GB1146712A - Improved method of producing nitrogen-containing chromium-steel alloys - Google Patents

Improved method of producing nitrogen-containing chromium-steel alloys

Info

Publication number
GB1146712A
GB1146712A GB23854/66A GB2385466A GB1146712A GB 1146712 A GB1146712 A GB 1146712A GB 23854/66 A GB23854/66 A GB 23854/66A GB 2385466 A GB2385466 A GB 2385466A GB 1146712 A GB1146712 A GB 1146712A
Authority
GB
United Kingdom
Prior art keywords
nitrogen
powder
blocks
steel
alloy
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
GB23854/66A
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Publication of GB1146712A publication Critical patent/GB1146712A/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
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/14—Treatment of metallic powder
    • B22F1/145—Chemical treatment, e.g. passivation or decarburisation
    • 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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/24—Nitriding
    • C23C8/26—Nitriding of ferrous surfaces

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Powder Metallurgy (AREA)

Abstract

1,146,712. Making alloy steel; powder metallurgy. MANNESMANN A. G. May 27, 1966 [June 2, 1965], No. 23854/66. Headings C7A, C7D and C7U. A chromium-containing steel alloy powder, or a compact produced therefrom by pressing or rolling, is heat-treated at sub-atmospheric pressure and a temperature above 1100‹C., preferably in the range 1150‹ - -1200‹C., and is then immediately annealed in a nitrogen-containing atmosphere at a temperature in the range 800‹ - 1100‹C. and preferably at atmospheric pressure. The powder or compact may then be compacted by rolling or pressing at 1000‹-1200‹C. to produce a high-nitrogen alloy. In a particular embodiment, an 18/8 steel having a stoichrometric ratio of carbon-oxygen were atomized by water under pressure, and the powder pressed into blocks at 2 metric tons per sq. cm. The blocks were annealed for eight hours at 1150‹C. at reduced pressure to remove carbon and oxygen, after which the furnace temperature was reduced and nitrogen introduced. After twenty minutes the blocks had a uniform nitrogen content of 8%; they were then heated in the nitrogen atmosphere to 1150‹ C. and extruded into tubes. In another example the following compositions were obtained by heating the steels in nitrogen for three hours at 950‹ C. %C % Si % Mn % Cr % Ni % N 0À12 1À52 0À38 18À0 9À9 2À3 0À11 1À55 0À26 12À1 - 1À6 0À15 1À68 0À61 17À3 - 2À5
GB23854/66A 1965-06-02 1966-05-27 Improved method of producing nitrogen-containing chromium-steel alloys Expired GB1146712A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM0065428 1965-06-02

Publications (1)

Publication Number Publication Date
GB1146712A true GB1146712A (en) 1969-03-26

Family

ID=7311446

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23854/66A Expired GB1146712A (en) 1965-06-02 1966-05-27 Improved method of producing nitrogen-containing chromium-steel alloys

Country Status (3)

Country Link
US (1) US3357827A (en)
BE (1) BE681925A (en)
GB (1) GB1146712A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2082749A5 (en) * 1970-03-25 1971-12-10 Allegheny Ludlum Steel Steel powder internally reinforced with a - dispersion of metallic nitride particles

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3804678A (en) * 1968-06-07 1974-04-16 Allegheny Ludlum Ind Inc Stainless steel by internal nitridation
US3663312A (en) * 1970-03-09 1972-05-16 Allegheny Ludlum Steel Nitride-strengthened, stainless steel
JPS4923989B1 (en) * 1970-12-26 1974-06-19
US3795404A (en) * 1972-05-02 1974-03-05 Nippon Tungsten Sealing of mechanical seal and manufacture thereof
JPS5442330B2 (en) * 1973-09-01 1979-12-13
SE526454C2 (en) * 2002-10-11 2005-09-20 Korrosions Och Metallforskning Process and plant for the production of iron and steel powders via nitride and the use of powders produced by the process
CN105618775A (en) * 2016-04-11 2016-06-01 西安欧中材料科技有限公司 Method for preparing Ti-6Al-7Nb medical titanium alloy spherical powder
CN110142409B (en) * 2019-06-25 2024-05-14 华北理工大学 Method for preparing nitrogen-containing alloy by high-pressure selective laser melting

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2933386A (en) * 1956-08-01 1960-04-19 Rca Corp Method of sintering and nitriding ferrous bodies
US2994600A (en) * 1958-09-01 1961-08-01 Hansen Friedrich Iron powder for making sintered iron articles
US2989429A (en) * 1959-03-11 1961-06-20 Armco Steel Corp Method of making manganese-nitrogen pre-alloy
DE1209409B (en) * 1959-12-24 1966-01-20 Deutsche Edelstahlwerke Ag Hot press mold
US3161949A (en) * 1963-02-21 1964-12-22 Gen Telephone & Elect Refractory metal base alloys and method of making same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2082749A5 (en) * 1970-03-25 1971-12-10 Allegheny Ludlum Steel Steel powder internally reinforced with a - dispersion of metallic nitride particles

Also Published As

Publication number Publication date
US3357827A (en) 1967-12-12
BE681925A (en) 1966-11-14

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