Metallurgical Engineering.

2. TO IDENTIFY THE HEAT TREATMENT
PROCESS PERFORMED ON A GIVEN
SPECIMEN.

3.  Observing the microstructure
 Identifying the H.T process
 Perform Hardness Test on specimen

4. Sectioning and cutting
Mounting
Planner Grinding
Intermediate Polishing
Fine Polishing
1. Etching
Observing The Hardness Test

5.  Dual clamping.
 Transparent
shield.
 Rack and
penion.
 Cooling
system .
 Lubricating
Oil(29:1)

6. • To preserve the specimen
• To have a good grip on the specimen
for polishing
SPECIMEN

7. • 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

8. 2.Mounting unit:
•Mould cylinder
•Mould plunger
•Spacer
•Heating/Cooling system
•Thermostat
•Clock alarm
Plunger
Cylinder

9. We used Backlite Powder for which :-
Working Temperature = 160°C to 170°C
Working Pressure = 130 kg/cm²
Working Time = 6 to 9 minutes

11. To decrease the depth of scratch as a result
of sectioning.
Course grit abrasive is used ( SiC paper )
Wet and Pressure grinding is used
The angle must be changed upto 45 degree
after each successive 4-5mins

12.  To make the surface shinny
 It wont remove the scratches
 Diamond paste was used
along with an oil
 A radial to and fro motion
was given to the specimen to
make it mirror like

13. To increase the optical behavior of
micro-structural feature
Improve the grain size and
visibility of phases
Etching is done by an echant
known as Nital solution
Regent attacks selectively on the
specimen

14. After etching specimen was
then dried with dryer.
Heater is used to dry the
specimen
HEATER

17.  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 .

18. ANY QUESTIONS ???