Opracowanie i weryfikacja cieplno-mechanicznych parametrów kształtowania na gorąco wyprasek ze stopu Ti-6Al-4V

• Autorzy: Wojtaszek M.

Identyfikatory

DOI

10.15199/24.2017.4.8

Warianty tytułu

EN

Design and verification of thermo-mechanical parameters of hot processing of Ti-6Al-4V alloy compacts

• Języki publikacji: PL

Abstrakty

PL

Określono korzystne warunki kucia na gorąco w matrycach otwartych stopu Ti-6Al-4V otrzymanego metodą metalurgii proszków. Materiał wyjściowy do badań wytworzono w procesie prasowania na gorąco mieszaniny proszków elementarnych. Otrzymano półwyrób o wysokiej gęstości względnej, co potwierdzono w badaniach metalograficznych i metodą tomografii komputerowej. Modelowanie numeryczne procesu kucia na gorąco w matrycach otwartych wyprasek prowadzono metodą elementów skończonych. Analizowano różne warianty procesu kształtowania wybranej odkuwki, uwzględniono przy tym ograniczenia występujące w przemyśle. Poprawność warunków kucia, wyznaczonych na drodze modelowania jako korzystne, zweryfikowano, wykonując próby technologiczne na linii przemysłowej. Ocenie poddano stan mikrostruktury i twardość odkuwek. Wykazano, że prowadzona w proponowany sposób technologia, obejmująca wykonanie metodą metalurgii proszków wsadu i jego kształtowanie na gorąco, daje możliwość otrzymania pozbawionych wad odkuwek ze stopu Ti-6Al-4V.

EN

The proposed procedures of elaboration and verification of the parameters of deformation of Ti-6Al-4V alloy compacts after open-die forging process were discussed. As the material under investigation, powder compacts obtained from elemental powders were used. The compacts were nearly free from porosity, which was confirmed by metallographic examination and computed tomography nondestructive tests. The numerical modeling of hot forming of the selected forging was performed based on the finite element method (FEM). Various options of forging conditions were simulated, however the range of parameters was in accordance with possibilities and limitations of the industry. Basing on the results of numerical analysis, appropriate conditions of hot forming in open dies of the selected shape of a forging were determined. The results of modeling were verified in the trials conducted in industrial conditions. The quality of the product was estimated by the microstructure examinations as well as hardness measurements. It was found that forging of a billet, manufactured with proposed powder metallurgy technology, leads to obtaining a defect-free forging of Ti-6Al-4V alloy.

Słowa kluczowe

PL

metalurgia proszków; stopy tytanu; kucie na gorąco; parametry cieplno-mechaniczne; mikrostruktura

EN

powder metallurgy; titanium alloys; hot forging; thermo-mechanical parameters; microstructure

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Hutnik, Wiadomości Hutnicze
• Rocznik: 2017
• Tom: Vol. 84, nr 4
• Strony: 171--177
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Wojtaszek M.

• Akademia Górniczo - Hutnicza im. Stanisława Staszica w Krakowie, Wydział Inżynierii Metali i Informatyki Przemysłowej

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).