DE489432C - Steel alloy containing chromium, nickel and molybdenum for rolling mandrels - Google Patents

Steel alloy containing chromium, nickel and molybdenum for rolling mandrels

Info

Publication number
DE489432C
DE489432C DER64021D DER0064021D DE489432C DE 489432 C DE489432 C DE 489432C DE R64021 D DER64021 D DE R64021D DE R0064021 D DER0064021 D DE R0064021D DE 489432 C DE489432 C DE 489432C
Authority
DE
Germany
Prior art keywords
nickel
molybdenum
steel alloy
alloy containing
containing chromium
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
DER64021D
Other languages
German (de)
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.)
ABT STAHLWERK KRIEGER
RHEINISCH WESTFAELISCHE STAHL
Original Assignee
ABT STAHLWERK KRIEGER
RHEINISCH WESTFAELISCHE STAHL
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 ABT STAHLWERK KRIEGER, RHEINISCH WESTFAELISCHE STAHL filed Critical ABT STAHLWERK KRIEGER
Priority to DER64021D priority Critical patent/DE489432C/en
Application granted granted Critical
Publication of DE489432C publication Critical patent/DE489432C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B25/00—Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor ; Construction of, or alloys for, mandrels or plugs
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Extrusion Of Metal (AREA)

Description

Chrom, Nickel und lilolybdän enthaltende Stahllegierung für Walzdorne Es sind Stahllegierungen bekannt, welche unter anderem Chrom, Nickel und Molybdän enthalten; bekannt ist auch, daß diese Legierungen hohe Wärmefestigkeit besitzen. Die Erfindung betrifft die Verwendung einer besonders zusammengesetzten Stahllegierung dieser Art für Walzdorne. Die Walzdorne werden nämlich bei ihrer Benutzung bis zur Rotglut erhitzt und unterliegen in diesem Zustande einem starken Verschleiß durch Reibung, so daß sie bisher jeweils nach dem Auswalzen weniger Blöcke ausgewechselt werden mußten.Steel alloy containing chromium, nickel and lilolybdenum for rolling mandrels Steel alloys are known which include chromium, nickel and molybdenum, among others contain; It is also known that these alloys have high heat resistance. The invention relates to the use of a specially composed steel alloy of this type for rolling mandrels. The rolling mandrels are namely in their use up to Red heat heats up and is subject to severe wear and tear in this state Friction, so that so far fewer blocks have been replaced after each rolling had to be.

Nach der Erfindung wird für die Walzdorne eine Stahllegierung benutzt, die neben den üblichen, möglichst geringen Beimischungen von Phosphor und Schwefel etwa die folgende Zusammensetzung hat 0,33 °/o C, o,16 °/o Si, o,2o °/o Mn, 0,46 °/o Cr, 1,69 % Mo, 4,18 °/o Ni.According to the invention, a steel alloy is used for the rolling mandrels which, in addition to the customary, as low as possible, admixtures of phosphorus and sulfur has approximately the following composition: 0.33 ° / o C, 0.16 ° / o Si, 0.2 ° / o Mn, 0.46% Cr, 1.69% Mo, 4.18% Ni.

Die Legierung kann in normaler Schmelzung im Elektroofen, Tiegelofen oder Spezial-Martinofen hergestellt werden. Geringe Abweichungen der oben angegebenen Gehalten sind bei der Herstellung im großen natürlich, unvermeidlich; sie beeinflussen aber die Eigenschaften der Legierung nicht in wesentlichem Maße.The alloy can be melted normally in an electric furnace, crucible furnace or special Martin oven. Slight deviations from the above Holdings are natural, unavoidable, in large-scale production; they affect but the properties of the alloy are not to a significant extent.

Durch praktische Erprobung wurde eine fünfzigfache Lebensdauer der Walzdorne bei gleicher Beanspruchung festgestellt, die Erhöhung der Widerstandsfähigkeit gegen Verschleiß .ist somit überraschend hoch.Practical testing has shown that the Rolling mandrels found the increase in resistance under the same load against wear. is therefore surprisingly high.

Claims (1)

PATENTANSPRUCH: Chrom, Nickel und Molybdän enthaltende Stahllegierung für Walzdorne, dadurch gekennzeichnet, daß sie neben den üblichen, möglichst geringen Beimischungen von Phosphor und Schwefel etwa die folgende Zusammensetzung hat: 0,33 C, o,16 Si, o,2o Mn, o,46 Cr, 1,69 Mo, 4,18 Ni.PATENT CLAIM: Steel alloy containing chromium, nickel and molybdenum for rolling mandrels, characterized in that, in addition to the usual, minimal admixtures of phosphorus and sulfur, it has approximately the following composition: 0.33 C, 0.16 Si, 0.2o Mn, o , 46 Cr, 1.69 Mo, 4.18 Ni.
DER64021D 1925-04-12 1925-04-12 Steel alloy containing chromium, nickel and molybdenum for rolling mandrels Expired DE489432C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER64021D DE489432C (en) 1925-04-12 1925-04-12 Steel alloy containing chromium, nickel and molybdenum for rolling mandrels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER64021D DE489432C (en) 1925-04-12 1925-04-12 Steel alloy containing chromium, nickel and molybdenum for rolling mandrels

Publications (1)

Publication Number Publication Date
DE489432C true DE489432C (en) 1930-01-17

Family

ID=7412300

Family Applications (1)

Application Number Title Priority Date Filing Date
DER64021D Expired DE489432C (en) 1925-04-12 1925-04-12 Steel alloy containing chromium, nickel and molybdenum for rolling mandrels

Country Status (1)

Country Link
DE (1) DE489432C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0385439A1 (en) * 1989-02-28 1990-09-05 Nkk Corporation Plug for manufacturing seamless steel pipe
DE102007037736A1 (en) 2007-08-09 2009-04-23 Kocks Technik Gmbh & Co. Kg Mandrel or mandrel bar for manufacture of copper pipes is fabricated of 75 per cent or more molybdenum

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0385439A1 (en) * 1989-02-28 1990-09-05 Nkk Corporation Plug for manufacturing seamless steel pipe
DE102007037736A1 (en) 2007-08-09 2009-04-23 Kocks Technik Gmbh & Co. Kg Mandrel or mandrel bar for manufacture of copper pipes is fabricated of 75 per cent or more molybdenum
DE102007037736B4 (en) * 2007-08-09 2012-11-15 Kocks Technik Gmbh & Co. Kg Mandrel or mandrel for a tube manufacturing process and use of such a mandrel or such a mandrel

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