Metal Fabrication

Question 1

process of refining ores to extract pure metal

Answer 1

smelting

Question 2

chromium and nickel to steel =

Answer 2

corrosion resistant (stainless)

Question 3

most basic,

molten metal poured into form

Answer 3

casting

Question 4

process of fabrication eliminates flaws.

ex. structural steel (wide-flanged beams)

Answer 4

hot rolling

Question 5

process of fabrication increases strength and elastic limit.

ex. thin steel shapes

Answer 5

cold rolling

Question 6

process of fabrication:
pushed thru a die.
many aluminum sections.
(decorative + door/wdw frames)
advantage: @ large quantities,
easy to make custom.

Answer 6

extruding

Question 7

process of fabrication:
sim. extruding, but PULLED thru a die.
all except iron

Answer 7

drawing

Question 8

Mechanical Forming:

rolling machines/presses are used for

Answer 8

bending

Question 9

Mechanical Forming:

successive one-directional bends

Answer 9

brake forming

Question 10

Mechanical Forming:

round shapes on a lathe

Answer 10

spinning

Question 11

Mechanical Forming:

patterns on flat sheets by rollers

Answer 11

embossing

Question 12

these treatements change strength/workability

Answer 12

Thermal Treatments

Question 13

annealing:

Answer 13

reheated and slowly cooled,
so more ductile.

improved machinability,
and cold-forming characteristics.

Question 14

quenching:

Answer 14

heating and rapid cooling,
to strengthen (typ steel).

Question 15

tempering:

Answer 15

heating and cooling,

to improve strength/workability (steel).

Question 16

case hardening:

Answer 16

produces a hard-surface steel,

over relatively soft core.

Question 17

Finishing Process:
alter surface in some way,
simple as result of forming,
to more involved grinding/buffing.

Answer 17

mechanical finishes

Question 18

Finishing Process:
clean + prep for other finish,
or protect + color.

Answer 18

chemical finishes

Question 19

Finishing Process:
applied matl’s for decoration/protection.
clear/opaque.

Answer 19

coatings