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BSAeE 3-2 > AMCR METAL WORKING PROCESS > Flashcards

AMCR METAL WORKING PROCESS Flashcards

1
Q

Any process involving controlled heating and cooling to develop certain desirable characteristics

A

Heat Treatment

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2
Q

3 Stage Process of Heat Treatment

A

heat, soak, cool

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3
Q

Above critical temperature that eliminates the stresses

A

Heat

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4
Q

Maintain high temperature for a time period

A

Soak

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5
Q

Fast cooling (quenching), makes the steel hard while slow cooling

A

Cool

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6
Q

It is controlled by the rate of cooling

A

Hardening

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7
Q

Reduces the brittleness and some hardness but it improves ductility

A

Annealing

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8
Q

It relieves internal stresses, it refines grain structure and softens metals

A

Normalizing

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9
Q

Relieves stress due to mechanical working like forging, welding, machining.

A

Case Hardening

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10
Q

3 Processes of Case Hardening

A

Carburizing, Cyaniding, Nitriding

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11
Q

Heating steels in contact with a carbonaceous material

it is also the oldest method

A

Carburizing

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12
Q

Heating steels in contact with a cyanide salt

Fast and cheap

Seldom used in aircraft work

A

Cyaniding

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13
Q

Heating special alloys with ammonia gas or other nitrogenous materials

A

Nitriding

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14
Q

Basic Temper Designation

A

F - As fabricated
H - Strain Hardened
T - Thermally Treated
O - Annealed
W - Solution Heat Treated

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15
Q

Hardness Designation of H1

A

Cold Worked

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16
Q

Hardness Designation of H2

A

Strain Hardened, then partially annealed

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17
Q

Hardness Designation of H3

A

Strain Hardened, then stabilized

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18
Q

Degree of Hardening

A

HX2 - 1/4 hard
HX4 - 1/2 hard
HX6 - 3/4 hard
HX8 - FULL HARD
HX9 - EXTRA HARD

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19
Q

Heat Treatments for non-ferrous metals

A

Natural Aging, Artificial Aging, Annealing

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20
Q

The process that removes effects of cold work; softens

A

Annealing

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21
Q

Metal Working Processes

A

Forming, Cutting, Joining

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22
Q

Formed by physically working the metal into desired shape

A

Wrought

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23
Q

Formed by pouring metal into mold

A

Casting

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24
Q

Forming metal at an elevated temp when it is in its soft state

A

Hot Working

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25
Q

Forming at elevated temp also but it is pressed or hammered

A

Forging

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26
Q

Forming hot metal ingots with roller mills

A

Rolling

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27
Q

Mechanical working performed at a temp below critical range

A

Cold Working

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28
Q

Finishes the hot rolled material, it gives smooth finish and accurate dimensions

A

Cold Rolling

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29
Q

Used in making seamless tubing, wire, tie rods.

A

Cold Drawing

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30
Q

Forcing solid metal through a die which imparts a required cross section to the metal

A

Extrusion

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31
Q

It is a cold working process in which the surface layer of a workpiece is plastically deformed by a hard tool

A

Burnishing

32
Q

A cold work process in which metal is struck by a stream if small hard spheres creating dimples

A

Shot Peening

33
Q

The process of joining two metallic pieces together in a permanent manner. Heat or pressure is applied

A

Welding

34
Q

2 types of welding

A

Fusion, Non Fusion

35
Q

Joining by blending compatible metals; used in small aircrafts

A

Fusion Welding

36
Q

Joining by adhesion of one metal to another; brazing or soldering

A

Non-Fusion Welding

37
Q

General Evaluation of Welds

A

Penetration, Dimension, Free of oxidation, Filler, Welding Technique

38
Q

Poor Welds

A

Cold Weld, Excessive Heat, Adjacent Cracks

39
Q

2 Types of Fusion Welding

A

Gas Welding, Electric Arc Welding

40
Q

Fuel gas such as acetylene or hydrogen is mixed inside a welding torch

A

Gas Welding

41
Q

Heat is produced via movement of electrons

A

Electric Arc Welding

42
Q

Different Types of Flames

A

Neutral, Oxidizing, Carburizing

43
Q

Elements that are used in welding (gasses)

A

Acetylene, Argon, Hydrogen, Helium, Oxygen

44
Q

Parts of a Electric Arc Welding

A

Welding Rod, Electrode, Filler Metal

45
Q

Types of Electrical Arc Welding

A

Shielded Metal Arc Welding, Gas Metal Arc Welding, Gas Tungsten Arc Welding

46
Q

Used in fabricating tools. It works when a metal wire rod coated with flux is clamped in electrode holder, and also the metal piece to the power supply that makes an arc struck between the rod and the metal

A

Shielded Metal Arc Welding

47
Q

Used in large volume production work
No filler and slags deposit

A

Gas Metal Arc Welding

48
Q

Used most in aircraft maintenance. It uses a tungsten electrode.

A

Gas Tungsten Arc Welding

49
Q

2 types of non fusion welding

A

Brazing, Soldering

50
Q

Metal joining process in which the bonding material is a non ferrous metal, it operates at a lower temp than fusion welding.

A

Brazing

51
Q

Performed only in minor repair jobs like joining electrical connections

A

Soldering

52
Q

First Step of Rivet Removal

A

File a flat area on manufactured head

53
Q

Second Step in Rivet Removal

A

Center Punch Flat

54
Q

Third step of Rivet Removal

A

Drill through head using drill one size smaller than rivet shank

55
Q

Fourth step of rivet removal

A

Remove Weakened head with Machine Punch

56
Q

Last step of rivet removal

A

Punch out rivet with machine punch

57
Q

The outside dimensions of a formed part. This is given on the drawing or blueprint or may be obtained from the original part.

A

Base Measurement

58
Q

The longer part of a formed angle.

A

Leg

59
Q

The shorter part of a formed angle—the opposite of leg.

A

Flange

60
Q

Natural grain of the material is formed as the sheet is rolled from molten ingot.

A

Grain Metal

61
Q

It refers to the curved section of metal within the bend (the portion of metal that is curved in bending).

A

Bend Allowance

62
Q

When sheet metal is bent, it forms an arc known as the _______

A

Bend Radius

63
Q

Where the metal starts to bend and the line at which the metal stops curving.

A

Bend Tangent Line

64
Q

An imaginary line that has the same length after bending as it had before bending.

A

Neutral Axis

65
Q

Bend Allowance for 90deg

A

2π(R+1/2T)/4

66
Q

Setback for 90deg

A

R + T

67
Q

Setback for other deg besides 90

A

K(R+T)

68
Q

Formula for K Factor (other than 90deg)

A

K = tan (θ/2)

69
Q

to obtain a smooth bend without flattening the tube.

A

Tube Bending

70
Q

Types of Tube Flaring

A

Single, Double Flare

71
Q

is a mechanical screw device consisting of two threaded terminals and a threaded barrel. These are fitted in the cable assembly for the purpose of making minor adjustments in cable length and for adjusting cable tension.

A

Turnbuckles

72
Q

is the most positive and satisfactory method of safetying capscrews, studs, nuts, bolt heads, and turnbuckle barrels which cannot be safetied by any other practical means.

A

Safety Wiring

73
Q

are used in shear applications and for safetying.

A

Pins

74
Q

Main Types of Pins

A

Taper, Flathead, Cotter

75
Q

These pins are used in joints which carry shear loads and where absence of play is essential.

A

Taper Pins

76
Q

is used in locations where nonmagnetic material is required, or in locations where resistance to corrosion is desired.

A

Cotter Pin

77
Q

is a pressed fit pin with chamfered ends. It is tubular in shape and is slotted the full length of the tube. The pin is inserted with hand tools and is compressed as it is driven into place.

A

Roll Pin

BSAeE 3-2 (32 decks)

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