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M6 > M6.1 Ferrous > Flashcards

M6.1 Ferrous Flashcards

1
Q

What is a ferrous metal?

A

Alloy containing iron

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2
Q

What is steels density?

A

High

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3
Q

How is steel made less dense?

A

Alloying elements added to change characteristics

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4
Q

What does carbon allow steel to be?

A

Heat treated

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5
Q

In steel if carbon is high what is there a decrease in?

A

Malleability, weldability

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6
Q

What does sulphur cause steel to be?

A

Brittle

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7
Q

What does silicon cause steel to be?

A

Hardened

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8
Q

What does nickel add to steel?

A

Strength/hardness

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9
Q

What is stainless steel resistant to?

A

Corrosion, high temps

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10
Q

What are the 3 stainless steel grades? (AFM)

A

Austenitic, ferritic, martensitic

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11
Q

Can martensitic stainless steel be heat treated?

A

Yes

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12
Q

SAE means?

A

Society of automotive engineering

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13
Q

When identifying steels what does the first digit mean and the last 2 digits?

A

First digit = material type
Last 2 = carbon %

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14
Q

What does heating and cooling do to steel?

A

Changes it’s properties without changing shape or size

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15
Q

What is austenite? (FCCC)

A

Face centred cubic crystal

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16
Q

What is ferrite? (BCCC)

A

Body centred cubic crystal

17
Q

What is martensite? (BCTC)

A

Body centred tetragonal crystal

18
Q

What is critical temp?

A

Temperature at which change occurs

19
Q

What is quenching.

A

Rapidly cooling of heated material

20
Q

What is annealing?

A

Heat and allow to cool slowly

21
Q

What is normalising?

A

Heated then soaked, left to cool at room temp

22
Q

Why is tempering used?

A

To decrease hardness after quenching, only for high carbon steel

23
Q

What is case hardening and why is it used?

A

Used for high pressure components, makes outer layer hard

24
Q

What is direct hardening?

A

Flame hardening process, surface heated the cooled rapidly

25
Q

What is flame hardening?

A

Heating with fire torch then quenching with water jet

26
Q

What is induction hardening?

A

Heated with coil, quenched by water jets

M6 (10 decks)

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