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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
Structural-mechanical characteristics of the selected type of low-carbon steel after cold drawing and heat treatment
 Stopka, Maroš ; Molliková, Eva (referee) ; Pacal, Bohumil (advisor)
This bachelor's thesis focuses on changes in the mechanical properties of low-carbon wire that has been cold-drawn and subsequently heat-treated. Mechanical tests, from which the values of elongation, yield strength and tensile strength were measured, were performed on all samples within 24 hours after they were collected. Two different production rates were established on the hot dip galvanizing line to achieve different time intervals of the annealing process. The experiment was performed at all stages of wire diameter reduction, including the input material. This work also includes metallographic analyzes of samples that have been both polished and etched. The most representative samples were selected for analysis. The results show that deformation caused changes in mechanical properties and an increase in strain hardening, which was subsequently removed by heat treatment.
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