
TOIM Toplinksa obrada i kaljenje celika
Quiz
•
Engineering
•
9th Grade
•
Practice Problem
•
Hard
Ivica Gizdic
Used 4+ times
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Što se stvara pri brzom hlađenju (kaljenju) kaljivih čelika s određene temperature kaljenja?
Austenit
Martenzit
Ferit
kristalna rešetka
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Koja unutarnje stanje mijenja proces žarenja (temperiranja) nakon kaljenja?
Povećanje tvrdoće
Smanjenje toplinskih napetosti
Otpornosti na koroziju
Smanjenje veličine zrna
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Što obuhvaća postupak poboljšavanja čelika nakon kaljenja?
Kompletno standardno kaljenje
Temperiranje žarenjem napetosti
Žarenje pri višim temperaturama
Nitriranje i cementiranje nakon kaljenja
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Što je primarna svrha površinskog kaljenja?
Poboljšanje žilavosti cijelog predmeta
Tvrda površine i žilava jezgra
Smanjenje unutarnjih napetosti
Povećanje dimenzijske stabilnosti
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pri kojoj se temperaturi obično provodi nitriranje čelika?
Oko 200-300°C
Oko 500°C
Oko 700-800°C
Oko 1000°C
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Koja se tvar koristi kao medij za cementiranje površinskog sloja čelika?
Destilirana voda
Amonijak (NH₃)
Ugljen ili CO
Dušik (N₂)
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Za mjerenje temperatura iznad 600°C preporučuju se:
Živini termometri
Termoelementi Cu-Konstantan
Optički pirometri
Bimetalni termometri
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