Soudage a l'ARC Flashcards

1
Q

Arc Elect =

A

Chaleur + Rayonnement (IR,UV )

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2
Q

Electrode enrobe (constituant)

A

Enrobage + ame metallique

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3
Q

Enrobage

A

Gaz(protection de ZF) , Laitier , Elements alliers

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4
Q

Ame metallique

A

sert a :
conduire le metal
Deposer le metal
Creer l’arc

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5
Q

laitier

A

assure la protection contre l’oxygene
Ralentit le refroidissement

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6
Q

Role de l enrobage

A

1- Role electrique
2- Mecanique
3- Metallurgique

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7
Q

Role electrique de l enrobage

A

facilite l amorcage
isole l electrode

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8
Q

SI I (intensite) elevee –>

A

amorcage facile + V de fusion rapide donc projection abondante

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9
Q

SI I bas –>

A

amorcage difficile + risque de collage + manque de penetration

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10
Q

I =

A

5O*(D electrode - 1)

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11
Q

different type de courant?

A

CC et CA

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12
Q

la differance entre CC et CA

A

Pour le CC on peut choisir la polarite, et le CA produit in Arc de stabilite moindre (instable )

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13
Q

Polarite directe

A

PD —-> P / et L \

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14
Q

Polarite inverse

A

PI —–> P\ et L/

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15
Q

Parametre du procedes

A

operatoire (U,I,V)
Materiaux
Outillage

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16
Q

un exemple de preparation d une piece avant soudure

A

Angle de chanfreinage pour faciliter la penetration

17
Q

Avantages

A

cout
liberte de mvt
utilisation possible dans toutes les positions

18
Q

Inconvenient

A

Al