Powder metallurgy involves compacting metal powder and sintering it to form solid parts. Key steps include powder production, blending/mixing, compaction, and sintering. Sintering heats the compacted powder below melting to allow atomic diffusion and bonding between particles. Powder metallurgy is useful for making complex, porous, or multi-material parts that are otherwise difficult to produce.
Powder Metallurgy or PM is a process of producing components or materials from powders made of metal. Different geometries can be obtained by this process. This may also include non metal powders. PM or Powder Metallurgy reduces the metal removal process to obtain a desired structure, reduces yield loss while manufacturing and cut down cost.
www.catalystrecoveryfilter.com
This PPT contains information about basic operations of Powder Metallurgy(PM). it is consist of manufacturing techniques of powder, and manufacturing of products by the powder.
Powder metallurgy (PM) is a term covering a wide range of ways in which materials or components are made from metal powders. PM processes can avoid, or greatly reduce, the need to use metal removal processes, thereby drastically reducing yield losses in manufacture and often resulting in lower costs.
Conventional Powder-Metallurgy Process
The powder-metallurgy (PM) process, depicted in the diagram below, involves mixing elemental or alloy powders, compacting the mixture in a die and then sintering, or heating, the resultant shapes in an atmosphere-controlled furnace to metallurgically bond the particles.
FT-9, FT-10, and FT-23 is Powder Metallurgy Alloy Steel made by the Daewha Alloytech Powder
Metallurgy Process (Canning HIP). They provide superior wear resistance while maintaining toughness
and fabrication characteristics comparable to Rolling Steel such as D2, M2.
Mill rolls, Pinch rolls, Guider rollers, Table roller for Cold/Hot Rolling is superior to general Rolling and
Casting steels in improving wear-resistance for above products.
Presently, It is widely used in domestic and overseas markets.
Powder Metallurgy or PM is a process of producing components or materials from powders made of metal. Different geometries can be obtained by this process. This may also include non metal powders. PM or Powder Metallurgy reduces the metal removal process to obtain a desired structure, reduces yield loss while manufacturing and cut down cost.
www.catalystrecoveryfilter.com
This PPT contains information about basic operations of Powder Metallurgy(PM). it is consist of manufacturing techniques of powder, and manufacturing of products by the powder.
Powder metallurgy (PM) is a term covering a wide range of ways in which materials or components are made from metal powders. PM processes can avoid, or greatly reduce, the need to use metal removal processes, thereby drastically reducing yield losses in manufacture and often resulting in lower costs.
Conventional Powder-Metallurgy Process
The powder-metallurgy (PM) process, depicted in the diagram below, involves mixing elemental or alloy powders, compacting the mixture in a die and then sintering, or heating, the resultant shapes in an atmosphere-controlled furnace to metallurgically bond the particles.
FT-9, FT-10, and FT-23 is Powder Metallurgy Alloy Steel made by the Daewha Alloytech Powder
Metallurgy Process (Canning HIP). They provide superior wear resistance while maintaining toughness
and fabrication characteristics comparable to Rolling Steel such as D2, M2.
Mill rolls, Pinch rolls, Guider rollers, Table roller for Cold/Hot Rolling is superior to general Rolling and
Casting steels in improving wear-resistance for above products.
Presently, It is widely used in domestic and overseas markets.
Powder Metallurgy enables the processing of materials with very high melting points, including refractory metals such as tungsten, molybdenum, and tantalum. Such metals are very difficult to produce by melting and casting and are often very brittle in the cast state.
Advantages of Powder Metallurgy
It can be very economical for mass production (100,000 parts). Long term reliability through close control of dimensions and physical properties. Very good material utilization - loss of material very less. Minimization or elimination of Machining.
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5. Examples of Powder
Metal Products
Gears
Cams
Cranks
Bearings
Roller bearing cages
Housings
Light bulb filaments
Sprinkler mechanisms
6. Powder Metal Materials
Elemental
A pure metal, most commonly
iron, aluminum or copper
Prealloyed
An alloy of the required
composition, most commonly
copper alloys, stainless steel
or high-speed steel
8. Powder Manufacturing
Other methods of producing
powder:
- Chemical reduction of
particulate compounds
- Electrolytic deposition
- Pulverization or grinding of
brittle materials
- Thermal decomposition
- Precipitation from solutions
- Condensation of metal vapors
11. Particle Size
Micrograph of screened powder particles, showing
that particles may be longer than the mesh is wide
12. Particle Size
Mixing particles of different sizes allows decreased
porosity and a higher packing ratio
void
smaller, more numerous voids
voids filled by smaller particles,
small voids remain
14. Blending and Mixing
Blending
Combining powders of the same material
but possibly different particle sizes
Mixing
Combining powders of different materials
23. Sintering
Strength of sintered structures as related to density,
showing that the strength is higher when the density
is higher (less residual porosity)
24. Other Powder Metal
Processes
Cold Isostatic Pressing
Hot Isostatic Pressing
Injection Molding
Powder Rolling
Powder Extrusion
Plasma Spraying
25. Isostatic Pressing
Uses pressurized fluid to compress the
powder equally in all directions
Cold Isostatic Pressing
Compaction performed at room
temperature
Hot Isostatic Pressing
Performed at high temperatures and
pressures
32. Powder Metal Products
1. Porous or permeable
products
2. Products of complex shapes
3. Products made of materials
that are difficult to machine or
have high melting points
4. Products which require the
combined properties of
multiple materials
5. Products in which powder
metallurgy produces superior
properties
33. Powder Metallurgy
Design
1. The shape must permit removal
from the die
2. The shape should not have thin
walls or sharp corners
3. The shape should permit the
construction of strong tooling
4. The shape of the part should be
within the thickness range for
which the powder can be properly
compacted
5. The part should have as few
changes in section thickness as
possible
34. Powder Metallurgy
Design
6. Parts can be designed to take
advantage of the capabilities of
the powder metallurgy process
7. The design should be consistent
with available equipment
8. Consideration should be given for
product tolerances
9. Design should consider the
dimensional changes that occur
after pressing, such as shrinkage
during sintering
37. Powder Metallurgy
Advantages
1. Elimination/reduction of
machining
2. High production rates
3. Complex shapes can be
produced
4. Wide composition variations
are possible
5. Wide property variations are
possible
6. Scrap is eliminated or
reduced
38. Powder Metallurgy
Disadvantages
1. Inferior strength properties
2. Relatively high die cost
3. High material cost
39. Summary
Powder metallurgy can create
parts that would otherwise be
difficult to form, including those
with complex shapes or
porosity
Sintering bonds particles
together by allowing atoms to
move, forming necks and grain
boundaries between the
particles