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We take this opportunity to give step by step sample preparation method
for Metallorgraphy Analysis.
Click the Topics for Details
:
Pyromatic Specimen Cut-Off Machine
Pyromatic Heat Treatment Furnace
Pyromatic Specimen Mounting Press
Cold Setting Mounting
Pyromatic Linisher/Belt Surface Grinder
Pyromatic Hand Polishing Stand
Pyromatic Disc Polishing Machine
Pyromatic Etchants
Dryer
Pyromatic Specimen Leveller
Pyromatic Microscopy
Pyromatic Specimen Cut-Off Machine
Cut the desired piece with the help of specimen cut off machine which
shall be less than 20mm x 10 mm in size , which size facilitates easy
mounting of specimen through specimen mounting press, while cutting
make sure the water circulation on to the job, this will ensure the
real metallurgical properties of the given specimen, if water is not
circulated the sample/specimen may give wrong results.
Pls Note: We can have the specimen seize as little as 1*1 mm specimen
piece also to mount on the specimen mounting press.
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Pyromatic
Heat Treatment Furnace
We can subject the specimen for heat treatment through the muffle
furnace, we can load gross pieces (bulky pieces) or cut piece as mentioned
above for hardening/annealing/quenching /normalizing etc., after the
process of heat treatment the sample can be sent for Mounting through
Specimen Mounting Press for Hot Mould Mounting or with the Help of
Cold Setting Compound for Cold Mounting . (Ref. Instruction Manual
of Furnace)
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Pyromatic
Specimen Mounting Press
Before or After heat treatment of specimen, specimen can be subjected
for mounting with the help of Specimen Mounting Press or with the
help of Cold Setting Die, if in the case of Specimen Mounting Press,
Position the Subjected Surface of the Specimen facing the Piston of
the Press i.e (Test Side) facing the Piston, If a specimen is to be
subjected for coating thickness/case hardening thickness etc., then
the cross section of the coated surface to be positioned and kept
meticulously to ensure the visibility of both coated and homogeneous
material, then the above test can be done scientifically for quantitative
analysis.( Ref. Instruction Manual of Specimen Mounting Press )
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Cold
Setting Mounting
1. Use the Cold Setting Mould Die of Different Diameter, (based on
the size of the component)
2. a glass base to ensure non stickiness of the specimen after the
cold mould. Position the Specimen to be tested to face the glass plate
below, un like Specimen Mounting Press
3. Take a container to Mix both the constituent i.e the Powder and
the Liquid on 1:1 ratio of the desired quantity, while mixing ensure
the fluidity before pouring in to the die and do this process swiftly
other wise the fluid will solidify before it is transferred to the
mould die.
4. Allow 5 - 10 minutes to set and then remove the specimen mould
which is molded perfectly with the compound.
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Pyromatic
Linisher/Belt Surface Grinder
After Mounting the Metallography Specimen either through Specimen
Mounting Press or through Cold Setting Process, then the specimen
which is exposed to the surface to be subjected to Linishing i.e Belt
Grinding with the help of 80 Grit Belt, and thereupon finer Grit Belts
such as 100 grit, 120 grit etc., Press Gently on the rotating Belt
which will ensure smooth grinding of the specimen and should attain
perfect parallelism in the process., while grinding ensure steady
flow of water, never over heat the specimen, this will trigger wrong
micro structural results. Once the entire Metal Zone is Ground, then
subject the specimen to hand polishing stand. (Ref. Manual of Belt
Grinder Linisher )
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Pyromatic
Hand Polishing Stand
The purpose of this stand is to polish swiftly with various grit size
of emery paper with shortest possible time, 1. fix different grit
of water emery paper say, 100 grit, 200 grit 300, grit 400 grit in
an orderly fashion ie, plate 1 for 100, and 2 for 200 and so on, 2.
ensure cold water connection to the Polishing Stand Distributing Tube,
this will once again ensure perfect metallurgical results. 3 Gently
polish in single direction, bi directional polishing will give scratches
on the subjected surface of the specimen, starting from 100 grit and
gradually upto 600 grit.(Ref Catalogue of Hand Polishing Stand )
O Polishing: Use Zero emery papers such as 1/0 , 2/0, 3/0 and 4/0
for polishing with the help of Hand Polishing Stand, this will further
give mirror finish to the Specimen.
Note : Always a well prepared specimen will give correct replica of
microstructure while subjected to Microscopy.
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Pyromatic
Disc Polishing Machine
After Hand Polishing subject the specimen to Motorised Disc Polishing
Machine, by fixing 1. Dura Cloth for Alumina Powder/Paste and Velvet
Cloth for Diamond Paste, 2. Pour 5 gms of Alumina Powder /10 Grams
of Paste on the Disc and apply evenly through out the surface with
the belp of the specimen and gently put pressure while pressing the
specimen on the Alumina Disc. 3. Note : constant water circulation
is must while Lapping/polishing. 4. Wash the Specimen thoroughly 5.
Then subject the specimen to Velvet Disc where 1cc of Diamond Paste
can be applied with the help of the specimen and spread thoroughly
and start polishing 6. control the speed of the rotating disc for
higher efficiency.
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Pyromatic
Etchants
Use appropriate Etchants such as Steel Etchant for all Steels, Stainless
Steel Etchants for all types of Stainless steel, Cast Iron Etchants
for all types of Cast Iron, Copper Etchants for all Copper based alloys,
1. Pour 50 ml of etchant on a petri dish/ watch glass tray and subject
the specimen for 10 to 30 Seconds based on the concentration of etchant
and reaction of the specimen, after etching the specimen will become
slightly dull in its luster, 2. Wash the Specimen thoroughly with
cold running water with the help of the tap near the wash basin.
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Dryer
After Washing thoroughly ensure that no water marks seen on the surface
of the specimen, because at times water marks will appear like microstructure.
Then dry the specimen with the help of the Electrical Dryer.
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Pyromatic
Specimen Leveller
After Drying the specimen, to ensure the parallelism of the bottom
of the specimen( bakelite area/Cold setting Plastic area) the specimen
should have perfect parallelism to ensure proper focusing of the entire
field of view while subjected to Microscopy .
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Pyromatic
Microscopy
There are different types of Microscopes such as Monocular, Binocular,
Trinocular etc., after leveling the specimen, the Specimen can be
subjected to Microscopy (Ref. Manual of Microcopes). We advice you
to use Pyromatic Imaging system of Computerized Interactive Viewing
of Specimen which will have more memory retention and host of other
advantages for Modern Educational Ambience. and for further Image
Analyzing with the help of Integrated Digital Image Analyzing Kit
available with B.S.PYRO.
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