Teaching Aids Service by KRRC Information Section

Amruta Karve AIKTC, New Panvel A material is a physical substance used to make things. Metals, plastics, ceramics, glass and fibres are some of the main categories for materials. If we look around, everything we see is made from a material, sometimes more than one....

Amruta Karve AIKTC, New Panvel For example: The clothes you are wearing are made from fibres. The chair you are sitting on is made from plastic. The windows in the school are made from glass. Can you see any other examples around you?

Amruta Karve AIKTC, New Panvel A property of a material is a description of the characteristics which it has. They are adjectives which tell us about the material. Materials have different properties and characteristics depending on what they are used for. Some materials are hard, others are soft. Some are strong, others are weak.

Amruta Karve AIKTC, New Panvel Here is a list of the properties which describe different materials: Shiny – It reflects light Strong – It won’t break easily Flexible – It can be bent easily without breaking Light - It doesn’t weigh much Heavy – It weighs a lot Coloured – Has colour Magnetic – It’s attracted to magnets Bendy - Flexible

Amruta Karve AIKTC, New Panvel Hard – Something which can’t be bent easily Brittle – It’s hard but will break easily Malleable – It can be shaped easily Magnetic – It’s attracted to magnets Bendy – Flexible Transparent – Something you can see through Translucent – Something you can partially see through Opaque – Something you can not see through Conductor – It allows heat or electricity to pass through Insulator – It doesn’t allow heat or electricity to pass through.

Amruta Karve AIKTC, New Panvel Which of the previous words could you use to describe: A) a pencil... Hard, light, opaque B) A window Transparent or translucent, hard, brittle C) A piece of paper... Light, opaque, malleable D) A fork... Shiny, hard, magnetic, opaque, conductor

Amruta Karve AIKTC, New Panvel

Q) Why is copper suitable for electrical wiring? What properties must it have? - Good conductor of electricity - It is strong.

Amruta Karve AIKTC, New Panvel Why are saucepans made from metal? Which properties make it suitable for the use? - It is a good conductor or heat. - It is It does not melt with high temperatures. - It is strong

Amruta Karve AIKTC, New Panvel HOT WORKING Hot working refers to the process where metals are defromed above their recrystallizatıon tempereture and strain hardening does not occur.Hot working performed at elevated tempreature.However is hot working at room temperature because of its low melting temperature.

Amruta Karve AIKTC, New Panvel COLD WORKING Plastic deformation which is carried out in a temperature region and over a time interval such that the strain hardening is not relieved is called cold working.

Amruta Karve AIKTC, New Panvel

Hot Rolling Grain refinement in hot rolling process

Amruta Karve AIKTC, New Panvel

Rolling mills may be classified according to the number and arrangement of the rolls. (a): Two high rolling mills (b): Three high rolling mills (c): Four high rolling mills (d): Tandem rolling mills (e): Cluster rolling mills

Amruta Karve AIKTC, New Panvel Two- high Rolling Mill

Amruta Karve AIKTC, New Panvel Three high rolling mills

Amruta Karve AIKTC, New Panvel Four high rolling mills

Amruta Karve AIKTC, New Panvel Cluster rolling mills

Amruta Karve AIKTC, New Panvel Defects in Rolling

Amruta Karve AIKTC, New Panvel

Seamless Tubing Process

Amruta Karve AIKTC, New Panvel Thread Rolling Process

Amruta Karve AIKTC, New Panvel Forging Process

Amruta Karve AIKTC, New Panvel Open die Forging Lower Die (Fixed) Upper Die Movable

Amruta Karve AIKTC, New Panvel

Impression- Die or Closed Dir Forging

Amruta Karve AIKTC, New Panvel Drop Forging

Amruta Karve AIKTC, New Panvel Machine or Upset Forging

Amruta Karve AIKTC, New Panvel Impact Extrusion

Amruta Karve AIKTC, New Panvel Direct Extrusion (Forward Extrusion ) To produce Solid Component

Amruta Karve AIKTC, New Panvel To Produce Hollow Components

Amruta Karve AIKTC, New Panvel Indirect Extrusion

Amruta Karve AIKTC, New Panvel Wire Drawing

Amruta Karve AIKTC, New Panvel

Tube drawing

Amruta Karve AIKTC, New Panvel