Tratamentos térmicos e termoquímicos
Quiz
•
Special Education, Specialty, Other
•
1st Grade - University
•
Hard
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11 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Para refinar uma granulação grosseira, usa-se o seguinte procedimento
raspagem;
normalização;
usinagem;
aquecimento
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
O recozimento pleno consiste em aquecer o aço em temperatura:
abaixo da zona crítica;
no limite da zona crítica;
acima da temperatura ambiente;
acima da zona crítica.
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Para aumentar a dureza e a resistência à tração dos metais ferrosos, usa-se o tratamento térmico de:
fundição;
têmpera;
aquecimento;
resfriamento.
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Para corrigir a excessiva dureza do aço provocada pela têmpera, usa-se o processo de:
martêmpera;
austêmpera;
normalização;
revenimento.
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
O constituinte da têmpera é:
perlita;
cementita;
martensita;
ferrita
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Um aço endurecido por têmpera deve ser resfriado por meio de:
ar;
forno;
água;
cinzas.
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
A cementação é indicada para aços com teor de carbono inferior a:
0,75%;
0,45%;
0,05%
0,25%’.
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