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Heat affected zone in surfacing chromium ledeburitic steelTonkovič-Prijanovič, Marica ; Kosec, LadislavAlat se tijekom rada oštećuje. Većina oštećenja nastaje zbog habanja materiala. Oštećeni alat se popravlja navarivanjem. U ovom radu opisuju se značajne promjene u zoni utjecaja topline (ZUT) alata ... koji je obnovljen navarivanjem TIG postupkom i mikroplazmom. Mikrostrukturu čelika obnovljenog alata analiziralo se pomoću optičkog i scaning elektronskog mikroskopa. Alati su izrađeni iz kromovog ledeburitnog čelika W.N.1.2379, a obnovljeni su navarivanjem čelika W.N.1.4718. Promjene u zoni utjecaja topline povezane su također i s načinom navarivanja, među mikrostrukturnim promjenama specifično je rastapanje karbida, posebno primarnih. Na takav se način u okolini karbida u ZUT povećava koncentracija karbidotvornih elemenata i ugljika toliko, da dolazi do lokalnog taljenja i nastanka t.z. sekundarnog ledeburita.Source: Metalurgija = Metallurgy. - ISSN 0543-5846 (Vol. 49, br. 3, srp.-ruj. 2010, str. 155-160)Type of material - article, component partPublish date - 2010Language - englishCOBISS.SI-ID - 1043295
Author
Tonkovič-Prijanovič, Marica |
Kosec, Ladislav
Topics
repair welding |
heat affected zone |
microstructure |
carbides |
dissolution |
secondary ledeburite
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Database name | Field | Year |
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Tonkovič-Prijanovič, Marica | 08609 |
Kosec, Ladislav | 00050 |
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