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Nastanek poškodb pri hladnem preoblikovanju jeklene pločevine : diplomsko delo
ID Logar, MIha (Author), ID Bizjak, Milan (Mentor) More about this mentor... This link opens in a new window

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Abstract
V okviru diplomskega dela smo obravnavali problematiko nastanka poškodb pri hladnem preoblikovanju jeklene pločevine. Ker je pri teh postopkih stopnja deformacije lahko zelo visoka, se lahko na izdelkih pojavijo napake in poškodbe. V analizo smo vzeli šest trakov jeklene pločevine različnih šarž ter analizirali in naredili pregled s področja napak pri preoblikovanju nerjavne pločevine, z namenom iskanja razlogov za nastanek napak, ki se pojavljajo med preoblikovanjem določene šarže. Za nastanek napak v jeklu je možnih veliko razlogov, ki so povezani z orodjem, materialom ali vodenjem postopka preoblikovanja (npr. prevelika stopnja deformacije). Ker so se napake pojavile le na določenih trakovih, pri uporabi enakega orodja in deformacije, smo se v okviru diplomskega dela osredotočili na karakterizacijo jeklenih pločevin. Z analizo smo podrobneje karakterizirali vse lastnosti jekla, ki pomembno vplivajo na napovedovanje poteka preoblikovanja kot so mehanske lastnosti, kemijska sestava in mikrostruktura.

Language:Slovenian
Keywords:nastanek poškodb, globoki vlek, anizotropija, mehanske lastnosti, karakterizacija jekel
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:NTF - Faculty of Natural Sciences and Engineering
Place of publishing:Ljubljana
Publisher:M. Logar
Year:2023
Number of pages:XIII, 56 f.
PID:20.500.12556/RUL-146806 This link opens in a new window
UDC:669
COBISS.SI-ID:160028419 This link opens in a new window
Publication date in RUL:14.06.2023
Views:715
Downloads:41
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Secondary language

Language:English
Title:Damage development during cold forming of sheet forming : diploma work
Abstract:
The paper dealt with the problem of damage formation during cold forming of steel sheets. Since the deformation rate in these processes can be very high, defects and damage to the products can occur. Six steel sheet strips from different batches were examined and a survey of the range of defects in stainless steel sheet forming was made to determine the causes of the defects occurring in the forming of a particular batch. There are many possible reasons for the occurrence of defects in steel related to the tool, the material or the control of the forming process (e.g. too high strain rate). Since the defects occurred only on specific strips with the same tool and deformation, the focus of the work was on characterising the steels. The analysis was used to characterise in detail all the properties of the steel that have a significant influence on the prediction of the forming process, such as the mechanical properties, the chemical composition and the microstructure.

Keywords:forming damage, deep drawing, anisotropy, mechanical properties, characterization of steels

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