Metal Manufacturing Final Flashcards by Brooks Williams

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

Soldering

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Non ferrous metals melted togherther above 540 F

Brazing

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Soldering on Silver alloy metals above 800 f

Hard soldering?silver brazing

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

Riveting

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procces to make sure molten solder will stick

Tinning

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Soldering individual pieces, and then combine and heat them toghether

Sweat Soldeirng.

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

Burnel Hardness tester

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uses diamond indicator. dial gauge indidgates hardness

Rockwell Hardness tester

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

SHore scelerscope

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As Su and Hb go up

elognation goes down

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requires oxygen, fuel, and gas

Oxyfuel welding

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Limitations of Oxyfuel

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

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Uses cyanide for hardening

Liquid hardnenign

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Uses heat to rapidly melt metal

Flame Hardening

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Utlizies high frequency current. Fast proccess

inudction hardneign

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Do not blank on closed container of any kind

Weld

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Reduces Hardness to improve machinability. usuualy done to ferrous metals

Annealing

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metal heated to slightly above normal tempeture. cooled slowly

Normalizing

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

Hardening

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Rapidly cooling after heating. steel remains brittle and hard

Quenching

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

Surface hardenign

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

Laser hardening

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risky over 14 psi

Welding

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advatanges of Oxyfuel welding

low cost, portable, no electricity required

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advantages of oxyfuel cuttign

extrmely protable, low cost, no electricity

welding tanks have this to monitor gas pressure

gauges, regulators

Case hardening

small amounts of nitrogen introduced to the surface.

limitations of stick

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

advantages of stick welding

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

welding hazards

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

welding hazards radiation

Electric arc welding rays can burn eyes and skin.

Stick slage is lighter than

molten metals

Doce polairty

dc, heat concentrated at electrode, lower penetration.

doce reverse polarity

heat concentrated at workpiece, medium to deep penetration

Ac polarity

medium penetration medium travel speed

a power source will try to keep a

constant current

voltage is proportional to

Arc length

Duty cycle

percentage

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

frayed cable

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

Carbon. calcium. manganese

a duty cycle of the welder

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

modes of metal transfer

Short circuitign. Globular, spray

eletricla connections

lugged and twist mate.

advantages of mig (short circuiting)

low cost. all position. handles poor set up

disadvantages of mig(short cicuiting)

Only on thin material

a of mig( globular)

deep penetration. low gas cost.

d of mig(globular)

excessive splatter. flat/horizonatal postion only

a of mig(spray)

smooth weld bead. little ot no splatter

d of mig(spray)

Higher shieldign gas cost. high raidated heat.

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

Dcep reverse polarity

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

Ac polarity

elelctrode positive

reverse polarity

electrode negative

straight polarity

Electrode, tungsten, alloy

EWX

the ball is x the times of the diameter

1 1/2

Argon. helium, argon helium mix are exmaples of

shielding gas

Argon is hotter than hydrogen

tubular wire wiht flux core in it.

FCAW

a of FCAW

outdoor usability. nos helieding gas costs

d of fcaw

smoke and fumes, slag.

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

gmaw

advant of GTAW

hiq quaility wleds. better control over process.

d of GTAW

hard to master. slower than other welding

a of saw

versatile. portbale. can be used outdoors

d of saw

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

two wires - two power sources. lead and trail wire

tandem arc

two wire one power source

tiny twin arc

compact rugges and portatbale. self porblled.

tractor

electrons travel from the workpiece to the electrode.

straight polarity

electrons travel from the electrode to the workpiece

reverse polarity