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structural pM parts
The
structural PM parts manufactured through the method of Powder Metallurgy
(gear wheels, pawls, disks, rings, sleeves, etc.) are widely used in engineering
and other branches of industry.
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Size
limitations for the structural PM parts
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| Cross
section area |
< 80 mm2 |
| Maximum overall
dimension |
< 180 mm |
| Height |
From 3 to 50 mm |
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| Types
of structural PM parts according to their technological characteristics
and chemical composition |
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Structural PM parts of low density:
6.4 to 6.9 x 103 kg/m3
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| Basic properties: |
| Tensile
strength |
From 150 to 350 MPa |
| Relative elongation |
From 0.5 to 6% |
| Brinell hardness |
From 300 to 1000 MPa |
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| Material options:
sintered steel alloyed with copper, sintered steel alloyed with carbon and
copper, sintered steel alloyed with chromium, sintered steel alloyed with
chromium and nickel, sintered steel alloyed with phosphorus, sintered steel
alloyed with copper and nickel, sintered steel alloyed with nickel, sintered
bronze, sintered bronze graphite. |
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| Structural
PM parts of medium density: 6.9 to 7.2 x 103
kg/m3 |
| Basic
properties: |
| Tensile strength |
From 180 to 600 MPa |
| Relative elongation |
From 1.3 to 20% |
| Brinell hardness |
From 450 to 1100 MPa |
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| Material options:
sintered steel alloyed with copper, sintered steel alloyed with chromium,
sintered steel alloyed with chromium and nickel, sintered steel alloyed
with copper and nickel, sintered steel alloyed with nickel, sintered bronze. |
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| Structural
PM parts of high density: more than 7.2 x 103
kg/m3 |
| Basic
properties: |
| Tensile strength |
From 400 to 600 MPa |
| Relative elongation |
From 1
to 15% |
| Brinell hardness |
From 700 to 1600 MPa |
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| Material options:
iron impregnated with copper, iron-graphite impregnated with copper, steel
impregnated with copper, iron-graphite impregnated with brass. |
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| Structural
PM parts of steel alloyed with chromium and nickel. Structural PM parts
of stainless steel |
| Basic
properties: |
| Density |
From 6.3 to 7.4 x 103
kg/m3 |
| Tensile strength
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From 230 to 500 MPa |
| Relative
elongation |
From 3 to 15% |
| Brinell hardness |
From 700 to 1300 MPa |
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| Material options:
steel alloyed with chromium in the range from 13 to 20% and nickel up to
14%. |
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| Hydraulically
dense parts (very typical application is attachment flanges in the engineering
of food processing machines) |
| Basic
properties: |
| Density |
> 7.4 x 103
kg/m3 |
| Tensile strength
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> 500
MPa |
| Relative
elongation |
From 3 to
15% |
| Brinell hardness |
From 900
to 1400 MPa |
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| Material options:
steel alloyed with chromium in the range from 13 to 20%, nickel up to 14%
and molybdenum up to 3%. |
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| Structural
brass parts |
| Basic
properties: |
| Density |
From 7.1 to 7.7 x 103
kg/m3 |
| Tensile strength |
From 110
to 240 MPa |
| Relative elongation |
From 11 to
18% |
| Brinell hardness |
From 300
to 500 MPa |
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| Material options:
sintered brass, sintered high-density brass. |
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| Structural
copper parts |
| Basic
properties: |
| Density |
From 8.0 to 8.4 x 103
kg/m3 |
| Tensile strength
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From 180 to 220 MPa |
| Brinell hardness
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From 400 to 500 MPa |
| Electric
resistance |
From 0.032 to 0.045 x
106 ohm.m |
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| Material options:
sintered copper, sintered high density copper. |
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Structural
PM parts with a pre-set coefficient of thermal expansion
Basic properties: |
| Density |
From 7.3 to 7.5 x 103
kg/m3 |
| Tensile strength |
From 380 to 400 MPa |
| Relative
elongation |
From 12 to 13% |
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| Material options:
sintered iron-nickel, iron-nickel-cobalt. |
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Several
typical applications of the Structural PM parts
· In engines: oil pump gear wheels, valve
guides, toothed bushes, and synchronizers.
· In agricultural engineering: metering wheels, arresters, rolls,
and spacer bushes.
· In hydraulics: distributing plates, supporting plates, spacer bushes,
sockets.
· In electrical engineering: stator bushes, brush holders, gearwheels,
and eccentrics.
· In automobile industry: shock absorber parts. |
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