EP0302255B1 - Verwendung einer Kupferlegierung als Werkstoff für Stranggiesskokillen - Google Patents

Verwendung einer Kupferlegierung als Werkstoff für Stranggiesskokillen Download PDF

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Publication number
EP0302255B1
EP0302255B1 EP88110843A EP88110843A EP0302255B1 EP 0302255 B1 EP0302255 B1 EP 0302255B1 EP 88110843 A EP88110843 A EP 88110843A EP 88110843 A EP88110843 A EP 88110843A EP 0302255 B1 EP0302255 B1 EP 0302255B1
Authority
EP
European Patent Office
Prior art keywords
copper
copper alloy
alloy
silicon
continuous casting
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 - Lifetime
Application number
EP88110843A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0302255A1 (de
Inventor
Horst Dipl.-Ing. Gravemann
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.)
KM Kabelmetal AG
Original Assignee
KM Kabelmetal 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 KM Kabelmetal AG filed Critical KM Kabelmetal AG
Priority to AT88110843T priority Critical patent/ATE71154T1/de
Publication of EP0302255A1 publication Critical patent/EP0302255A1/de
Application granted granted Critical
Publication of EP0302255B1 publication Critical patent/EP0302255B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/059—Mould materials or platings

Definitions

  • the invention relates to the use of a copper alloy consisting of 0.01 to 0.15% boron, 0.01 to 0.2% magnesium and optionally up to a maximum of 0.6% of at least one element from the group 0 to 0, 05% silicon, 0 to 0.5% nickel, 0 to 0.3% iron, 0 to 0.3% titanium, 0 to 0.2% zirconium and 0 to 0.04% phosphorus, the rest copper including manufacturing-related impurities as Material for continuous casting molds.
  • a hardenable copper alloy for continuous casting molds which contains 0.3 to 1.5% chromium, 0.1 to 0.5% zirconium and up to 0.4% of at least one deoxidizing agent Group has phosphorus, lithium, calcium, magnesium and silicon. Due to the relatively high chromium content in connection with the zirconium content, processing difficulties can arise.
  • the object of the present invention is to provide an alloy for continuous casting molds which, in addition to high thermal conductivity, has high mechanical strength values, in particular high hot plasticity.
  • the solution to this problem according to the invention consists in the use of a copper alloy of 0.01 to 0.15% boron, 0.01 to 0.2% magnesium and, if necessary, up to a maximum of 0.6% of at least one element from the group 0 to 0, 05% silicon, 0 to 0.5% nickel, 0 to 0.3% iron, 0 to 0.3% titanium, 0 to 0.2% zirconium and 0 to 0.04% phosphorus, the rest copper including manufacturing-related impurities as Material for continuous casting molds.
  • the copper alloy to be used preferably has a boron content between 0.01 and 0.05% and a magnesium content between 0.05 and 0.15%.
  • the other optional alloy components can be added either individually or in combination up to the specified maximum value.
  • the copper alloy is preferably in the cold worked condition, i.e. H. the last step in the process should be cold working of at least 10%.
  • the process steps of annealing and subsequent cold working can also be repeated with particular advantage, the annealing treatment advantageously being carried out at a somewhat reduced temperature in the temperature range from about 200 to 450.degree. A further increase in strength can be achieved by this measure.
  • the material for continuous casting molds to be used according to the invention is distinguished by a particularly favorable combination of mechanical and physical properties. Its thermal conductivity is over 85% of the value for pure copper. The property values for heat resistance, creep resistance and hot plasticity meet the requirements desired for continuous casting molds.
  • the Brinell hardness as a yardstick for the abrasion resistance reaches values of over 100.
  • Another essential requirement with continuous casting molds is a high corrosion resistance, which is likewise fulfilled in an excellent manner by the copper-magnesium-boron alloy to be used according to the invention.
  • the physical properties that are placed on a continuous casting mold are not just limited to conductivity. Rather, it comes down to properties that could not easily be derived from the prior art. Since the melt in contact with the mold wall has a temperature of more than 1300 ° C for the case of a steel alloy - the melting point of copper or copper alloys, on the other hand, is around 1100 ° C - high thermal conductivity is very important. However, since the mold wall can reach a temperature of up to 450 ° C, the heat resistance of the mold material is also of crucial importance, ie the sharp drop in strength has to be shifted in a temperature range that is above the operating temperature of the mold.
  • the recrystallization temperature - that is the semi-hard temperature - of the alloy to be used according to the invention for an annealing time of half an hour is approximately 450 to 540 ° C. At a constant annealing temperature of 350 ° C., the semi-hard annealing time is generally above 64 hours.
  • Another important property of materials for continuous casting molds is the warm plasticity, which is determined by the fracture constriction. A high constriction of fracture is a material for Continuous casting molds required so that no crack cracks occur under thermal stresses at high wall temperatures.
  • Another criterion for a mold material is its creep behavior at elevated temperatures.
  • a low creep elongation of the mold material significantly increases its service life, because it ensures the necessary dimensional stability of the mold over a longer period. Since continuous casting molds are usually cooled with water on the side facing away from the melt, the mold material also requires a high level of corrosion resistance.
  • a copper alloy of 0.096% magnesium, 0.032% boron, the rest copper including manufacturing-related impurities (Leg. 1) was melted in a graphite crucible under vacuum and cast into a block. This block was then extruded into a tube which, after cooling, was subjected to a 20% reduction in cross-sectional machining. After five hours of intermediate annealing at 500 ° C, a first sample was cold-formed by 10%, a second sample by 20% and a third sample by 40%. The mechanical properties, the electrical conductivity and the recrystallization behavior were investigated for each of these deformation states. The measured values are listed in Tables I to III, both SF-Cu and a hardenable copper-chromium-zirconium alloy being included as comparison materials.
  • the electrical conductivity of the base alloy can be determined by adding at least one element from the group 0 to 0.05% silicon, 0 to 0.5% nickel, 0 to 0.3% iron, 0 to 0.3% titanium, 0 to 0.2% zirconium and 0 to 0.04% phosphorus are reduced to values between 35 and 52 m / ⁇ mm2 without the overall advantageous properties of the base alloy in terms of hardness, recrystallization temperature and creep resistance being adversely affected thereby. Due to the greater proportion of recrystallization-inhibiting boron-containing phases in the structure, such alloy compositions show a higher temper resistance than a corresponding less boron copper alloy.
  • both the half-hard temperature and the half-hard annealing time are given in the right part of Table I.
  • Tables II and III contain measurement results on the creep elongation of the investigated materials in percent at a constant load of 150 N / mm2 and a temperature of 200 or 250 ° C.
  • the values for the service life of tube molds according to 6, 24, 72, 216 are given , 500, 1000 and 2000 hours.
  • Table I also shows that the fracture constriction in the alloy to be used according to the invention is only slightly dependent on the degree of deformation.
  • the alloy to be used according to the invention has the advantage over the prior art that it can be produced more cost-effectively than a copper-chromium-zirconium alloy.
  • the invention is of course not limited to the tube molds described in the exemplary embodiments. Rather, the copper alloy can be used for molds of all kinds, with which metallic shaped strands of steel alloys or various non-ferrous metals and non-ferrous metal alloys, for example copper and copper alloys, can be produced in a semi-continuous or fully continuous manner.
  • Examples of further applications are block molds, casting wheels, casting roll jackets and side dams of double belt casting machines.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)
  • Conductive Materials (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Prevention Of Electric Corrosion (AREA)
EP88110843A 1987-08-05 1988-07-07 Verwendung einer Kupferlegierung als Werkstoff für Stranggiesskokillen Expired - Lifetime EP0302255B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88110843T ATE71154T1 (de) 1987-08-05 1988-07-07 Verwendung einer kupferlegierung als werkstoff fuer stranggiesskokillen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3725950 1987-08-05
DE19873725950 DE3725950A1 (de) 1987-08-05 1987-08-05 Verwendung einer kupferlegierung als werkstoff fuer stranggiesskokillen

Publications (2)

Publication Number Publication Date
EP0302255A1 EP0302255A1 (de) 1989-02-08
EP0302255B1 true EP0302255B1 (de) 1992-01-02

Family

ID=6333094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88110843A Expired - Lifetime EP0302255B1 (de) 1987-08-05 1988-07-07 Verwendung einer Kupferlegierung als Werkstoff für Stranggiesskokillen

Country Status (13)

Country Link
US (1) US4883112A (pt)
EP (1) EP0302255B1 (pt)
JP (1) JP2662421B2 (pt)
KR (1) KR960001714B1 (pt)
AT (1) ATE71154T1 (pt)
BR (1) BR8803869A (pt)
CA (1) CA1321293C (pt)
DE (2) DE3725950A1 (pt)
ES (1) ES2039513T3 (pt)
FI (1) FI91088C (pt)
IN (1) IN169711B (pt)
MX (1) MX169555B (pt)
ZA (1) ZA885799B (pt)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5119865A (en) * 1990-02-20 1992-06-09 Mitsubishi Materials Corporation Cu-alloy mold for use in centrifugal casting of ti or ti alloy and centrifugal-casting method using the mold
FR2666757B1 (fr) * 1990-09-14 1992-12-18 Usinor Sacilor Virole pour cylindre de coulee continue des metaux, notamment de l'acier, entre cylindres ou sur un cylindre.
DE10032627A1 (de) * 2000-07-07 2002-01-17 Km Europa Metal Ag Verwendung einer Kupfer-Nickel-Legierung
JP4360832B2 (ja) * 2003-04-30 2009-11-11 清仁 石田 銅合金
JP5668814B1 (ja) * 2013-08-12 2015-02-12 三菱マテリアル株式会社 電子・電気機器用銅合金、電子・電気機器用銅合金薄板、電子・電気機器用部品、端子およびバスバー

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2183592A (en) * 1939-12-19 Electrical conductor
US4015982A (en) * 1972-03-07 1977-04-05 Nippon Kokan Kabushiki Kaisha Mold for continuous casting process
GB1431729A (en) * 1973-08-04 1976-04-14 Hitachi Shipbuilding Eng Co Copper alloy and mould produced therefrom
US3928201A (en) * 1974-08-08 1975-12-23 Caterpillar Tractor Co Filter mounting and bypass valve assembly
SU544698A1 (ru) * 1975-05-07 1977-01-30 Государственный Научно-Исследовательский И Проектный Институт Сплавов И Обработки Цветных Металлов Сплав на основе меди
DE2635443C2 (de) * 1976-08-06 1984-10-31 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verwendung einer Kupferlegierung
DE2635454C2 (de) * 1976-08-06 1986-02-27 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verwendung einer Kupferlegierung
US4377424A (en) * 1980-05-26 1983-03-22 Chuetsu Metal Works Co., Ltd. Mold of precipitation hardenable copper alloy for continuous casting mold
DE3109438A1 (de) * 1981-03-12 1982-09-30 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover "verfahren zur herstellung von rohrfoermigen, geraden oder gekruemmten stranggiesskokillen mit parallelen oder konischen innenkonturen aus aushaertbaren kupferlegierungen"
DE3218100A1 (de) * 1982-05-13 1983-11-17 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren zur herstellung einer rohrkokille mit rechteckigem bzw. quadratischem querschnitt
JPS59159243A (ja) * 1983-03-02 1984-09-08 Hitachi Ltd 鋳造用金型
JPS614900A (ja) * 1984-06-18 1986-01-10 Shoketsu Kinzoku Kogyo Co Ltd エゼクタ装置

Also Published As

Publication number Publication date
FI91088B (fi) 1994-01-31
ATE71154T1 (de) 1992-01-15
JPH01208431A (ja) 1989-08-22
MX169555B (es) 1993-07-12
DE3867367D1 (de) 1992-02-13
US4883112A (en) 1989-11-28
EP0302255A1 (de) 1989-02-08
BR8803869A (pt) 1989-02-21
ES2039513T3 (es) 1993-10-01
KR890003972A (ko) 1989-04-19
DE3725950A1 (de) 1989-02-16
FI91088C (fi) 1994-05-10
FI883662A0 (fi) 1988-08-05
JP2662421B2 (ja) 1997-10-15
KR960001714B1 (ko) 1996-02-03
FI883662A (fi) 1989-02-06
IN169711B (pt) 1991-12-14
ZA885799B (en) 1989-09-27
CA1321293C (en) 1993-08-17

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