GB923949A - Improvements in methods of producing dispersion-strengthened metal products - Google Patents

Improvements in methods of producing dispersion-strengthened metal products

Info

Publication number
GB923949A
GB923949A GB7727/61A GB772761A GB923949A GB 923949 A GB923949 A GB 923949A GB 7727/61 A GB7727/61 A GB 7727/61A GB 772761 A GB772761 A GB 772761A GB 923949 A GB923949 A GB 923949A
Authority
GB
United Kingdom
Prior art keywords
metal
al2o3
temperature
sintering
phase transformation
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
GB7727/61A
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.)
New England Materials Lab Inc
Original Assignee
New England Materials Lab Inc
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 New England Materials Lab Inc filed Critical New England Materials Lab Inc
Publication of GB923949A publication Critical patent/GB923949A/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
    • 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
    • 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)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Abstract

A dispersion strengthened metal or alloy containing a dispensed refractory oxide phase in a metal which has an elevated temperature phase transformation is produced by compacting and sintering a mixture of the powdered constituents followed by mechanically working the sintered compact at a temperature not exceeding the phase transformation temperature of the metal. The metal constituent may be Fe or Fe base alloys containing solid solutions of at least 50% Fe such as steels; Fe-up to 20% Cr; Fe-up to 4% W; Fe-up to 4% Mo; Fe-up to 10% Ni; Fe-up to 15% Si. In addition the following may form the metal constituent: Co; Co-Mo; Co-Ni-W; Co-Cr-W; Co-Cr-Mo; Ti; Zr; U. The refractory oxides are MgO; SiO2; Al2O3; CaO; BaO; ZrO; BeO; ZrO2; TiO2; ThO2; rare earth oxides, the oxides forming 1-15% by volume of the composition. The grain size of the metal powder ranges up to 20 micron and the oxide grain size from 0.01-0.1 micron. After mixing, the powders may be heated in hydrogen at 700-900 DEG F. and then packed in a rubber tube supported in a perforated steel container. After evacuating the air from the powder hydrostatic compaction is effected at 30,000 p.s.i. Sintering is effected in hydrogen, preferably below the phase transformation temperature of the metal, e.g. for Fe/Al2O3 compositions sintering is at 1525 DEG F. for ten hours. The sintered compacts are packed in a mild steel can and then extruded at a temperature below the metal phase change, e.g. at 1550 DEG F. for Fe/Al2O3. If g Al2O3 is used the working temperature should also preferably be below g -a Al2O3 change point.
GB7727/61A 1960-03-15 1961-03-02 Improvements in methods of producing dispersion-strengthened metal products Expired GB923949A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15036A US3070439A (en) 1960-03-15 1960-03-15 Method for processing dispersion strengthened metals

Publications (1)

Publication Number Publication Date
GB923949A true GB923949A (en) 1963-04-18

Family

ID=21769204

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7727/61A Expired GB923949A (en) 1960-03-15 1961-03-02 Improvements in methods of producing dispersion-strengthened metal products

Country Status (6)

Country Link
US (1) US3070439A (en)
BE (1) BE600659A (en)
CH (1) CH402572A (en)
DK (1) DK107782C (en)
GB (1) GB923949A (en)
SE (1) SE303612B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326677A (en) * 1964-02-18 1967-06-20 Du Pont Process of dispersion-hardening of iron-group base metals

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3139682A (en) * 1960-06-24 1964-07-07 Nicholas J Grant Strength recovery of dispersion hardened alloys
US3142894A (en) * 1962-08-31 1964-08-04 Chrysler Corp Sintered metal article and method of making same
US3388010A (en) * 1965-07-29 1968-06-11 Fansteel Metallurgical Corp Dispersion-hardened metal sheet and process for making same
US3966421A (en) * 1973-06-18 1976-06-29 Bethlehem Steel Corporation Ultra-high strength steel containing CaO, MgO, BaO or SrO having improved resistance to environmental stress corrosion cracking
US7153338B2 (en) * 2003-05-20 2006-12-26 Exxonmobil Research And Engineering Company Advanced erosion resistant oxide cermets
RU2725893C2 (en) * 2014-07-21 2020-07-07 Нуово Пиньоне СРЛ Method of making machine components by additive production

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2855659A (en) * 1954-12-29 1958-10-14 Gen Motors Corp Sintered powdered metal piston ring
US2823988A (en) * 1955-09-15 1958-02-18 Sintercast Corp America Composite matter
US2894838A (en) * 1956-10-11 1959-07-14 Sintercast Corp America Method of introducing hard phases into metallic matrices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3326677A (en) * 1964-02-18 1967-06-20 Du Pont Process of dispersion-hardening of iron-group base metals

Also Published As

Publication number Publication date
DK107782C (en) 1967-07-03
US3070439A (en) 1962-12-25
CH402572A (en) 1965-11-15
BE600659A (en) 1961-06-16
SE303612B (en) 1968-09-02

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