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Metal Manufacturing > Metal Manufacturing Final > Flashcards

Metal Manufacturing Final Flashcards

1
Q

Procces where items are metled toghether usually below 540 F. for non ferrous metals

A

Soldering

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2
Q

Non ferrous metals melted togherther above 540 F

A

Brazing

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3
Q

Soldering on Silver alloy metals above 800 f

A

Hard soldering?silver brazing

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4
Q

Permanent Mechanical Fastener with a Head And Tail side. Has Buck tail

A

Riveting

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5
Q

procces to make sure molten solder will stick

A

Tinning

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6
Q

Soldering individual pieces, and then combine and heat them toghether

A

Sweat Soldeirng.

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7
Q

ultizises a metal ball where diameter of indention is read. the narrower the more hardness

A

Burnel Hardness tester

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8
Q

uses diamond indicator. dial gauge indidgates hardness

A

Rockwell Hardness tester

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9
Q

drops a hammer with diamond shore throgh glass tube. heat of rebound indicates hardness.

A

SHore scelerscope

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10
Q

As Su and Hb go up

A

elognation goes down

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11
Q

requires oxygen, fuel, and gas

A

Oxyfuel welding

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12
Q

Limitations of Oxyfuel

A

Primarrly ferrous material. there are fire hazards mus topeate under “hot

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13
Q

Uses cyanide for hardening

A

Liquid hardnenign

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14
Q

Uses heat to rapidly melt metal

A

Flame Hardening

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15
Q

Utlizies high frequency current. Fast proccess

A

inudction hardneign

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16
Q

Do not blank on closed container of any kind

A

Weld

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17
Q

Reduces Hardness to improve machinability. usuualy done to ferrous metals

A

Annealing

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18
Q

metal heated to slightly above normal tempeture. cooled slowly

A

Normalizing

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19
Q

Part is heated to a predetemined tempetaure fllowe dby controlled cooling.

A

Hardening

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20
Q

Rapidly cooling after heating. steel remains brittle and hard

A

Quenching

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21
Q

The surface of steel is hardening without affecitng internal structure of the metal

A

Surface hardenign

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22
Q

rapid heating, rapid cooling. almost no heat transmitted to interior of part.

A

Laser hardening

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23
Q

risky over 14 psi

A

Welding

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24
Q

advatanges of Oxyfuel welding

A

low cost, portable, no electricity required

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25
Q

advantages of oxyfuel cuttign

A

extrmely protable, low cost, no electricity

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26
Q

welding tanks have this to monitor gas pressure

A

gauges, regulators

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27
Q

Case hardening

A

small amounts of nitrogen introduced to the surface.

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28
Q

limitations of stick

A

low effiecency, operating factor, skilled operator, slag, spatter

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29
Q

advantages of stick welding

A

portable, all postion welidng, can be used outside, low startup cost.

30
Q

welding hazards

A

fume gass, use ventialtion to keep air breathing zone cleaner.

31
Q

welding hazards radiation

A

Electric arc welding rays can burn eyes and skin.

32
Q

Stick slage is lighter than

A

molten metals

33
Q

Doce polairty

A

dc, heat concentrated at electrode, lower penetration.

34
Q

doce reverse polarity

A

heat concentrated at workpiece, medium to deep penetration

35
Q

Ac polarity

A

medium penetration medium travel speed

36
Q

a power source will try to keep a

A

constant current

37
Q

voltage is proportional to

A

Arc length

38
Q

Duty cycle

A

percentage

39
Q

reduces the current carrying capacity of work and will lead to an eratic arc

A

frayed cable

40
Q

ectorode coating types. increases hardeness and strenght. provide shielding and form slag. Deoxides and increase slag.

A

Carbon. calcium. manganese

41
Q

a duty cycle of the welder

A

time in a 10-minute period that a welder can safely maintain the current.

42
Q

modes of metal transfer

A

Short circuitign. Globular, spray

43
Q

eletricla connections

A

lugged and twist mate.

44
Q

advantages of mig (short circuiting)

A

low cost. all position. handles poor set up

45
Q

disadvantages of mig(short cicuiting)

A

Only on thin material

46
Q

a of mig( globular)

A

deep penetration. low gas cost.

47
Q

d of mig(globular)

A

excessive splatter. flat/horizonatal postion only

48
Q

a of mig(spray)

A

smooth weld bead. little ot no splatter

49
Q

d of mig(spray)

A

Higher shieldign gas cost. high raidated heat.

50
Q

Heat concentrated at electrode, shallow pnetration. elcetron go towards it.

A

Dcep reverse polarity

51
Q

50 % heat at plate 50% heat at electrode . medium penetatrion

A

Ac polarity

52
Q

elelctrode positive

A

reverse polarity

53
Q

electrode negative

A

straight polarity

54
Q

Electrode, tungsten, alloy

55
Q

the ball is x the times of the diameter

56
Q

Argon. helium, argon helium mix are exmaples of

A

shielding gas

57
Q

Argon is hotter than hydrogen

58
Q

tubular wire wiht flux core in it.

59
Q

a of FCAW

A

outdoor usability. nos helieding gas costs

60
Q

d of fcaw

A

smoke and fumes, slag.

61
Q

uses endless wire where a shieleing gas within the welding gun protects the welding zone from environment.

62
Q

advant of GTAW

A

hiq quaility wleds. better control over process.

63
Q

d of GTAW

A

hard to master. slower than other welding

64
Q

a of saw

A

versatile. portbale. can be used outdoors

65
Q

d of saw

A

high opertor skill. not pootrbale. requires alot of housekeeping.

66
Q

two wires - two power sources. lead and trail wire

A

tandem arc

67
Q

two wire one power source

A

tiny twin arc

68
Q

compact rugges and portatbale. self porblled.

69
Q

electrons travel from the workpiece to the electrode.

A

straight polarity

70
Q

electrons travel from the electrode to the workpiece

A

reverse polarity

Metal Manufacturing (2 decks)

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