GB1348809A - Smooth high tolerance porous tube and process for making - Google Patents

Smooth high tolerance porous tube and process for making

Info

Publication number
GB1348809A
GB1348809A GB1998171*[A GB1348809DA GB1348809A GB 1348809 A GB1348809 A GB 1348809A GB 1348809D A GB1348809D A GB 1348809DA GB 1348809 A GB1348809 A GB 1348809A
Authority
GB
United Kingdom
Prior art keywords
powder
tube
nickel
size
filters
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1998171*[A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of GB1348809A publication Critical patent/GB1348809A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/11—Making porous workpieces or articles
    • B22F3/1103—Making porous workpieces or articles with particular physical characteristics
    • B22F3/1109—Inhomogenous pore distribution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2027—Metallic material
    • B01D39/2031—Metallic material the material being particulate
    • B01D39/2034—Metallic material the material being particulate sintered or bonded by inorganic agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/14—Making tubes from double flat material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/17—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging
    • B22F3/172—Continuous compaction, e.g. rotary hammering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Filtering Materials (AREA)

Abstract

1348809 Coating apparatus MINNESOTA MINING & MFG CO 10 June 1971 19981/71 Heading B2L [Also in Divisions B3 C6-C7 and F2] A porous metal tube of sintered metallic powder has its outer surface finished and dimensioned by rotary swaging or rolling which does'not smear the powder as in grinding or machining and thus a substantial part of the porosity is retained. The tube is worked without a mandrel so that its inner surface remains rough. Such tubes may be plugged at one end and used as frictionless air turns, as film decurling bars, as web or film coaters, as air clamps or air bearings for handling fibres and textiles, for applying lubicant to yarn after spinning, or as filters, flow restrictors and diffusers. The powder is chromium-nickel stainless steel of the 300 series, nickel, iron, cobalt, copper, bronze, brass, nickel-copper, titanium, zirconium, niobium, tantalum and their alloys or aluminium. For filters the powder size is in the range 40-800 microns. Blends of different powder sizes may be used. An organic binder of methyl cellulose and water or glycerin solvent are used. The mixed slurry is extruded and in the case of stainless steel sintered in a hydrogen or dissociated ammonia atmosphere at 1200-1400‹C for 2 to 3 hours. The rotary swaging is conventional and may be in two or more stages with intermediate annealing. The rolling is performed by three rollers which rotate the tube about its axis and are gradually advanced axially. Many examples are given of powder size, tube size, sintering temperature and time within the above ranges.
GB1998171*[A 1969-08-28 1971-06-10 Smooth high tolerance porous tube and process for making Expired GB1348809A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85397269A 1969-08-28 1969-08-28

Publications (1)

Publication Number Publication Date
GB1348809A true GB1348809A (en) 1974-03-27

Family

ID=25317394

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1998171*[A Expired GB1348809A (en) 1969-08-28 1971-06-10 Smooth high tolerance porous tube and process for making

Country Status (5)

Country Link
US (1) US3626744A (en)
CA (1) CA982063A (en)
DE (1) DE2134562A1 (en)
FR (1) FR2146097B1 (en)
GB (1) GB1348809A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190035A2 (en) * 1985-02-01 1986-08-06 Pall Corporation Method of making a porous metal article and articles produced by the method
US4822692A (en) * 1985-02-01 1989-04-18 Pall Corporation Seamless porous metal article and method of making

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6596100B2 (en) * 2000-10-03 2003-07-22 Ngk Insulators, Ltd. Metal-made seamless pipe and process for production thereof
CN1151539C (en) * 2000-10-03 2004-05-26 日本碍子株式会社 Seamless metal pipe and its production method
DE10152581A1 (en) * 2001-10-24 2003-05-08 Mann & Hummel Filter Pipe for conducting air or other gaseous media, in particular, for motor vehicles is made of a sintered material
CN102836997A (en) * 2011-06-22 2012-12-26 烟台龙源电力技术股份有限公司 Metal powder sintered porous body and preparation method thereof
CN103861888B (en) * 2014-03-20 2015-11-18 北京科技大学 A kind of preparation method of high-performance copper/composite ti pipe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0190035A2 (en) * 1985-02-01 1986-08-06 Pall Corporation Method of making a porous metal article and articles produced by the method
EP0190035A3 (en) * 1985-02-01 1986-11-26 Pall Corporation Method of making a porous metal article and articles produced by the method
US4822692A (en) * 1985-02-01 1989-04-18 Pall Corporation Seamless porous metal article and method of making
US4828930A (en) * 1985-02-01 1989-05-09 Pall Corporation Seamless porous metal article and method of making

Also Published As

Publication number Publication date
FR2146097A1 (en) 1973-03-02
DE2134562A1 (en) 1973-01-25
US3626744A (en) 1971-12-14
FR2146097B1 (en) 1975-07-11
CA982063A (en) 1976-01-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee