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Title:Ugotavljanje poškodb vrvnih prižemk in analiza vzrokov njihovega nastanka
Authors:Bajt, Žiga (Author)
Kuhar, Viljem (Author)
Legat, Andraž (Author)
Bajt Leban, Mirjam (Author)
Gomboc, Janez (Author)
Inštitut za kovinske materiale in tehnologije (Authorship owner)
Files:.pdf Materiali_in_tehnologije_2001_Bajt_et_al._An_assessment_of_the_damage_to_ropeway_clips_and_an_analysis_of_the_source_of_the_damage.pdf (126,46 KB)
MD5: 16A43CD8FEABC641EB6C2E20BCC5C67A
 
URL http://mit.imt.si/Revija/izvodi/mit015/bajt.pdf
 
Language:Slovenian
Work type:Scientific work (r2)
Typology:1.04 - Professional Article
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Vrvna prižemka je nosilni, dinamično obremenjen konstrukcijski element, ki povezuje sedežno obešalo s transportno vrvjo sedežnice. V lanskem letu smo sistematično vizuelno in defektoskopsko pregledali večje število prižemk in ostalih vitalnih konstrukcijskih elementov sedežnic. Osnovni cilj preiskav je bil oceniti njihovo stanje, detektirati obstoječe razpoke in ostale poškodbe, ki bi lahko vodile do nenadnih lomov ter določili obseg teh poškodb. Ultrazvočna metoda s posebej prirejeno površinsko sondo se je pokazala kot najprimernejša in izredno zanesljiva metoda za določanje razpok na prižemkah. Rezultati preiskav so pokazali, da ima material prižemk in nekaterih drugih konstrukcijskih elementov zelo nizko žilavost in grobo zrnato feritno - perlitno mikrostrukturo, ki je posledica neustrezne toplotne obdelave. Konstrukcijski elementi iz materiala s tako strukturo ne zagotavljajo zadostne odpornosti proti krhkemu lomu.
Keywords:žilavost, strojništvo, utrujenostne razpoke, metalurgija, ogljično jeklo, prižemke, ultrazvočna preiskava
Year of publishing:2001
Number of pages:str. 291-295
Numbering:št. 5, Letn. 35
ISSN:1580-2949
UDC:621
ISSN on article:1580-2949
COBISS_ID:633703 New window
NUK URN:URN:SI:UM:DK:1DUTEOL3
Views:499
Downloads:39
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Record is a part of a journal

Title:Materiali in tehnologije
Shortened title:Mater. tehnol.
Publisher:Inštitut za kovinske materiale in tehnologije
ISSN:1580-2949
COBISS.SI-ID:106193664 New window

Secondary language

Language:English
Title:An assessment of the damage to ropeway clips and an analysis of the source of the damage
Abstract:A ropeway clip is an important dynamically loaded construction element that fastens together the hanger bar and the rope. During the last year, we were involved in systematic non-destructive testing of a range of ropeway clips and some other important construction elements. The main goal of the research was to detect the existance of cracks and other types of the damage that can lead to unexpected fracture, and an evaluation of the condition of the ropeway clips. The ultrasound method, accompanied by a specially arranged ultrasound surface beam-probe proved to be the most suitable, precise and reliable method for the cracks detection on the clips. In addition, several laboratory investigations were carried out in order to find causes for the initiation and propagation of cracks in the clips. Results of laboratory examinations revealed that the material of the clips, and also of the other construction elements, had very low toughness and a coarse-grain pearlite-ferritic microstructure, which is a result of improper heat treatment. It was concluded that the construction elements made from material with this kind of structure and mechanical properties would not ensure sufficient resistance to brittle fracture.
Keywords:ropeway clip, ultrasound investigations, toughness, fatigue cracks, carbon steel


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