GB1318902A - Method of making high-density sintered chromium-bearing articles - Google Patents

Method of making high-density sintered chromium-bearing articles

Info

Publication number
GB1318902A
GB1318902A GB4880170A GB4880170A GB1318902A GB 1318902 A GB1318902 A GB 1318902A GB 4880170 A GB4880170 A GB 4880170A GB 4880170 A GB4880170 A GB 4880170A GB 1318902 A GB1318902 A GB 1318902A
Authority
GB
United Kingdom
Prior art keywords
mixture
powder
sintered
oct
making high
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
GB4880170A
Inventor
H R Mccurdy
D W Rausch
H O Mcintire
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.)
Battelle Development Corp
Original Assignee
Battelle Development 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 Battelle Development Corp filed Critical Battelle Development Corp
Publication of GB1318902A publication Critical patent/GB1318902A/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
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
    • 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
    • C22C33/0235—Starting from compounds, e.g. oxides

Abstract

1318902 Powder metallurgy BATTELLE DEVELOPMENT CORP 14 Oct 1970 [15 Oct 1969] 48801/70 Heading C7D A Cr containing sintered body e.g. Cr or Cr- Ni steel is made from a powder mixture of Fe- Cr and reducible metal compounds at least 35% of the mixture having a particle size < 10 microns. The mixture is compacted or slip cast, heated in a reducing atmosphere e.g. H 2 and/or Co and then sintered. The total metal powder content of the mixture is preferably <50% volume and the compounds included are the oxides of Fe, Mo, Ni, which are preferably formed by spray drying. The powder mixture which may also include Mo, Fe/Si and Fe/Mn is preferably <1 micron and is formed by ball milling. Binders such as starch are added and after compaction, preferably extrusion, the compacts are reduced in H 2 and/or CO at 930-1200‹ F. and sintered at 1830-2450‹ F. to form wires or tubes of Type 300 or 400 stainless steels.
GB4880170A 1969-10-15 1970-10-14 Method of making high-density sintered chromium-bearing articles Expired GB1318902A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86674069A 1969-10-15 1969-10-15

Publications (1)

Publication Number Publication Date
GB1318902A true GB1318902A (en) 1973-05-31

Family

ID=25348301

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4880170A Expired GB1318902A (en) 1969-10-15 1970-10-14 Method of making high-density sintered chromium-bearing articles

Country Status (8)

Country Link
US (1) US3677749A (en)
JP (1) JPS4923963B1 (en)
CA (1) CA927150A (en)
DE (1) DE2050194A1 (en)
FR (1) FR2065977A5 (en)
GB (1) GB1318902A (en)
SE (1) SE373878B (en)
ZA (1) ZA706590B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1124976A (en) * 1977-03-23 1982-06-08 Alfred R. E. Singer Manufacture of elongate workpiece from pelleted material
DE502006008730D1 (en) * 2006-12-01 2011-02-24 Ruthner Michael Johann Process for producing iron powder or steel powder from iron oxide powder by oxidation and reduction
US8734715B2 (en) 2011-01-13 2014-05-27 Ut-Battelle, Llc Method for the preparation of ferrous low carbon porous material
CN115522083B (en) * 2022-10-12 2023-09-22 嘉峪关宏电铁合金有限责任公司 Method for reducing crushing difficulty of high-carbon ferrochrome

Also Published As

Publication number Publication date
CA927150A (en) 1973-05-29
FR2065977A5 (en) 1971-08-06
ZA706590B (en) 1971-05-27
US3677749A (en) 1972-07-18
DE2050194A1 (en) 1971-04-29
SE373878B (en) 1975-02-17
JPS4923963B1 (en) 1974-06-19

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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