M6.1 Ferrous Flashcards by Meg Bazeley

Josh is what?

Gay

How well did you know this?

Not at all

Perfectly

Meg is what?

Bitch ass disabled n** with a fit mum

How well did you know this?

Not at all

Perfectly

What is a ferrous metal?

An alloy containing iron

How well did you know this?

Not at all

Perfectly

What are the characteristics of pure iron?

. Little deformation resistance
. Ductile
. Soft
. Dense
. Not corrosive resistant

How well did you know this?

Not at all

Perfectly

What is the density of pure iron?

7.9g/cm^3

How well did you know this?

Not at all

Perfectly

What the ratio of cast iron?

Low strength : weight

How well did you know this?

Not at all

Perfectly

How is steel made?

Pig iron / cast iron re-melted in furnace with carbon added

How well did you know this?

Not at all

Perfectly

What are the problems with steel?

. High density
. Corrosive

How well did you know this?

Not at all

Perfectly

Define strength?

Resistant to deformation

How well did you know this?

Not at all

Perfectly

Define tensile strength

Resistant to stretching

How well did you know this?

Not at all

Perfectly

Define compressive strength

Resistance to being pressed down on

How well did you know this?

Not at all

Perfectly

Define shear strength

Resistance to sliding over each other (e.g shears)

How well did you know this?

Not at all

Perfectly

Define torsional strength

Resistance to twisting

How well did you know this?

Not at all

Perfectly

Define flexural strength

Resistance to bending

How well did you know this?

Not at all

Perfectly

Define fatigue strength

Resistance to repeated loading

How well did you know this?

Not at all

Perfectly

Define impact strength

Resistance to repeated beating

How well did you know this?

Not at all

Perfectly

Define hardness

Ability to resist cutting, penetration or abrasion

How well did you know this?

Not at all

Perfectly

Define malleability

Ability to bend, form, or shape without cracking

How well did you know this?

Not at all

Perfectly

Define ductility

Ability to be drawn into wire, or shape without cracking

How well did you know this?

Not at all

Perfectly

Define brittleness

Tendency to break or shatter under stress

How well did you know this?

Not at all

Perfectly

Define conductivity

Ability to carry electrical or thermal energy

How well did you know this?

Not at all

Perfectly

What is Meg?

Bitch wid fit mumma

How well did you know this?

Not at all

Perfectly

Define thermal expansion

Ability to expand under heat

How well did you know this?

Not at all

Perfectly

Define elasticity

Ability to return to original after stretching or bending

How well did you know this?

Not at all

Perfectly

Define toughness

Ability to resist tearing or breaking when bent or stretched

Define fusibilty

Ability for metal to join by heating or melting

Define density

Mass per unit volume

How do alloy ingredients effect steel

Adding small amounts of other materials can change the properties of steel, these include carbon, sulphur, nickel and chromium

What process does carbon allow steel to undergo

Heat treated

If there’s is a high concentration of carbon what happens to the malleability and weldability?

Decreases

What are the percentages for a steel to be low carbon?

0.1 - 0.3

What are the percentages for a steel to be medium carbon?

0.3 - 0.5

What are the percentages for a steel to be high carbon?

0.5 - 1.05

How does sulphur effect steel when rolled?

Become brittle

What does silicon act as?

A hardener

What does phosphorus raise when adds to steel?

Yield strength

What properties does nickel add when added to steel?

Adds strength and hardness

What does chromium do when added to steel?

Increases strength and hardness

What does molybdenum do when added to steel?

. Reduces grain size . Increases impact strength and elastic limit

What does vanadium do when added to steel?

When with chromium it adds strength, toughness and ductility

What does tungsten do when added to steel?

Increases the Melting Point

What are the characteristics of stainless steel?

. High temperature resistance . Corrosion resistant

What are the 3 grades of alloyed steel?

. Austenitic . Ferritic . Martensitic

Describe the facts you know about Austenitic steel

. Non-heat treatable (can only soften) . 200/300 series . Non-magnetic in annealed phase . Corrosion resistant

Describe the facts you know about Ferritic steel

. Can’t be heat treated (only softened) . Magnetic, ductile . Corrosion resistant . 400 series (409,430) . Hard to weld

Describe the facts you know about Martensitic steel

. 400 series (410,420 . Corrosion resistant . Magnetic . Can be heat treated (hardened)

How many digits are used in the alloy steel classification code?

What do the 4 digits in the steel classification code represent? (In general not the numbers in detail)

The chemical composition of the alloy

In detail what do the digits represent in the classification number of steel?

First digit - material type Second digit - identifies material further Third/fourth digit - carbon content (e.g 30 = 0.30%)

What does SAE stand for?

Society of Automotive Engineers

What occurs in steel heat treatment?

Heating and cooling carbon steel to change its properties whiteout shape/size change

What is steel?

Iron alloyed with carbon

What are the sections of the phase diagram for carbon steel?

. Ferrite . Austenite . Cemenite . Pearlite

What is ferrite?

Pure iron

What is Austenite?

Cubic form of iron

What is Cemenite?

Chemical compound of carbon and iron, very hard

What is Pearlite?

Layered structure of Ferrite and Cemenite

How is steel hardened?

By raising its temperature and giving time to cool

What does heating and cooling do to an alloys grain structure?

Alters microstructure

Describe Austenite (not Austenitic)

Face cantered cubic crystal, when ferrous metal is heated above critical temperature

Describe Ferrite (not ferritic)

Body centred cubic crystal, crystal structure of ferrous metals before heat treatment

Describe Martensite (not martensitic)

Body centred tetragonal crystal, ferrous metals heated above upper temperature and rapidly quenched

What is the critical temp of metals?

Phase at which changes occur during heating or cooling

Who has a 10 incher?

Lewis

Who is secretly a man?

Meghan bazeley

What is quenching?

Heating and rapidly cooling a material

What is annealing and can they be used on aircraft?

. Softens steels and relieves internal stresses ( soak 10^C above critical limit) . Can’t be used on aircraft

What is normalising?

Heating steel to 38^C above upper limit and soaking, then left at room temperature to cool. Any material that’s been welded or forged

What is tempering and what will it do to the material?

Used after quenching as the steel is brittle, decreases hardness and increases ductility. Can only be used for high carbon steel. Low temp process

What can steels temperature be determined with?

Crayons, pellets, paints that melt at certain temp

What is case hardening?

. Used for aircraft components under high pressure . Makes outer layer hard and core stays soft

What is direct hardening?

. Flame induction/hardening process . Surface heated very quickly then cooled very quickly

What is flame hardening?

Heating with fire torch then immediately quenching with jet of water

What is induction hardening?

. Heated by induction coil . Them immediately quenched by water jet

AISI

American iron steel institute

SAE

Steel Automotive engineering

Carbarise and nitsrise do a question