study the macroscopic properties of steel .

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Metallurgical Engineering.

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study the macroscopic properties of steel .

  1. 1. TO IDENTIFY THE HEAT TREATMENTPROCESS PERFORMED ON A GIVENSPECIMEN.
  2. 2.  Observing the microstructure Identifying the H.T process Perform Hardness Test on specimen
  3. 3. Sectioning and cutting Mounting Planner Grinding Intermediate Polishing Fine Polishing 1. EtchingObserving The Hardness Test
  4. 4.  Dual clamping. Transparent shield. Rack and penion. Cooling system . Lubricating Oil(29:1)
  5. 5. • To preserve the specimen• To have a good grip on the specimen for polishing SPECIMEN
  6. 6. • MOUNTING PRESS:1.Hydraulic unit:•Hand pump•Quick release valve•Pressure gauge•Cross head beam Cross head beam Hydraulic jack handle Pressure gauge Time set Quick release valve
  7. 7. 2.Mounting unit:•Mould cylinder•Mould plunger•Spacer•Heating/Cooling system•Thermostat•Clock alarm Plunger Cylinder
  8. 8. We used Backlite Powder for which :-Working Temperature = 160°C to 170°CWorking Pressure = 130 kg/cm²Working Time = 6 to 9 minutes
  9. 9. To decrease the depth of scratch as a result of sectioning.Course grit abrasive is used ( SiC paper )Wet and Pressure grinding is usedThe angle must be changed upto 45 degreeafter each successive 4-5mins
  10. 10.  To make the surface shinny It wont remove the scratches Diamond paste was usedalong with an oil A radial to and fro motionwas given to the specimen tomake it mirror like
  11. 11. To increase the optical behavior ofmicro-structural featureImprove the grain size andvisibility of phasesEtching is done by an echantknown as Nital solutionRegent attacks selectively on thespecimen
  12. 12. After etching specimen was then dried with dryer. Heater is used to dry the specimenHEATER
  13. 13.  OUR SPECIMEN IS ANNEALED During Planner grinding & intermediate polishing , scratch removal was quite easy. The specimen is soft Refined grain structure More Ferrite grains & less pearlite grains .
  14. 14. ANY QUESTIONS ???

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