
otel fonta tratamente termice
Authored by lidia codreanu
Instructional Technology
9th Grade
Used 7+ times

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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Oțelul este un aliaj al fierului cu
aluminiu
nichel
carbon
sulf
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Călirea este un tratament termic, ce constă în încălzirea pieselor urmată de răcirea
rapida in aer
rapidă în apă sau ulei
lentă în aer
lentă în cuptor
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
În urma aplicării tratamentului termic de revenire medie, în masa oțelului se formează compusul numit:
martensita
ferita
troostita de revenire
austensita
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Călirea oțelurilor are ca urmări :
creșterea durității
creșterea plasticității
creșterea elasticității
scăderea tenacității
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Fonta albă, are tot carbonul sub formă de
grafit lamelar
grafit nodular
cementită
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Fonta cu înaltă rezistenţă mecanică are grafitul de formă
lamelară
nodulară
în cuiburi
sferoidală
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Recoacerea este un tratament termic, ce constă în încălzirea pieselor urmată de răcirea
rapidă în apă
rapidă în ulei
lentă în aer sau cuptor
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