B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
  
SHAPING
 B22
CASTING; POWDER METALLURGY
 B22F
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)
 B22F

Note(s)

  1. 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.
  2. The production of metal powder is classified in this subclass insofar as the invention relates to the preparation of powder with specific physical characteristics. [3]
 B22F 1/00
Special treatment of metallic powder, e.g. to facilitate working, to improve properties; Metallic powders per se, e.g. mixtures of particles of different composition (C04, C08 take precedence)
 B22F 1/02
·  comprising coating of the powder  [2]
 B22F 3/00
Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor
 B22F 3/02
·  Compacting only
 B22F 3/04
·  ·  by applying fluid pressure
 B22F 3/06
·  ·  by centrifugal forces
 B22F 3/08
·  ·  by explosive forces
 B22F 3/10
·  Sintering only, e.g. making porous workpieces
 B22F 3/12
·  Both compacting and sintering
 B22F 3/14
·  ·  simultaneously
 B22F 3/16
·  ·  in successive or repeated steps
 B22F 3/18
·  for producing sheet material by making use of pressure rollers
 B22F 3/20
·  for producing extruded rod stock
 B22F 3/22
·  for producing castings from a slip
 B22F 3/24
·  After-treatment of workpieces or articles
 B22F 3/26
·  ·  Impregnating
 B22F 5/00
Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
 B22F 5/02
·  of piston rings
 B22F 5/04
·  of turbine blades
 B22F 5/06
·  of threaded articles, e.g. nuts
 B22F 5/08
·  of toothed articles, e.g. gear wheels; of cam discs
 B22F 7/00
Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting
 B22F 7/02
·  of composite layers
 B22F 7/04
·  ·  with one or more layers not made from powder, e.g. made from solid metal
 B22F 7/06
·  of composite workpieces or articles from parts, e.g. to form tipped tools
 B22F 7/08
·  ·  with one or more parts not made from powder
 B22F 9/00
Making metallic powder or suspensions thereof
 B22F 9/02
·  using physical processes  [3]
 B22F 9/04
·  ·  starting from solid material, e.g. by crushing, grinding or milling (crushing, grinding or milling, in general, see the relevant subclasses, e.g. B02C)  [3]
 B22F 9/06
·  ·  starting from liquid material  [3]
 B22F 9/08
·  ·  ·  by casting, e.g. through sieves or in water, by atomising or spraying (using electric discharge B22F 9/14)  [3]
 B22F 9/10
·  ·  ·  ·  using centrifugal force  [3]
 B22F 9/12
·  ·  starting from gaseous material  [3]
 B22F 9/14
·  ·  using electric discharge  [3]
 B22F 9/16
·  using chemical processes  [3]
 B22F 9/18
·  ·  with reduction of metal compounds  [3]
 B22F 9/20
·  ·  ·  starting from solid metal compounds  [3]
 B22F 9/22
·  ·  ·  ·  using gaseous reductors  [3]
 B22F 9/24
·  ·  ·  starting from liquid metal compounds, e.g. solutions  [3]
 B22F 9/26
·  ·  ·  ·  using gaseous reductors  [3]
 B22F 9/28
·  ·  ·  starting from gaseous metal compounds  [3]
 B22F 9/30
·  ·  with decomposition of metal compounds, e.g. by pyrolysis  [3]