GB1362396A - Method of manufacturing billets from powder - Google Patents

Method of manufacturing billets from powder

Info

Publication number
GB1362396A
GB1362396A GB5527071A GB5527071A GB1362396A GB 1362396 A GB1362396 A GB 1362396A GB 5527071 A GB5527071 A GB 5527071A GB 5527071 A GB5527071 A GB 5527071A GB 1362396 A GB1362396 A GB 1362396A
Authority
GB
United Kingdom
Prior art keywords
powder
heating
temperature
degassed
opening
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
GB5527071A
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
Allmanna Svenska Elektriska AB
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 ASEA AB, Allmanna Svenska Elektriska AB filed Critical ASEA AB
Publication of GB1362396A publication Critical patent/GB1362396A/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
    • B22F3/12—Both compacting and sintering
    • B22F3/14—Both compacting and sintering simultaneously
    • B22F3/15—Hot isostatic pressing
    • 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
    • B22F3/1208—Containers or coating used therefor
    • B22F3/1258—Container manufacturing

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)

Abstract

1362396 Powder metallurgy ALLMANNA SVENSKA ELEKTRISKA AB 5 Jan 1972 [2 Aug 1971] 55270/71 Headings C7A and C7D Metallic powder is formed into a billet by enclosing a body of the powder in a container having an evacuating opening, compressing the body and then pre-heating in a pre-heating furnace while it is being degassed with the evacuating opening connected to a vacuum pump. The evacuating opening is then closed and pre-heating is continued until the external surface is near the upper temperature limit allowable for the material used. The body is transferred to a pressure furnace and heating is continued until the interior of the body is above the lower temperature limit for hot compressing to the required final density and the pressure and temperature are maintained to complete the hot pressing. The temperature during the preheating and degassing step may be 300 to 650‹ C. For example a high speed steel containing À85% C, 4% Cr, 6À3% W, 5% Mo, 3À4% V and 8À7% Co may be pre-heated and degassed at 400‹ C under a vacuum of about 1 Torr. When the powder is of a high speed steel of approximate composition 1À25% C, 4% Cr, 6À3% W, 5% Mo, 3À4% V and 8À7% Co the body is isostatically compressed to 4000 bar before heating and degassing, the centre of the powder body is heated to at least 300‹ C before closing the evacuation opening, and the final sintering temperature is 1050‹C-1175‹C.
GB5527071A 1971-08-02 1972-01-05 Method of manufacturing billets from powder Expired GB1362396A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE984571A SE419298B (en) 1971-08-02 1971-08-02 METHOD OF ISOSTATIC HEAT COMPRESSION OF THE POWDER SUBSTANCE

Publications (1)

Publication Number Publication Date
GB1362396A true GB1362396A (en) 1974-08-07

Family

ID=20277640

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5527071A Expired GB1362396A (en) 1971-08-02 1972-01-05 Method of manufacturing billets from powder

Country Status (7)

Country Link
JP (1) JPS5536042B1 (en)
CA (1) CA974098A (en)
DE (1) DE2236799A1 (en)
FR (1) FR2148139B1 (en)
GB (1) GB1362396A (en)
IT (1) IT969529B (en)
SE (1) SE419298B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325006A (en) * 1997-05-08 1998-11-11 Po Hang Iron & Steel High speed tool steel and manufacturing method therefor.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50106844A (en) * 1974-01-31 1975-08-22
SE501390C2 (en) * 1989-06-01 1995-01-30 Abb Stal Ab Method for making a compound tube with a durable outer layer

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450528A (en) * 1968-07-25 1969-06-17 Crucible Steel Corp Method for producing dispersioned hardenable steel
JPS552534B2 (en) * 1974-07-25 1980-01-21
JPS5118202A (en) * 1974-08-05 1976-02-13 Sumitomo Electric Industries HIITOPAI PUNO SEIZOHO

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2325006A (en) * 1997-05-08 1998-11-11 Po Hang Iron & Steel High speed tool steel and manufacturing method therefor.
GB2325006B (en) * 1997-05-08 2001-12-05 Po Hang Iron & Steel High speed tool steel, and manufacturing method therefor

Also Published As

Publication number Publication date
DE2236799A1 (en) 1973-02-22
FR2148139A1 (en) 1973-03-11
JPS5536042B1 (en) 1980-09-18
FR2148139B1 (en) 1979-03-16
IT969529B (en) 1974-04-10
SE419298B (en) 1981-07-27
CA974098A (en) 1975-09-09

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Legal Events

Date Code Title Description
PS Patent sealed
433D Application made for revocation (sect. 33/1949)
433C Case decided by the comptroller ** specification amended (sect. 33/1949)
SP Amendment (slips) printed
PCNP Patent ceased through non-payment of renewal fee