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Manufacturing Technology > Metals > Flashcards

Metals Flashcards

1
Q

refers to the group of materials that are used in the construction of manmade structures and components

A

Engineering Materials

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2
Q

refers to the group of materials that are used in the construction of manmade structures and components

A

Engineering Materials

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3
Q

Classification of Engineering Materials

A

Metallic
Non-metallic
Newborn engineering materials

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4
Q

Classification of Engineering Materials

A

Metallic
Non-metallic
Newborn engineering materials

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5
Q

__________ are usually lustrous, ductile, malleable and good conductors of electricity.

A

Metallic

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6
Q

two classified Metallic Material

A

Ferrous and Non-ferrous

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7
Q

Example of Metallic

A

Silver
Copper
Gold
Aluminum
zinc
lead
tin

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8
Q

Example of Metallic

A

Silver
Copper
Gold
Aluminum
zinc
lead
tin

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9
Q

refers to those materials whose main constituent is iron.

A

Ferrous

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10
Q

melting points of iron

A

1540°c

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11
Q

melting points of iron

A

1540°c

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12
Q

is an alloy of iron and carbon, the percentage of carbon theoretically varies from 0-2%

A

Steel

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13
Q

Classification of Steel

A

Plain Carbon and alloy

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14
Q

________________ is that steel which the only alloying element present is carbon

A

Plain Carbon Steel

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15
Q

________________ is that steel which the only alloying element present is carbon

A

Plain Carbon Steel

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16
Q

low carbon or dead mild steel having carbon below ________

A

0.15

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16
Q

mild steel having carbon between __________

A

0.15-0.3%

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16
Q

medium carbon steel having carbon between _________

A

0.3-0.7%

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16
Q

High carbon steels having carbon content above _______

A

0.7% ( the higher practical limit of C% IS 1.3%)

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16
Q

It has got very good weldability and ductility.

A

Dead mild steel

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16
Q

It is used very extensively for structural work.

A

Mild steel

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17
Q

It has little weldability but is stronger and has better wearing property the mild steel.

A

Medium carbon steel

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17
Q

It is used for hand tools like cold working dies, hammer, boiler maker’s tool, wood working tools, hand taps and reamers, filters, razors, shear blades etc.

A

High carbon steels

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17
Q

It is the purest form of iron

A

Wrought Iron

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17
Q

contain more the 2% carbon, which is the theoretical limit for steels.

A

Cast irons

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17
Q

Varieties of Cast Iron

A

Grey cast iron
White cast iron
Malleable cast iron
Nodular cast iron
Alloy cast iron

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17
Q

is very widely used in the forms of casting.

A

Grey cast iron

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17
Q

iron has 2 to 2.5% carbon and most of it is in the form of cementite.

A

White cast iron

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17
Q

starts out as white casting but is the threated at a heat of roughly 1,650 F, 900 C.

A

Malleable iron

17
Q

is also called ductile iron, spheroidal graphite iron, and spheroidal graphite cast iron, is graphite-rich cast iron.

A

Nodular cast iron

17
Q

have higher strength, heat-resistance and greater wear-resistance etc.

A

Alloy cast iron

18
Q

what are the 3 groups of steels?

A

stainless steels
tool steel
special steels

19
Q

These steels are called stainless because they do not corrode or rust easily.

A

Stainless Steel

20
Q

Stainless steels are further divided into the following three categories

A

Ferritic
Martensitic
Austenitic

21
Q

These steels contain a maximum of 0.15% carbon, 6-12% chromium, 0.5% nickel besides iron and usual amounts of manganese and silicon.

A

Ferritic Stainless Steel

22
Q

These stainless have 12-18% chromium but contain higher carbon percentage (0.15-1.2%).

A

Martensitic Stainless Steel

23
Q

These are the most important and costliest among all stainless steels.

A

Austenitic Stainless Steel

24
Q

refers to different types of strong carbon and alloy steels that are especially suitable for making tools like reamers, drills, machine dies, and hand tools since they are very hard, resistant to wearing down and deformation, and can keep a sharp edge even when subjected to elevated temperatures.

A

Tool Steel

25
Q

They are used for railway points and crossings, and with usage they become more wear-resistant.

A

Manganese Steels

26
Q

makes the steel highly resistant to corrosion, non-magnetic, and having very low coefficient of thermal expansion.

A

Nickel Steels

27
Q

makes steel corrosion resistant and increases its UTS.

A

Chromium

28
Q

A steel containing 0.05% carbon, about 0.3% Mn and 3.4% of silicon possesses extremely low magnetic hysteresis and is used widely for making laminations of electrical machines.

A

Silicon Steels.

29
Q

Kinds of heat treatment given to carbon steels

A

Annealing
Normalizing
Hardening
Tempering

29
Q

is a heat treatment process that is used to make more ductile and tough after it has been subjected to thermal or mechanical hardening processes.

A

Normalizing

29
Q

The purpose of ________________ is to soften the material.

A

Annealing

30
Q

involves heating and soaking.

A

Hardening

31
Q

means giving up a certain amount of hardness but shedding a great deal of brittleness acquired in the process of hardening.

A

Tempering

32
Q

Only those carbon steels can be hardened whose carbon content is about 0.25% or more.

A

Case Hardening

33
Q

They are softer and there more malleable.

A

Non-Ferrous Metals and Alloy

34
Q

is a corrosion resistant metal of an attractive reddish brown color.

A

Copper

35
Q

is a difficult to extract from its main called bauxite.

A

Aluminum

36
Q

It has an attractive silvery white color.

A

Tin

37
Q

is a heavy metal with dull grey appearance.

A

Lead

38
Q

possesses a bluish grey metallic appearance,

A

Zinc

39
Q

is a alloy of copper and zinc

A

Brass

40
Q

is an alloy of copper and tin although commercial bronzes may contain other elements besides tin.

A

Bronzes

41
Q

Give the Varieties of tin bronzes that are commonly used

A

Phosphor-Bronze
Leaded-Bronze
Gun-metal
Bell-metal

42
Q

Addition of 0.5% phosphorous to tin bronze results in production of phosphorous bronze.

A

Phosphor-Bronze

43
Q

is actually a source of weakness but adds to machinability and has self lubrication properties.

A

Leaded-Bronze

44
Q

This bronze is used for bearing bushes glands, pumps, valves etc.

A

Gun-metal

45
Q

Type of bronze contain no tin. It possesses good strength and good corrosion resistance. Color: golden yellow. Often used for jewelry. Composition: 14%

A

Aluminum Bronze

45
Q

It is a tin bronze but having a very high percentage of tin (20-25%). It gives a good tinkling sound on being struck with a hammer.

A

Bell-metal

46
Q

Type of bronze contain no tin. Possesses extremely good corrosion resistance. Can be cold worked and strain-hardened. Used for boiler fitting and marine fittings. Composition: 1-4%

A

Silicon Bronze

47
Q

Type of bronze contain no tin. It is essentially a brass which manganese has been added. It is used for ship’s propellers. Composition: 40%

A

Manganese Bronze

48
Q

Type of bronze contain no tin that very costly. It contains about 2% Be. It has very good mechanical properties and can be cold worked and age-hardened. It is mainly used for bellows, bourdon gauge tubes etc.

A

Beryllium Bronze

49
Q

They are extensively used for marine fittings. They also possess good strength, hardness and ductility.

A

Cupro-nickels

50
Q

It is a cupro-nickel to which zinc has been added.

A

German silver

51
Q
A
52
Q

Its composition is 68% nickel, 30% copper, 1% iron, remainder manganese etc.

A

Monel metal

52
Q

Alloys principally containing, chromium and iron. Used in electrical industry.

A

Inconel and incoloy

52
Q

Alloy of nickel and chromium, which is used as heat resistant electrical wire in furnaces and heating devices like geysers, electric iron etc.

A

Nichrome

Manufacturing Technology (2 decks)

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