GB1325248A - Powder metal magnetic pole piece - Google Patents

Powder metal magnetic pole piece

Info

Publication number
GB1325248A
GB1325248A GB5869871A GB5869871A GB1325248A GB 1325248 A GB1325248 A GB 1325248A GB 5869871 A GB5869871 A GB 5869871A GB 5869871 A GB5869871 A GB 5869871A GB 1325248 A GB1325248 A GB 1325248A
Authority
GB
United Kingdom
Prior art keywords
powder
magnetic pole
hot
dec
pressed
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
GB5869871A
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.)
Chromalloy American Corp
Original Assignee
Chromalloy American Corp
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 Chromalloy American Corp filed Critical Chromalloy American Corp
Publication of GB1325248A publication Critical patent/GB1325248A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
    • C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
    • 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
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
    • C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
    • C22C32/0026—Matrix based on Ni, Co, Cr or alloys thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S75/00—Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
    • Y10S75/95—Consolidated metal powder compositions of >95% theoretical density, e.g. wrought
    • Y10S75/951—Oxide containing, e.g. dispersion strengthened

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)

Abstract

1325248 Powder metallurgical preparation of alloys CHROMALLOY AMERICAN CORP 17 Dec 1971 [29 Dec 1970] 58698/71 Heading C7A and C7D A magnetically soft alloy, for use in magnetic pole pieces in rubbing contact with moving magnetic playback tape of gamma iron oxide, is made by vacuum hot consolidating a powder of an alloy comprising - the balance being Fe, having a particle size of between 5 microns and 325 mesh (US standard sieve size), the powder having a surface oxide layer produced by pre-oxidation in air at 450-650‹F for long enough for the powder to absorb 2000-8000 ppm. by weight, of oxygen. The powder may be directly hot pressed or cold compacted and then hot-pressed, the pressing temperature may be 1000-1100‹C and the pressure may be 12, 000-20, 000 psi. Examples refer to the use of atomized powders and graphite liners in the pressing die.
GB5869871A 1970-12-29 1971-12-17 Powder metal magnetic pole piece Expired GB1325248A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10236470A 1970-12-29 1970-12-29

Publications (1)

Publication Number Publication Date
GB1325248A true GB1325248A (en) 1973-08-01

Family

ID=22289456

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5869871A Expired GB1325248A (en) 1970-12-29 1971-12-17 Powder metal magnetic pole piece

Country Status (6)

Country Link
US (1) US3739445A (en)
CH (1) CH560956A5 (en)
DE (1) DE2165098C3 (en)
FR (1) FR2120843A5 (en)
GB (1) GB1325248A (en)
IT (1) IT941057B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2159835A (en) * 1984-06-05 1985-12-11 Cabot Corp Silicon-rich alloy coatings
CN107866570A (en) * 2017-12-15 2018-04-03 东北大学 A kind of equipment for powder metallurgy warm pressing formation

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5638671B2 (en) * 1972-11-16 1981-09-08
SE376552B (en) * 1973-09-26 1975-06-02 Hoeganaes Ab
JPS5210819A (en) * 1975-06-12 1977-01-27 Kiyoshi Inoue Malleable high permeability alloy for high frequency
JPS5271311A (en) * 1975-12-11 1977-06-14 Nippon Musical Instruments Mfg Method of producing ironnsiliconnaluminium alloy
US4069043A (en) * 1976-01-19 1978-01-17 Carpenter Technology Corporation Wear-resistant shaped magnetic article and process for making the same
US4029501A (en) * 1976-01-26 1977-06-14 Rca Corporation Method of preparing improved magnetic head material
JPS5852554B2 (en) * 1976-10-07 1983-11-24 潔 井上 Malleable high permeability alloy for high frequency
JPS54121108A (en) * 1978-03-13 1979-09-20 Akai Electric Mnnzn ferrite monocrystal magnetic head and method of fabricating same
US4532737A (en) * 1982-12-16 1985-08-06 Rca Corporation Method for lapping diamond
EP0378160B1 (en) * 1989-01-10 1994-11-23 Matsushita Electric Industrial Co., Ltd. Magnetic head and method of producing the same
EP0406580B1 (en) * 1989-06-09 1996-09-04 Matsushita Electric Industrial Co., Ltd. A composite material and a method for producing the same
EP0401835B1 (en) * 1989-06-09 1997-08-13 Matsushita Electric Industrial Co., Ltd. A magnetic material
US20130160492A1 (en) * 2011-12-23 2013-06-27 Guillermo R Villalobos Polished, hot pressed, net shape ceramics
JP6424754B2 (en) * 2015-07-10 2018-11-21 トヨタ自動車株式会社 Method of manufacturing molded body
WO2018037356A1 (en) 2016-08-23 2018-03-01 Medicem Ophthalmic (Cy) Limited Ophthalmic lenses with aspheric optical surfaces and method for their manufacture

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3661570A (en) * 1970-04-03 1972-05-09 Rca Corp Magnetic head material method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2159835A (en) * 1984-06-05 1985-12-11 Cabot Corp Silicon-rich alloy coatings
GB2159835B (en) * 1984-06-05 1989-06-01 Cabot Corp Silicon-rich alloy coatings
CN107866570A (en) * 2017-12-15 2018-04-03 东北大学 A kind of equipment for powder metallurgy warm pressing formation

Also Published As

Publication number Publication date
IT941057B (en) 1973-03-01
US3739445A (en) 1973-06-19
DE2165098A1 (en) 1972-07-06
FR2120843A5 (en) 1972-08-18
DE2165098B2 (en) 1975-04-10
CH560956A5 (en) 1975-04-15
DE2165098C3 (en) 1975-11-20

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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