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Title:Dinamična trdnost materiala na prehodu temena vara pri zvarnem spoju na visokotrdnem konstrukcijskem jeklu
Authors:Gliha, Vladimir (Author)
Inštitut za kovinske materiale in tehnologije (Authorship owner)
Files:.pdf Materiali_in_tehnologije_2000_Gliha_Fatigue_strength_of_a_material_at_the_weld_toe_of_the_weld_joint_on_a_high-strength_structural_steel.pdf (200,03 KB)
 
URL http://mit.imt.si/Revija/izvodi/mit005/gliha.pdf
 
Language:Slovenian
Work type:Scientific work (r2)
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract:Pri zelo kakovostnih soležnih zvarih spojin, ki so dinamično obremenjeni, nastanejo razpoke zaradi utrujenosti materiala zmeraj na prehodu temena vara v osnovi material, torej v TVP (toplotno vplivano področje) tik ob črti taljenja. Eksperimentalno delo je bilo opravljeno na vzorcih materiala TVP, ki so bili pripravljeni s simulacijo termičnih razmer pri varjenju. Primerjali smo trajno dinamično trdnost materiala TVP v razamerah koncentriranih napetosti in hitrost ohlajanja pri varjenju varka, ki material najbolj segreje, ter zadnjega vplivnega varka. Trajno dinamično trdnost materiala na prehodu je mogoče oceniti na osnovi njegove trdote. Pri dvovarkovnih TVP sta trajna in statična trdnost odvisni od zadnjega termičnega vpliva, ki material na prehodu segreje na temperaaturo ▫$Ac_3$▫. To je mogoče uporabiti za izboljšanje dinamične nosilnosti zvarnih spojev, ki so varjeni produktivno.
Keywords:varjenje, soležni zvarni spoj, prehod temena vara, razpoke, utrujenost materiala, ddinamična nosilnost, hitrost ohlajanja, prekristalizacija, produktivno varjenje
Year of publishing:2000
Number of pages:str. 231-237
Numbering:št. 5, Letn. 34
ISSN:1580-2949
UDC:621.791.05:669.14.018.295:620.178.3
ISSN on article:1580-2949
COBISS_ID:235178 Link is opened in a new window
NUK URN:URN:SI:UM:DK:YHJ54E9W
Views:777
Downloads:68
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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:Fatigue strength of a material at the weld toe of the weld joint on a high-strength structural steel
Abstract:With high-quality butt-welded joints that are dynamically loaded, cracks caused by material fatigue originate at the toe of weld that is in the HAZ (heat affected zone) adjacent to the fusion line. The experimental work was carried out on samples from the HAZ material prepared by simulation of thermal conditions during welding. The endurance limit in the concentrated stress state was correlated with the cooling time of the thermally most intensive weld pass and the last one that affects microstructure. The weld-joint load-carrying capacity can be assesed by the use of hardness data. In the case of a double-cycle HAZ, the endurance limiti and the static strength depend on the last thermal influence that reheats the material at the toe above the ▫$Ac_3$▫ temperature. This can be successfully used for welded-joint load-carrying-capacity improvemen in production.
Keywords:welding, butt-welded joint, fatigue crack, dynamic load-carrying capacity, cooling rate, recrystallization, productive welding


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