US2031904A - Machine parts and apparatus intended for high temperature operation - Google Patents

Machine parts and apparatus intended for high temperature operation Download PDF

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Publication number
US2031904A
US2031904A US536940A US53694031A US2031904A US 2031904 A US2031904 A US 2031904A US 536940 A US536940 A US 536940A US 53694031 A US53694031 A US 53694031A US 2031904 A US2031904 A US 2031904A
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US
United States
Prior art keywords
molybdenum
chromium
centrifugal casting
machine parts
high temperature
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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 - Lifetime
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US536940A
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English (en)
Inventor
Rittershausen Fritz
Korschan Heinz
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.)
Krupp Stahl AG
Fried Krupp AG
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Krupp Stahl 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 Krupp Stahl AG filed Critical Krupp Stahl AG
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Publication of US2031904A publication Critical patent/US2031904A/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten

Definitions

  • This invention relates to machine parts and apparatus intended for operation upon metals heated to a high temperature, which causes the machine parts to be subjected in use to considerable variations in temperature.
  • machine parts are centrifugal casting moulds, and matrices, swaging sockets, rollers, pressing plungers and dies for use at high temperatures.
  • chromium nickel or chromium molybdenum steel alloys of somewhat the following composition have hitherto been regarded as the most suitable materials:
  • Chromium-nickel steel alloys containing about 0.3% carbon, about 1.5 to 2% nickel and about 0.5 to 1% chromium, and.
  • Chromium-molybdenum steel alloys containing about 0.3% carbon, about 1.0 to 1.3% chromium and about 0.35% molybdenum.
  • centrifugal casting moulds can be increased up to 100% if they are made of steel alloys which contain up to about 0.3% carbon, more than about 2.1% chromium, more than about 0.15% molybdenum with or without an amount of nickel up to about 2%. Some or all of the molybdenum may be replaced by about twice as much tungsten.
  • the improvement in the durability of the centrifugal casting moulds is believed to be due to the fact that on account of the increased chr0- mium and reduced carbon content the occurrence on the surface of a network of cracks due to stresses set up by heat is retarded and reduced.
  • the occurrence of these cracks in existing centrifugal casting moulds is a source of anxiety.
  • the improvement is believed to be also due to the fact that even after the formation of the cracks they are practically prevented from spreading and enlarging themselves by virtue of the substantially higher yield point due to the higher chromium content and the addition of molybdenum. It is found that particularly durable centrifugal casting moulds can be produced if the moulds'during the process for improving their properties, i. e.
  • a steel alloy may be mentioned which contains about 0.16% carbon, about 2.4% chromium and 0.38% molybdenum with or without an amount of nickel up to about 0.5%.
  • the addition of molybdenum can be replaced by an addition of tungsten twice as large, 1. e. by about 0.76% tungsten; it is also found to be advantageous to add up to about 0.4% vanadium for the purpose of further increasing the yield point.
  • the steel alloys mentioned above are not only suitable for the production of centrifugal casting moulds but also for the production of all those machine parts or apparatus which have to work at high temperatures and aresubjected to considerable temperature variations, that is to say for the production of such articles as pressing matrices, swaging sockets, rollers, pressing plungers and pressing dies for use at high temperatures.
  • a steel alloy which contains about 0.21% carbon, about 2.53% chromium, about 0.42% molybdenum and about 0.28% vanadium.
  • a steel alloy is particularly suitable for example which contains about 0.28% carv bon, about 2.01% chromium, about 1.08% nickel and about 0.48% molybdenum.
  • centrifugal casting mould made from a steel alloy containingabout, 0.16% carbon, about 2.4% chromium, about 0.38% molybdenumand up to about 0.5% nickel. 5.
  • a centrifugal casting mould composed of a steel alloy containing up to about 0.3% of car-,
  • a centrifugal casting mould composed of a steel alloy containing up to about 0.3% of carbon
  • a centrifugal casting mould composed of a steel alloy containing up to about 0.3% carbon, about 2.1 to 4.5% of chromium, about 0.15 to 0.8%

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Forging (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
US536940A 1930-06-06 1931-05-12 Machine parts and apparatus intended for high temperature operation Expired - Lifetime US2031904A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2031904X 1930-06-06

Publications (1)

Publication Number Publication Date
US2031904A true US2031904A (en) 1936-02-25

Family

ID=7981801

Family Applications (1)

Application Number Title Priority Date Filing Date
US536940A Expired - Lifetime US2031904A (en) 1930-06-06 1931-05-12 Machine parts and apparatus intended for high temperature operation

Country Status (4)

Country Link
US (1) US2031904A (de)
AT (1) AT134828B (de)
CH (1) CH158001A (de)
GB (1) GB371633A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3254991A (en) * 1962-06-29 1966-06-07 Republic Steel Corp Steel alloy and method of making same
US4216014A (en) * 1977-11-22 1980-08-05 Kawasaki Jukogyo Kabushiki Kaisha Low temperature steel alloy
WO2004067783A2 (en) 2003-01-24 2004-08-12 Ellwood National Forge Company Eglin steel - a low alloy high strength composition

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746189C (de) * 1938-08-06 1944-06-08 Stahlschmidt & Co Kom Ges Stahllegierung fuer Warmverarbeitungswerkzeuge
DE898316C (de) * 1938-12-07 1953-11-30 Boehler & Co Ag Geb Warmarbeitswerkzeuge
US2576229A (en) * 1941-03-12 1951-11-27 Boehler & Co Ag Geb Steel for tools operating at elevated temperatures
DE952820C (de) * 1941-03-13 1956-11-22 Boehler & Co Ag Geb Chrom-Vanadin-Wolfram-Molybdaen-Stahllegierungen fuer Warmarbeitswerkzeuge, insbesondere Pressmatrizen
US2895861A (en) * 1957-05-28 1959-07-21 Creusot Forges Ateliers Process for improving stress corrosion cracking resistance of alloyed steel in hydrogen sulphide atmosphere
US4919735A (en) * 1988-12-29 1990-04-24 National Forge Company Khare pipe mold steel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3254991A (en) * 1962-06-29 1966-06-07 Republic Steel Corp Steel alloy and method of making same
US4216014A (en) * 1977-11-22 1980-08-05 Kawasaki Jukogyo Kabushiki Kaisha Low temperature steel alloy
WO2004067783A2 (en) 2003-01-24 2004-08-12 Ellwood National Forge Company Eglin steel - a low alloy high strength composition
US20040250931A1 (en) * 2003-01-24 2004-12-16 Ellwood National Forge Company Eglin steel - a low alloy high strength composition
EP1594997A4 (de) * 2003-01-24 2006-11-02 Ellwood Nat Forge Company eglin stahl- eine niedriglegierte hochfeste zusammensetzung
US7537727B2 (en) 2003-01-24 2009-05-26 Ellwood National Forge Company Eglin steel—a low alloy high strength composition

Also Published As

Publication number Publication date
CH158001A (de) 1932-10-31
GB371633A (en) 1932-04-28
AT134828B (de) 1933-10-10

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