Mettalurgy Exam 1

Question 1

Three most important Gases

Answer 1

Nitrogen, Hydrogen, Oxygen

Question 2

What is a Slip band. what will happen if subjected to multiple slip bands

Answer 2

When a group of atoms slide past one another on slip lines in the crystal structure.
multiple slip bands cause plastic deformation/ cause plastic deformation

Question 3

Why is an exenstometer used in Tensile Testing

Answer 3

to test for elongation.

Question 4

What is a crystal Stucture

Answer 4

The arragement/formation of atoms, ions, or molecules forming in grains that make up metals

Question 5

A proccess used to extracted ores to for post processing.

Answer 5

Cruhsing

Question 6

Heating up ores to remove impurities using coal or coke to get them to a pure state. Purfiaction method

Answer 6

Smelting. (Purification of ores into metals)

Question 7

What is destructive DIstalltion

Answer 7

A procces where a material ( usually coal) is heated with limited oxgygne to remove impurities. used to produce coke

Question 8

How does carbon contne t affect steel

Answer 8

lower more ductility less hard more easy to machine and weld.

Question 9

Different types of Stainless steel

Answer 9

Ferritic( east maount of cabron moslty iron). Austenititic ( high chromium so high corrosion resistance. Martensitic.

Question 10

why is mid carbon steel hard to weld

Answer 10

Due to the hydrogen content causing cracks in the weld. use low hydrogen fillers

Question 11

Why is high carbon steel hard to weld

Answer 11

Also due to large maounts of cracks appearing. use pre heating procces

Question 12

what percentage C is low carbon steel?

Answer 12

0.05 %-0.35 %

Question 13

What is Distillation

Answer 13

A purification process where metals are heated just above their boiling point to turn the pure part into vapors and leave the impurities behind. the metals are then condensed and leave the impurities behind.

Question 14

Electrolytic Refining.

Answer 14

Define a technique used for the purification of metals with the process of Electrolysis. A purification process where two metal rods or electrodes are placed into a bath of an electrolyte and purified using Electrolysis. Two rays/rods one cathode one anode. both submerged in a bath containing impure salts. the cations gains electrons while the anion loses eclectrons. anode oxidation cathode reduction

Question 15

Zone Refining

Answer 15

A process where a crystal is purified by heating and moving through a rod. The heated part or “molten zone” moves through a long rod. the impurities move through the rod, while the pure metal remains at the start of the rod.

Question 16

medium carbon steel c content

Answer 16

0.35 %- 0.50%

Question 17

High carbon steel c content

Answer 17

0.35 %- 0.50%

Question 18

Taconite

Answer 18

a form of low-grade iron ore. formed into pellets to be used in smelting.

Question 19

Direct reduced iron

Answer 19

iron formed by the reduction( losing oxygen) by methane gas in an Electrical Arc Furnace. breaks down the reduction process.

Question 20

Liquation

Answer 20

Where metals are heated up on top of a furnace separating the impurities and pure metals. the pure metal slides down a slope and then the pure metal is poured into a mold.

Question 21

Distalllation

Answer 21

The process where metals are heated just above their boiling points and turned into metal vapor for purification.