on fatigue resistance of 42CrMo4 steel. Two different parameters of the treatment were used, namely two speeds of laser beam on the material surface at constant beam energy. Unlike the lower speed, when fatigue resistance was slightly reduced, higher speed of laser beam resulted in a slight increase of fatigue resistance and fatigue limit. The results are discussed considering an occurrence of residuals stresses.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

METALLURGIA ITALIANA

ISSN

0026-0843

e-ISSN

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Svazek periodika

111

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

4

Strana od-do

55-58

Kód UT WoS článku

000504449100008

EID výsledku v databázi Scopus

2-s2.0-85074993584