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Outline
Indent Level
Color Curly Brackets (indicating CPC extensions to IPC)

CPC
COOPERATIVE PATENT CLASSIFICATION
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WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (processes or devices for granulating materials in general B01J 2/00; making ceramics by compacting or sintering C04B, e.g. C04B 35/64; for the production of metals as such, see class C22; reduction or decomposition of metal compounds in general C22B; making alloys by powder metallurgy C22C; electrolytic production of metal powder C25C 5/00)
NOTE
-
This subclass covers the making of metallic powder only insofar as powder with specific physical characteristics is made;

In this subclass, the following terms or expressions are used with the meanings indicated:

- "metallic powder" covers powders containing a substantial
proportion of non-metallic material;
- "powder" includes somewhat larger particles which are worked,
obtained or behave in a manner similar to powder, e.g. fibres.

WARNING
-

1. The following IPC groups are not used in the CPC scheme. Subject matter covered by these groups is classified in the following CPC groups:
B22F3/035 covered by B22F 3/03


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Special treatment of metallic powder, e.g. to facilitate working, to improve properties
{
(treatment of powder by mechanical means, e.g. by grinding, milling, rolling B22F 9/04)
}
; Metallic powders per se, e.g. mixtures of particles of different composition (C04, C08 take precedence;
{
amorphous powder B22F 9/002
}
)
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B22F 1/0003
.
{
Metallic powders per se; Mixtures of metallic powders; Metallic powders mixed with a lubricating or binding agent (making ferrous alloys using a mixture of prealloyed powders C22C 33/0207)
}
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B22F 1/0007
. .
{
Metallic powder characterised by its shape or structure, e.g. fibre structure
}
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B22F 1/0011
. . .
{
Metallic powder characterised by size or surface area only
}
WARNING
-
Groups B22F 1/0011 and B22F 1/0014 are not complete, see also B22F 1/0007

B22F 1/0014
. . . .
{
by size mixtures or distribution
}
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B22F 1/0018
. . . .
{
Nanometer sized particles
}
B22F 1/0022
. . . . .
{
Dispersions or suspensions thereof
}
{
WARNING: Not complete, see also B22F 1/0018
}
B22F 1/0025
. . . . .
{
Nanofibres or nanotubes
}
{
WARNING: Not complete, see also B22F 1/0018
}
B22F 2001/0029
. . . . .
{
Hollow particles, including tubes and shells
}
B22F 2001/0033
. . . . .
{
Flake form nanoparticles
}
B22F 2001/0037
. . . . .
{
Complex form nanoparticles , e.g.. prism, pyramid, octahedron
}
B22F 1/004
. . .
{
Fibre structure (B22F 1/0025 takes precedence)
}
B22F 1/0044
. . .
{
Nanometer size structures
}
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B22F 1/0048
. . .
{
Spherical powder
}
B22F 1/0051
. . . .
{
Hollow particles
}
B22F 1/0055
. . .
{
Flake form powders
}
{
WARNING: Not complete, see also B22F 1/0007
}
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B22F 1/0059
. .
{
Metallic powders mixed with a lubricating or binding agent or organic material
}
B22F 1/0062
. . .
{
Powders coated with organic material
}
B22F 2001/0066
. . .
{
Organic binder comprising a mixture or obtained by reaction of more than one component other than solvent, lubricant
}
B22F 1/007
. . .
{
Non-organic or metal salt binders or lubricants
}
B22F 1/0074
. . .
{
Organic materials comprising a solvent e.g. for slip casting
}
B22F 1/0077
. . .
{
Mixtures obtained by warm mixing
}
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B22F 1/0081
.
{
Special treatment of metallic powder, e.g. to facilitate working, to improve properties (coating with organic material B22F 1/0062)
}
B22F 1/0085
. .
{
Thermal or thermo-mechanical treatment
}
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B22F 1/0088
. .
{
Chemical treatment, e.g. passivation
}
B22F 2001/0092
. . .
{
Making a dispersion
}
B22F 1/0096
. .
{
Treatment resulting in the production of agglomerates
}
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B22F 1/02
.
comprising coating of the powder
{
(coating with organic material B22F 1/0062; chemical surface treatment B22F 1/0088)
}
B22F 1/025
. .
{
Metallic coating
}
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Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor;
{
Presses and furnaces
}
B22F 3/001
.
{
Starting from powder comprising reducible metal compounds (making ferrous alloys starting from compounds C22C 33/0235)
}
B22F 3/002
.
{
Manufacture of articles essentially made from metallic fibres
}
B22F 3/003
.
{
Apparatus, e.g. furnaces (in general F27B)
}
B22F 3/004
.
{
Filling molds with powder (feeding material to presses in general B30B 15/302)
}
B22F 3/005
.
{
Loading or unloading powder metal objects (transport in general B65G)
}
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B22F 3/006
.
{
Amorphous articles
}
B22F 3/007
. .
{
by diffusion starting from non-amorphous articles prepared by powder metallurgy
}
B22F 3/008
.
{
Selective deposition modelling (B22F 3/1055 takes precedence)
}
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B22F 3/02
.
Compacting only
B22F 2003/023
. .
{
Lubricant mixed with the metal powder
}
B22F 2003/026
. .
{
Mold wall lubrication or article surface lubrication
}
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. .
Press-moulding apparatus therefor
B22F 2003/031
. . .
{
with punches moving in different directions in different planes
}
B22F 2003/033
. . .
{
with multiple punches working in the same direction
}
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B22F 3/04
. .
by applying fluid pressure
{
e.g. by cold isostatic pressing [CIP
}
]
B22F 3/045
. . .
{
Semi-isostatic pressure
}
B22F 3/06
. .
by centrifugal forces
. .
by explosive forces
{
(generating shock waves in general G10K 15/043)
}
B22F 3/087
. .
using high energy impulses, e.g. magnetic field impulses
. .
using vibrations
{
or friction
}
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B22F 3/10
.
Sintering only
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B22F 3/1003
. .
{
Use of special medium during sintering, e.g. sintering aid
}
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B22F 3/1007
. . .
{
Atmosphere (B22F 3/1021 takes precedence)
}
B22F 3/101
. . . .
{
Changing atmosphere
}
B22F 2003/1014
. . .
{
Getter
}
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B22F 3/1017
. .
{
Multiple heating or additional steps (B22F 3/101 takes precedence)
}
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B22F 3/1021
. . .
{
Removal of binder or filler (removal of binder from ceramics C04B 35/638)
}
B22F 3/1025
. . . .
{
not by heating only
}
B22F 3/1028
. . .
{
Controlled cooling
}
B22F 2003/1032
. .
{
comprising a grain growth inhibitor
}
B22F 3/1035
. .
{
Liquid phase sintering
}
B22F 3/1039
. .
{
by reaction (B22F 3/001, B22F 3/23 take precedence)
}
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B22F 2003/1042
. .
{
with support for articles to be sintered
}
B22F 2003/1046
. . .
{
with separating means for articles to be sintered
}
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. .
by using electric current
{
other than for infra-red radiant energy
}
, laser radiation or plasma (B22F 3/11 takes precedence);
{
by ultrasonic bonding (B22F 3/115 takes precedence)
}
B22F 2003/1051
. . .
{
by electric discharge
}
B22F 2003/1052
. . .
{
assisted by energy absorption enhanced by the coating or powder
}
B22F 2003/1053
. . .
{
by induction
}
B22F 2003/1054
. . .
{
by microwave
}
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B22F 3/1055
. . .
{
Selective sintering, i.e. stereolithography (selective sintering of powdered plastics B29C 67/0077)
}
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B22F 2003/1056
. . . .
{
Apparatus components, details or accessories
}
B22F 2003/1057
. . . . .
{
for control or data processing, e.g. algorithms
}
B22F 2003/1058
. . . . .
{
Support structures for the 3D object during manufacturing, e.g. using sacrificial material
}
B22F 2003/1059
. . . . .
{
for cleaning or recycling
}
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B22F 3/11
. .
Making porous workpieces or articles
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B22F 3/1103
. . .
{
with particular physical characteristics
}
B22F 2003/1106
. . . .
{
Product comprising closed porosity
}
B22F 3/1109
. . . .
{
Inhomogenous pore distribution (composite layers of porous nature B22F 7/002)
}
B22F 3/1112
. . . .
{
comprising hollow spheres or hollow fibres
}
B22F 3/1115
. . . .
{
comprising complex forms, e.g. honeycombs
}
B22F 3/1118
. . . .
{
comprising internal reinforcements
}
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B22F 3/1121
. . .
{
by using decomposable, meltable or sublimatable fillers
}
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B22F 3/1125
. . . .
{
involving a foaming process
}
B22F 2003/1128
. . . . .
{
Foaming by expansion of dissolved gas, other than with foaming agent
}
B22F 2003/1131
. . . . .
{
Foaming in a liquid suspension and decomposition
}
B22F 3/1134
. . . .
{
Inorganic fillers (carbonaceous or paper filler B22F 3/1121)
}
B22F 3/1137
. . . .
{
by coating porous removable preforms
}
B22F 3/114
. . .
{
the porous products being formed by impregnation (B22F 3/1137, B22F 3/26 take precedence)
}
B22F 3/1143
. . .
{
involving an oxidation, reduction or reaction step
}
B22F 3/1146
. . .
{
After-treatment maintaining the porosity (B22F 3/114 takes precedence)
}
.
by spraying molten metal, i.e. spray sintering, spray casting
{
(also classified in C23C 4/121, C23C 4/185)
}
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B22F 3/12
.
Both compacting and sintering (by forging B22F 3/17)
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B22F 3/1208
. .
{
Containers or coating used therefor
}
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B22F 3/1216
. . .
{
Container composition
}
B22F 3/1225
. . . .
{
Glass
}
B22F 3/1233
. . . .
{
Organic material
}
B22F 3/1241
. . . .
{
layered
}
B22F 3/125
. . .
{
Initially porous container
}
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B22F 3/1258
. . .
{
Container manufacturing
}
B22F 3/1266
. . . .
{
by coating or sealing the surface of the preformed article, e.g. by melting
}
B22F 3/1275
. . . .
{
by coating a model and eliminating the model before consolidation
}
B22F 3/1283
. . . .
{
Container formed as an undeformable model eliminated after consolidation
}
B22F 3/1291
. . . .
{
Solid insert eliminated after consolidation
}
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B22F 3/14
. .
simultaneously
B22F 2003/145
. . .
{
by warm compacting, below debindering temperature
}
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B22F 3/15
. . .
Hot isostatic pressing
B22F 2003/153
. . . .
{
apparatus specific to HIP
}
B22F 3/156
. . . .
{
by a pressure medium in liquid or powder form
}
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B22F 3/16
. .
in successive or repeated steps
{
WARNING: Subgroups of B22F 3/16 are not complete, see also B22F 3/16
}
B22F 3/162
. . .
{
Machining, working after consolidation
}
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B22F 3/164
. . .
{
Partial deformation or calibration
}
B22F 2003/166
. . . .
{
Surface calibration, blasting, burnishing, sizing, coining
}
B22F 3/168
. . . .
{
Local deformation
}
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B22F 3/17
.
by forging
B22F 3/172
. .
{
Continuous compaction, e.g. rotary hammering (with axial pressure and without reduction of section B22F 3/204)
}
B22F 2003/175
. .
{
by hot forging, below sintering temperature
}
B22F 3/177
. .
{
Rocking die forging
}
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B22F 3/18
.
by using pressure rollers
B22F 2003/185
. .
{
by hot rolling, below sintering temperature
}
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B22F 3/20
.
by extruding
B22F 2003/202
. .
{
with back pressure
}
B22F 3/204
. .
{
Continuous compaction with axial pressure and without reduction of section
}
B22F 2003/206
. .
{
Hydrostatic or hydraulic extrusion
}
B22F 2003/208
. .
{
Warm or hot extruding
}
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B22F 3/22
.
for producing castings from a slip
B22F 3/222
. .
{
by freeze-casting or in a supercritical fluid
}
B22F 3/225
. .
{
by injection molding
}
[WARNING: Not complete, see also B22F 3/22]
B22F 3/227
. .
{
by organic binder assisted extrusion
}
{
WARNING: Not complete, see also B22F 3/22
}
B22F 3/23
.
involving a self-propagating high-temperature synthesis or reaction sintering step
{
(making cermets by reaction sintering C22C 1/058)
}
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.
After-treatment of workpieces or articles
{
(B22F 3/1146 takes precedence)
}
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B22F 2003/241
. .
{
Chemical after-treatment on the surface
}
B22F 2003/242
. . .
{
Coating
}
B22F 2003/244
. . .
{
Leaching
}
B22F 2003/245
. .
{
Making recesses, grooves etc on the surface by removing material
}
B22F 2003/247
. .
{
Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
}
B22F 2003/248
. .
{
Thermal after-treatment
}
. .
Impregnating
{
(making ferrous alloys by impregnation C22C 33/0242)
}
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Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
B22F 2005/001
.
{
Cutting tools, earth boring or grinding tool other than table ware
}
B22F 2005/002
.
{
Tools other than cutting tools
}
B22F 5/003
.
{
Articles made for being fractured or separated into parts
}
B22F 2005/004
.
{
Article comprising helical form elements (B22F 5/085 takes precedence)
}
B22F 2005/005
.
{
Article surface comprising protrusions
}
B22F 5/006
.
{
of flat products, e.g. sheets (B22F 3/1103 takes precedence; by using pressure rollers only see B22F 3/18)
}
B22F 5/007
.
{
of moulds
}
B22F 5/008
.
{
of engine cylinder parts or of piston parts other than piston rings (of piston rings B22F 5/02)
}
B22F 5/009
.
{
of turbine components other than turbine blades (of turbine blades B22F 5/04)
}
B22F 5/02
.
of piston rings
.
of turbine blades
.
of threaded articles, e.g. nuts
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.
of toothed articles, e.g. gear wheels; of cam discs
B22F 5/085
. .
{
with helical contours
}
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B22F 5/10
.
of articles with cavities or holes, not otherwise provided for in the preceding subgroups
B22F 2005/103
. .
{
Cavity made by removal of insert
}
B22F 5/106
. .
{
Tube or ring forms
}
{
WARNING: Not complete, see also B22F 5/10
}
B22F 5/12
.
of wires
{
(of tubes B22F 5/10)
}
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Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting
{
wherein at least one part is obtained by sintering or compression (application of coating layers by use of metal powders, see C23C)
}
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B22F 7/002
.
{
of porous nature
}
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B22F 7/004
. .
{
comprising at least one non-porous part
}
B22F 7/006
. . .
{
the porous part being obtained by foaming
}
B22F 7/008
.
{
characterised by the composition
}
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B22F 7/02
.
of composite layers
{
(B22F 7/002 takes precedence)
}
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B22F 7/04
. .
with one or more layers not made from powder, e.g. made from solid metal
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B22F 2007/042
. . .
{
characterised by the layer forming method
}
B22F 2007/045
. . . .
{
accompanied by fusion or impregnation
}
B22F 2007/047
. . . .
{
non-pressurised baking of the paste or slurry containing metal powder
}
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.
of composite workpieces or articles from parts, e.g. to form tipped tools
{
(B22F 7/002 takes precedence)
}
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. .
{
involving the connection or repairing of preformed parts
}
B22F 7/064
. . .
{
using an intermediate powder layer
}
B22F 2007/066
. . .
{
using impregnation
}
B22F 2007/068
. . .
{
repairing articles
}
B22F 7/08
. .
with one or more parts not made from powder
{
(B22F 7/062 takes precedence)
}
Manufacture of articles from scrap or waste metal particles
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Making metallic powder or suspensions thereof
B22F 2009/001
.
{
from scrap particles
}
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B22F 9/002
.
{
amorphous or microcrystalline
}
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B22F 9/004
. .
{
by diffusion, e.g. solid state reaction
}
B22F 9/005
. . .
{
Transformation into amorphous state by milling
}
B22F 9/007
. .
{
Transformation of amorphous into microcrystalline state
}
. .
{
Rapid solidification processing
}
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B22F 9/02
.
using physical processes
B22F 9/023
. .
{
Hydrogen absorption
}
B22F 9/026
. .
{
Spray drying of solutions or suspensions
}
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B22F 9/04
. .
starting from solid material, e.g. by crushing, grinding or milling (
{
C22C 1/1084 takes precedence
}
; crushing, grinding or milling, in general, see the relevant subclasses, e.g. B02C)
B22F 2009/041
. . .
{
by mechanical alloying , e.g. blending, milling
}
B22F 2009/042
. . .
{
using a particular milling fluid
}
B22F 2009/043
. . .
{
by ball milling
}
B22F 2009/044
. . .
{
by jet milling
}
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B22F 2009/045
. . .
{
by other means than ball or jet milling
}
B22F 2009/046
. . . .
{
by cutting
}
B22F 2009/047
. . . .
{
by rolling
}
B22F 2009/048
. . .
{
by pulverising a quenched ribbon
}
B22F 2009/049
. . .
{
by pulverising at particular temperature
}
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. .
starting from liquid material
B22F 2009/065
. . .
{
Melting inside a liquid, e.g. making spherical balls
}
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B22F 9/08
. . .
by casting, e.g. through sieves or in water, by atomising or spraying (using electric discharge B22F 9/14)
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B22F 2009/0804
. . . .
{
Dispersion in or on liquid, other than with sieves
}
B22F 2009/0808
. . . . .
{
Mechanical dispersion of melt, e.g. by sieves
}
B22F 2009/0812
. . . . .
{
Pulverisation with a moving liquid coolant stream, by centrifugally rotating stream
}
B22F 2009/0816
. . . .
{
by casting with pressure or pulsating pressure on the metal bath
}
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B22F 9/082
. . . .
{
atomising using a fluid (using centrifugal force B22F 9/10)
}
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B22F 2009/0824
. . . . .
{
with a specific atomising fluid
}
B22F 2009/0828
. . . . . .
{
with water
}
B22F 2009/0832
. . . . .
{
Handling of atomising fluid, e.g. heating, cooling, cleaning, recirculating
}
B22F 2009/0836
. . . . .
{
with electric or magnetic field or induction
}
B22F 2009/084
. . . . .
{
combination of methods
}
B22F 2009/0844
. . . . .
{
in controlled atmosphere
}
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B22F 2009/0848
. . . . .
{
Melting process before atomisation
}
B22F 2009/0852
. . . . . .
{
Electroslag melting
}
B22F 2009/0856
. . . . . .
{
Skull melting
}
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B22F 2009/086
. . . . .
{
Cooling after atomisation
}
B22F 2009/0864
. . . . . .
{
by oil, other non-aqueous fluid or fluid-bed cooling
}
B22F 2009/0868
. . . . . .
{
by injection of solid particles in the melt stream
}
B22F 2009/0872
. . . . . .
{
by water
}
B22F 2009/0876
. . . . . .
{
by gas
}
B22F 2009/088
. . . . .
{
Fluid nozzles , e.g. angle, distance
}
B22F 2009/0884
. . . . .
{
Spiral fluid
}
B22F 2009/0888
. . . . .
{
casting construction of the melt process, apparatus, intermediate reservoir e.g. tundish, devices for temperature control
}
B22F 2009/0892
. . . . .
{
casting nozzle; controlling metal stream in or after the casting nozzle
}
B22F 2009/0896
. . . . .
{
particle transport, separation: process and apparatus
}
B22F 9/10
. . . .
using centrifugal force
. .
starting from gaseous material
B22F 9/14
. .
using electric discharge
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.
using chemical processes
B22F 2009/165
. .
{
Chemical reaction in an Ionic Liquid [IL] (B22F 2009/245 takes precedence)
}
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B22F 9/18
. .
with reduction of metal compounds
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. . .
starting from solid metal compounds
B22F 9/22
. . . .
using gaseous reductors
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B22F 9/24
. . .
starting from liquid metal compounds, e.g. solutions
B22F 2009/245
. . . .
{
Reduction reaction in an Ionic Liquid [IL]
}
B22F 9/26
. . . .
using gaseous reductors
B22F 9/28
. . .
starting from gaseous metal compounds
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B22F 9/30
. .
with decomposition of metal compounds, e.g. by pyrolysis
. . .
{
of metal carbonyls
}
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B22F 2201/00
Treatment under specific atmosphere
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B22F 2201/01
.
Reducing atmosphere
B22F 2201/013
. .
Hydrogen
B22F 2201/016
. .
NH3
B22F 2201/02
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Nitrogen
B22F 2201/03
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Oxygen
B22F 2201/04
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CO or CO2
B22F 2201/05
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Water or water vapour
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Inert gases
B22F 2201/11
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Argon
B22F 2201/12
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Helium
B22F 2201/20
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Use of vacuum
B22F 2201/30
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Carburising atmosphere
B22F 2201/32
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Decarburising atmosphere
B22F 2201/40
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Metal compounds
B22F 2201/50
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air
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Treatment under specific physical conditions
B22F 2202/01
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Use of vibrations
B22F 2202/03
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Treatment under cryogenic or supercritical conditions
B22F 2202/05
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Use of magnetic field
B22F 2202/06
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Use of electric fields
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by induction
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Use of non-gravitational conditions
B22F 2202/11
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Use of irradiation
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Use of plasma
B22F 2202/15
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Use of fluidised beds
B22F 2202/17
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use of centrifugal or vortex forces
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Controlling
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To-be-deleted with administrative transfer to B22F 2203/00
B22F 2203/03
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for feed-back
B22F 2203/05
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thermal expansion
B22F 2203/11
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temperature, temperature profile
B22F 2203/13
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pressure
B22F 2203/15
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weight
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Aspects of the compositions, gradients
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Composition gradients
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of the metallic binder phase in cermets
B22F 2207/05
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eta-phase
B22F 2207/07
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Particles with core-rim gradient
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Gradients other than composition gradients, e.g. size gradients
B22F 2207/13
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Size gradients
B22F 2207/15
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Temperature gradients
B22F 2207/17
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density or porosity gradients
B22F 2207/20
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Cooperating components
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Metallic composition of the powder or its coating
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Light metals
B22F 2301/052
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Aluminium
B22F 2301/054
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Alkali metals, i.e. Li, Na, K, Rb, Cs, Fr
B22F 2301/056
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Alkaline metals, i.e. Ca, Sr, Ba, Ra
B22F 2301/058
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Magnesium
B22F 2301/10
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Copper
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B22F 2301/15
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Nickel or cobalt
B22F 2301/155
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Rare Earth - Co or -Ni intermetallic alloys
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B22F 2301/20
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Refractory metals
B22F 2301/205
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Titanium, zirconium or hafnium
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B22F 2301/25
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Noble metals, i.e. Ag Au, Ir, Os, Pd, Pt, Rh, Ru
B22F 2301/255
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Silver or gold
B22F 2301/30
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Low melting point metals, i.e. Zn, Pb, Sn, Cd, In, Ga
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Iron
B22F 2301/355
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Rare Earth - Fe intermetallic alloys
B22F 2301/40
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Intermetallics other than rare earth-Co or -Ni or -Fe intermetallic alloys
B22F 2301/45
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Rare earth metals, i.e. Sc, Y, Lanthanides (57-71)
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Metal Compound , non-Metallic compound or non-metal composition of the powder or its coating
B22F 2302/05
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Boride
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Carbide
B22F 2302/105
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Silicium carbide (SiC)
B22F 2302/15
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Carbonitride
B22F 2302/20
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Nitride
B22F 2302/205
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Cubic boron nitride
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Oxide
B22F 2302/253
. .
Aluminum oxide (Al2O3)
B22F 2302/256
. .
Silicium oxide (SiO2)
B22F 2302/30
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Oxynitride
B22F 2302/35
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Complex boride, carbide, carbonitride, nitride, oxide or oxynitride
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Carbon, graphite
B22F 2302/403
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Carbon nanotube
B22F 2302/406
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Diamond
B22F 2302/45
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Others, including non-metals
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Functional details of metal or compound in the powder or product,
B22F 2303/01
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Main component
B22F 2303/05
.
Compulsory alloy component
B22F 2303/10
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Optional alloy component
B22F 2303/15
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Intermetallic
B22F 2303/20
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Coating by means of particles
B22F 2303/25
.
Coating by means of fibres
B22F 2303/30
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Coating alloy
B22F 2303/35
.
Molten metal infiltrating a metal preform
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Layer in a composite stack of layers, workpiece or article
B22F 2303/405
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Support layer
B22F 2303/45
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Part of a final mixture to be processed further
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Physical aspects of the powder
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B22F 2304/05
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Submicron size particles
B22F 2304/052
. .
Particle size below 1nm
B22F 2304/054
. .
Particle size between 1 and 100 nm
B22F 2304/056
. .
Particle size above 100 nm up to 300 nm
B22F 2304/058
. .
Particle size above 300 nm up to 1 micrometer
B22F 2304/10
.
Micron size particles, i.e. above 1 micrometer up to 500 micrometer
B22F 2304/15
.
Millimeter size particles, i.e. above 500 micrometer
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B22F 2998/00
Supplementary information concerning processes or compositions relating to powder metallurgy
B22F 2998/10
.
Processes characterised by the sequence of their steps
B22F 2999/00
Aspects linked to processes or compositions used in powder metallurgy
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Last Modified: 10/10/2013