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Optimiranje pogojev žarjenja v novih zvonastih pečeh = The optimisation of annealing in new batch furnacesKofol, Anamarija ...Zaradi povečanja produktivnosti in izboljšanja kakovosti žarjene pločevine je bila v Acroniju v letu 2004/2005 izpeljana investicija v žarilne zvonaste peči. V zvonastih pečeh poteka mehko, ... rekristalizacijsko in sferoidizacijsko žarjenje. Razlika med novimi in starimi pečmi je v zaščitni atmosferi žarjenja. Žarjenje v starih pečeh je potekalo pri 95 % N2 in 5 % H2, v novih pečeh pa pri 100 % H2. Prednosti žarjenja pri 100 % H2 so: krajši časi žarjenja, izboljšanje kvalitete (čista površina, minimalno obarvanje trakov, zmanjšanje možnosti pregretja, enakomerne mehanske lastnosti in mikrostrukturapo dolžini kolobarja), zmanjšanje števila baz, manjša poraba energentov. Izvedli smo meritev temperaturnega profila žarilnega ciklusa v starih in novih zvonastih pečeh na štirih 16-tonskih kolobarjih in naredili primerjavo: v starih pečeh notranji ovoji niso dosegli minimalnih zahtevanihtemperatur, medtem ko so zunanji ovoji presegli nastavljene temperature; v novih pečeh so vsi kolobarji (notranji, srednji in zunanji ovoji) presegli minimalno zahtevano temperaturo 660 °C in niso presegli nastavljenih temperatur. Ocena uspešnosti žarjenja na podlagi doseženih elektromagnetnih lastnosti žarjenih kolobarjev elektropločevin v novih pečeh: izgube pri 1,0 T in 1,5 T so pri vseh vrstah elektropločevin nižje kot v starih pečeh; indukcija je približno enaka; mehanske lastnosti so v povprečju višje pri kolobarjih, žarjenih v novih pečeh. Optimiranje postopkovžarjenj še poteka.Source: Program in knjiga povzetkov = Program and book of abstracts (str. 104)Type of material - conference contributionPublish date - 2005Language - slovenian, englishCOBISS.SI-ID - 465322
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Kofol, Anamarija | ![]() |
Marinšek, Filip, metalurg, 1944- | 03805 |
Čop, A. | ![]() |
Hartman, V. | ![]() |
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