CA2356253A1 - A die lubricant comprising a higher-melting and a lower-melting lubricants - Google Patents

A die lubricant comprising a higher-melting and a lower-melting lubricants Download PDF

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Publication number
CA2356253A1
CA2356253A1 CA002356253A CA2356253A CA2356253A1 CA 2356253 A1 CA2356253 A1 CA 2356253A1 CA 002356253 A CA002356253 A CA 002356253A CA 2356253 A CA2356253 A CA 2356253A CA 2356253 A1 CA2356253 A1 CA 2356253A1
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CA
Canada
Prior art keywords
lubricant
compaction
die
powder
iron
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.)
Granted
Application number
CA002356253A
Other languages
French (fr)
Other versions
CA2356253C (en
Inventor
Shigeru Unami
Yukiko Ozaki
Satoshi Uenosono
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.)
JFE Steel Corp
Original Assignee
Individual
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
Priority claimed from JP30859099A external-priority patent/JP3931503B2/en
Priority claimed from JP2000105050A external-priority patent/JP4507348B2/en
Application filed by Individual filed Critical Individual
Publication of CA2356253A1 publication Critical patent/CA2356253A1/en
Application granted granted Critical
Publication of CA2356253C publication Critical patent/CA2356253C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B22F3/02—Compacting only
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Abstract

A method for producing a high density formed product from an iron-based powd er composition wherein the iron-based powder composition is filled in a mold having a lubricating agent adhered to its surface through electrification an d then formed by pressing the powder composition at a predetermined forming temperature, characterized in that the lubricating agent comprises a lubrica nt having a melting point higher than the forming temperature in an amount of 0 .5 to 80 mass % and a lubricant having a melting point equal to or lower than t he forming temperature in a residual amount; an iron-based powder composition which contains an iron-based powder, a lubricating agent for powder forming and graphite, characterized in that the lubricating agent comprises a lubricant having a melting point higher than the forming temperature in an amount of 10 to 75 mass % and a lubricant having a melting point equal to or lower than the forming temperature in a residual amount and the composition contains the graphite in an amount of 0.5 mass % or less based on the total amount of the composition; and a method for producing a sintered compact comprising sintering the formed product. The method can be employed for producing a formed product having a high density in one pressure forming operation.

Claims (13)

1. A die lubricant for warm compaction with die lubrication, comprising a mixture of a lubricant having a higher melting point than a preset compaction temperature, and a lower melting point than the compaction temperature, the die lubricant for warm compaction with die lubrication being applicable to the surface of a preheated die by means of electrical charging when a powdered material is compacted by pressure compaction.
2. A die lubricant for warm compaction with die lubrication, comprising a lubricant having a higher melting point than a preset compaction temperature and in a content from 0.5 to 80% by mass, and a lower melting point than the compaction temperature and as the balance, the die lubricant for warm compaction with die lubrication being applicable to the surface of a preheated die by means of electrical charging when a powdered material is compacted by pressure compaction.
3. The die lubricant for warm compaction with die lubrication according to claim 2, wherein the higher-melting lubricant is at least one selected from the group consisting of metallic soap, thermoplastic resin, thermoplastic elastomer, and an organic or inorganic lubricant having a lamellar crystal structure.
4. The die lubricant for warm compaction with die lubrication according to claim 2, wherein the lower-melting lubricant is at least one selected from the group consisting of metallic soap, amide wax, polyethylene, and an eutectic mixture of at least two members thereof.
5. An iron-based powder mixture for warm compction with die lubrication, comprising an iron-based powder and a powder compaction lubricant, wherein the powder compaction lubricant comprises a lubricant having a lower melting point than a preset compaction temperature and in a content from 10 to 75% by mass based on the total amount of the powder compaction lubricant, and a lubricant having a higher melting point than the compaction temperature and as the balance.
6. An iron-based powder mixture for warm compaction with die lubrication, comprising an iron-based powder, a powder compaction lubricant and a graphite powder, wherein the powder compaction lubricant comprises a lubricant having a lower melting point than a preset compaction temperature and in a content from 10 to 75% by mass based on the total amount of the powder compaction lubricant, and a lubricant having a higher melting point than the compaction temperature and as the balance, and the content of the graphite powder is less than 0.5% by mass based on the total amount of the iron-based powder mixture.
7. The iron-based powder mixture for warm compaction with die lubrication, wherein the content of the powder compaction lubricant is in the range from 0.05 to 0.40% by mass.
8. A process for the production of a high-density iron-based green compact, comprising the steps of:
preheating a die at a selected temperature; applying a die lubricant for warm compaction with die lubrication to a surface of the die by means of electrical charging;
filling a heated iron-based powder mixture in the die;
and then subjecting the powder mixture to pressure compaction at a preset compaction temperature, wherein the lubricant for warm compaction with die lubrication comprises a lubricant having a higher melting point than the compaction temperature and in a content from 0.5 to 80% by mass, and a lubricant having a lower melting point than the compaction temperature and as the balance; and the iron-based powder mixture comprises an iron-based powder and a powder compaction lubricant, the powder compaction lubricant comprising a lubricant comprising a lubricant having a lower melting point than the compaction temperature and in a content from 10 to 75% by mass based on the total amount of the powder compaction lubricant, and a lubricant having a higher melting point than the compaction temperature and as the balance.
9. A process for the production of a high-density iron-based green compact, comprising the steps of:
preheating a die at a selected temperature; applying a lubricant for warm compaction with die lubrication to the surface of the die by means of electrical charging;
filling a heated iron-based powder mixture into the die;
and then subjecting the powder mixture to pressure compaction at a present compaction temperature, wherein the die lubricant for warm compaction with die lubrication comprises a lubricant having a higher melting point than the compaction temperature and in a content from 0.5 to 80% by mass, and a lubricant having a lower melting point than the compaction temperature and as the balance; and the iron-based powder mixture comprises an iron-based powder, a powder compaction lubricant and a graphite powder, the powder compaction lubricant comprising a lubricant comprising a lubricant having a lower melting point than the compaction temperature and in a content from 10 to 75% by mass based on the total amount of the powder compaction lubricant, and a lubricant having a higher melting point than the compaction temperature and as the balance; and a graphite powder being added in a content less than 0.5% by mass based on the total amount of the iron-based powder mixture.
10. The process according to one of claims 9 and 10, wherein the higher-melting die lubricant is at least one selected from the group consisting of metallic soap, thermoplastic resin, thermoplastic elastomer, and an organic or inorganic lubricant having a lamellar crystal structure.
11. The process according to one of claims 8 and 9, wherein the lower-melting lubricant is at least one selected from the group consisting of metallic soap, amide wax, polyethylene, and an eutectic mixture of at least two members thereof.
12. The process according to any one of claims 8 to 11, wherein the lubricant for warm compaction lubrication is added in a content from 0.05 to 0.40% by mass.
13. A process for the production of a high-density iron-based sintered compact, comprising the step of sintering the high-density iron-based green compact produced by the process according to any one of claims 8 to 12, thereby forming a sintered compact.
CA2356253A 1999-10-29 2000-08-01 A die lubricant comprising a higher-melting and a lower-melting lubricants Expired - Lifetime CA2356253C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP11/308590 1999-10-29
JP30859099A JP3931503B2 (en) 1999-02-05 1999-10-29 Lubricant for warm mold lubrication, high-density iron-based powder molded body, and method for producing high-density iron-based sintered body
JP2000-105050 2000-04-06
JP2000105050A JP4507348B2 (en) 2000-04-06 2000-04-06 High-density iron-based powder molded body and method for producing high-density iron-based sintered body
PCT/JP2000/005089 WO2001032337A1 (en) 1999-10-29 2000-08-01 Lubricating agent for mold at elevated temperature, iron-based powder composition for elevated temperature compaction with lubricated mold and high density formed product from iron-based powder composition, and method for producing high density iron-based sintered compact

Publications (2)

Publication Number Publication Date
CA2356253A1 true CA2356253A1 (en) 2001-05-10
CA2356253C CA2356253C (en) 2010-10-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2356253A Expired - Lifetime CA2356253C (en) 1999-10-29 2000-08-01 A die lubricant comprising a higher-melting and a lower-melting lubricants

Country Status (5)

Country Link
US (1) US6355208B1 (en)
EP (1) EP1145788B1 (en)
CA (1) CA2356253C (en)
TW (1) TW486396B (en)
WO (1) WO2001032337A1 (en)

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ATE337872T1 (en) * 1999-12-14 2006-09-15 Toyota Chuo Kenkyusho Kk PRODUCTION PROCESS FOR POWDER GREEN BODY
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US6464751B2 (en) * 2000-10-06 2002-10-15 Kawasaki Steel Corporation Iron-based powders for powder metallurgy
WO2002083824A1 (en) * 2001-04-16 2002-10-24 Honeywell International, Inc. Composite compositions
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SG111023A1 (en) 2001-07-11 2005-05-30 Inst Data Storage Method and apparatus for decapping integrated circuit packages
SE0103398D0 (en) * 2001-10-12 2001-10-12 Hoeganaes Ab Lubricant powder for powder metallurgy
JP3945455B2 (en) * 2002-07-17 2007-07-18 株式会社豊田中央研究所 Powder molded body, powder molding method, sintered metal body and method for producing the same
SE0203134D0 (en) * 2002-10-22 2002-10-22 Hoeganaes Ab Method of preparing iron-based components
JP2005154828A (en) 2003-11-25 2005-06-16 Mitsubishi Materials Corp Raw material powder for warm compacting, and warm compacting method
JP2010285633A (en) * 2009-06-09 2010-12-24 Kobe Steel Ltd Method of producing powder mixture for powder metallurgy, and method of producing sintered body
EP2564955B1 (en) * 2010-04-28 2015-12-16 IHI Corporation Process for production of electrode to be used in discharge surface treatment
BR112015003454A2 (en) * 2012-08-14 2017-07-04 Nanogestion Inc Techniques for Using Lubricant Compound to Make Powdered Metal Parts
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Also Published As

Publication number Publication date
EP1145788A4 (en) 2003-04-23
EP1145788B1 (en) 2004-12-15
CA2356253C (en) 2010-10-26
US6355208B1 (en) 2002-03-12
EP1145788A1 (en) 2001-10-17
WO2001032337A1 (en) 2001-05-10
TW486396B (en) 2002-05-11

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