Metallurgy

Question 1

Pig iron furnace

Answer 1

Continuous

Question 2

What is limestone used for

Answer 2

A flux

Question 3

Pig iron furnace temp

Answer 3

1000 f (537) c

Question 4

Convert coal into…

Answer 4

Coke
Baked for 18 hrs@ 1150 c

Question 5

Heat treating process diagram

Answer 5

Question 6

Cupola furnace

Answer 6

Used to make cast iron

Question 7

Basic heat treating processes for steal are

Answer 7

1: hardening
2: tempering
3: annealing
4: normalizing

Question 8

Hematite

Answer 8

Contains 70% iron
Verieis to black to brick red

Question 9

Limonite

Answer 9

:Similar to hematite

:Contains water

:Brownish

:When water is removed it resembles hematite

Question 10

Taconite

Answer 10

:low grade
:Contains 25-30% iron
: must be specially treated

Question 11

Magnetite

Answer 11

:Rich black
: has the highest iron content
:not found in large quantities

Question 12

Spark mild steel

Answer 12

Bright Long yellow spark stream

Question 13

Spark test high carbon

Answer 13

Dark yellow burst and branch
Follows around wheel

Question 14

Spark test stainless

Answer 14

Forked burst straw color moderate burst

Question 15

Spark test nickel

Answer 15

Vary small orange

Question 16

Spark test cast

Answer 16

Curved white many bursts

Question 17

Martensitic stainless

Answer 17

Can be hardend
No nickel
Chromium

Question 18

Ferritic stainless

Answer 18

Chromium
No nickel
Cutlery

Question 19

Austenitic stainless

Answer 19

Chromium and nickel
Most common

Question 20

Tensile strength

Answer 20

Ability of metal to pull without breaking

Question 21

Make up of brass

Answer 21

Copper and zink

Question 22

Toughness

Answer 22

The ability to resist impact

Question 23

Ductility

Answer 23

Ability to be stretched without breaking ( TO BE DRAWN)

Question 24

Identify by weight carbon steel

Answer 24

490

Question 25

Identify by weight aluminum

Answer 25

160

Question 26

Hardness

Answer 26

Resit penatrtion

Question 27

Machiablity

Answer 27

Measures ease with which you can cut and shape.

Question 28

Alloy steel types

Answer 28

:High strength low alloy
:Qt quench and temper structural steel high strength low alloy corrosion resistant
:maragering steel high nickel cobalt and molybdenum

Question 29

Tool steel

Answer 29

High quality

Question 30

Structure of soft steels

Answer 30

Pearlite consists of ferrite and cemetite

Question 31

Structure of hardened steel

Answer 31

Martensite

Question 32

Austintite formed..

Answer 32

When pearlite heated red hot only exists at high temp when cols go’s back to pearlite or martensite

Question 33

Carbon content .65 to .80 hardning temp

Answer 33

1450 to 1550

Question 34

Carbon content .80 to .95 hardening temp

Answer 34

1410 to 1460

Question 35

Carbon content. .95 to 1.10 hardening temp

Answer 35

1390 to 1430

Question 36

Carbon content 1.10 and over hardening temp

Answer 36

1380 to 1430

Question 37

Full annealing is

Answer 37

Opposite of hardening converts martensite to pearlite

Question 38

Full annealed by heating

Answer 38

Above upper critical temp for seels lessthan .85 carbon and above lower critical temp if have more than .85 carbon