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Effetto della zincatura sulla saldatura a punti per attrito con acciaio bifasico
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ISBN10: 6209232906
ISBN13: 9786209232909
Publisher: Edizioni Sapienza
Published: Oct 30 2025
Pages: 64
Weight: 0.22
Height: 0.15 Width: 6.00 Depth: 9.00
Language: Italian
ISBN13: 9786209232909
Publisher: Edizioni Sapienza
Published: Oct 30 2025
Pages: 64
Weight: 0.22
Height: 0.15 Width: 6.00 Depth: 9.00
Language: Italian
La saldatura a punti per attrito (FSSW) è un processo adatto alla saldatura di materiali leggeri e acciai avanzati ad alta resistenza per applicazioni strutturali in configurazione sovrapposta in combinazioni di giunzioni simili e dissimili. Il presente lavoro valuta l'effetto della zincatura sulla FSSW dell'acciaio bifasico. Le saldature sono state eseguite con quattro diverse configurazioni di giunti con tempi di permanenza diversi. Le saldature FSS sono state eseguite anche su lamiere di spessore simile in acciaio DP800 non zincato e acciaio DP800 zincato utilizzando parametri di saldatura fissi, ad esempio profondità di penetrazione dell'utensile, velocità di penetrazione e velocità di rotazione, utilizzando un perno cilindrico con tre superfici piatte equidistanti e una spalla piatta. È stato utilizzato un microscopio ottico leggero per analizzare le caratteristiche microstrutturali dei collegamenti, mentre le prestazioni meccaniche sono state studiate in termini di durezza e prove di trazione e taglio. Sono state stabilite le relazioni tra le prestazioni meccaniche e i parametri di saldatura per i giunti. I risultati preliminari hanno mostrato che l'acciaio nudo DP800 ha ottenuto una resistenza alla trazione leggermente superiore a quella dell'acciaio zincato DP800. È stato suggerito che la resistenza del giunto fosse correlata all'area della zona di agitazione all'interfaccia di saldatura.
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