Table of Content
 

Metal and Non-metals

  • Methods of identification of steel
  • Non-ferrous metals and Alloys
  • Copper Alloys
  • Lead and its alloys
  • Zinc and its alloys
  • Tin and Tin Alloys
  • Aluminium
  • Non-Metals

Metals used in sheet metal work

  • Black iron sheets
  • Galvanised iron sheets
  • Stainless sheets
  • Copper sheet
  • Aluminium sheet
  • Tinned plae
  • Lead sheets

Standard Wire Gauge

Common metals and alloys and their melting points

  • Engineering materials may be ferrous, non-ferrous metal and alloys.

Physical and mechanical properties of metals

  • Physical properties
  • Mechanical properties

Weldability of metals

  • Necessity of weldability of metals

Identitification of metals

  • Tests to identify metals
  • Identification at ferrous metals
  • Identification of Non-ferrous metals

Methods of designating steel

  • Steel designation based on mechanical properties
  • Designation based on chemical composition
  • Unalloyed steel
  • Unalloyed tool steel
  • Unalloyed free cutting steels
  • Low and medium alloy steel
  • High alloy steel
  • High alloy tool steel
  • High alloy free cutting steel

Colour code of metal

  • Color bands and dots

Cast Iron (Types)

  • Types of cast iron

Steel (Plain carbon steel)

Hardness testing methods

  • Brinell hardness testing method
  • Vicker hardness
  • Rockwell hardness testing
  • Shore hardness testing

Tensile testing method

  • Tensile strength of material
  • The tensile test for metals

Impact Strength

  • Impact strength
  • Test specimen of izod test
  • Charpy test
  • Test specimen for charpy test

Weld defects – causes and remedies

  • Welding defects

Casting defects, causes and remedies

  • Scrap diagnosis for casting

Inspection of weld (NDT) – Visual inspection

  • Necessity of inspection
  • Types of tests
  • Visual inspection
  • Visual inspection before welding
  • Visual inspection during welding
  • Inspection after welding
  • Check points for inspection
  • Measuring gauges used for inspection

Methods of Non-destructive test

  • Common non-destructive testing
  • Special non-destructive tests
  • Visual inspection
  • Leak or pressure test
  • Radiographic test
  • Gamma ray test
  • Magnetic particle test

Destructive Test

  • Nick break test
  • Free bend test
  • Advantages and limitations
  • Examination of fractured weld
  • Tensile test
  • Guided bend test
  • Impact test
  • Fatigue test

Safety, precautions in heat treatment shop

Heat treatment of plain carbon steels

  • Heat treatment process and purposes

Hardening and tempering

  • What is hardening?
  • Purpose of hardening
  • The principle of hardening
  • Process of hardening
  • Soaking time
  • Cooling
  • The quenching medium
  • Tempering
  • Purpose of tempering the steel
  • Process of tempering
  • Tempering temperature

Annealing of steel

  • Annealing process

Normal Steel

Surface hardening of steel

  • Types of surface hardening
  • Case hardening
  • Carburising
  • Pack carburising
  • Liquid Carburising
  • Gas carburising
  • Tempering

Nitriding

  • Gas nitriding
  • Nitriding in salt bath
  • Advantages

Flame hardening

Induction hardening

Different structure of steel (plain carbon)

  • Zero per cent carbon
  • Plain carbon steel

The heating and slow cooling of steel

Effects of carbon in steel

Heating steel for heat treatment

  • Critical temperatures
  • Soaking
  • Soaking time
  • Heating the steel
  • Preheating
  • Quenching

Temperature measuring instruments

  • Seger cone method
  • Pyrometer for temperature measurement
  • Types of pyrometer
  • Thermo-Electric pyrometer
  • Optical pyrometer
  • Radiation pyrometer

Types of furnaces

  • Furnaces for specific heat treatment
  • Muffle furnace
  • Pit furnace
  • Continuous heat treating furnace
  • Conveyor furnace

Safety precautions – painting section

  • Safety in paint store
  • Safety to painters
  • Safety in working place

Surface preparation

  • Advantages of good surface preparation
  • Removal of protective coating
  • Removal of rust and surface contaminants
  • Heating process
  • Solvent wiping process
  • Grit or sand blasting
  • Phosphating process

Tools used in surface preparation

  • Dust brush
  • Wire brush
  • Chisel knife
  • Moulding knife
  • Scrapping knife
  • Emery sheet
  • Sand paper
  • Cloth Emery
  • Water proof emery

Primer

  • Types of primer
  • Red oxide primer

Paint Brushes

  • Flat brush
  • Round brush
  • Curve brush
  • Roller brush
  • Advantages of roller brush
  • Disadvantages
  • Artist brush
  • Hints on handling paint brushes

Putty

Spray painting

  • Air compressor and its parts
  • Air filter
  • Flexible hose pipe
  • Parts of spray gun
  • Paint container

Quality of paint and painting

  • Viscosity of paint
  • Elcometer
  • Gloss meter
  • Color of paint checking

Factors to be considered for the quality of paint film

  • Blistering
  • Remedy
  • Flaking
  • Causes
  • Remedies
  • Orange peel

Types of paint and its application

  • Pigment
  • Thinner/solvent
  • Plasticizer
  • Driers/accelerators
  • Inhibitors
  • Anti-Skinning agent
  • Anti-Settling agent
  • Types of paints
  • Aluminium paints and its application
  • Polyurethane paint (Two pack)
  • Advantages of pupaints
  • Disadvantages
  • Hammers one finish paints
  • Application
  • Filler
  • Undercoat and its application
  • Enamel and its application
  • Primer
  • Wash primer

Stenciling and Marking

  • Stenciling
  • Preservation of stencil
  • Types of stencil
  • Negative type
  • Stencil media
  • Advantages and limitation of stencil media
  • Advantages of stenciling process
  • Limitation of stenciling process

Powder coating

  • Metal cleaning and pre-treatment
  • Drying
  • Manufacturing of powders
  • Curing
  • Advantages of powder coating
  • Disadvantages
  • Uses of powder coating application

Apply for Certification

 

https://www.vskills.in/certification/Vskills-Certified-Metals-and-Surface-Finishing-Technician