CA2725206C - Iron-nickel alloy - Google Patents

Iron-nickel alloy Download PDF

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Publication number
CA2725206C
CA2725206C CA2725206A CA2725206A CA2725206C CA 2725206 C CA2725206 C CA 2725206C CA 2725206 A CA2725206 A CA 2725206A CA 2725206 A CA2725206 A CA 2725206A CA 2725206 C CA2725206 C CA 2725206C
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Prior art keywords
wire
alloy
mass
accordance
sum
Prior art date
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CA2725206A
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French (fr)
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CA2725206A1 (en
Inventor
Bernd De Boer
Bodo Gehrmann
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VDM Metals GmbH
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Outokumpu VDM GmbH
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Filing date
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Priority claimed from DE200810022855 external-priority patent/DE102008022855A1/en
Priority claimed from DE200810022854 external-priority patent/DE102008022854A1/en
Application filed by Outokumpu VDM GmbH filed Critical Outokumpu VDM GmbH
Publication of CA2725206A1 publication Critical patent/CA2725206A1/en
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/18Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001Technical content checked by a classifier
    • H01L2924/0002Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Soft Magnetic Materials (AREA)
  • Continuous Casting (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Insulated Conductors (AREA)
  • Lead Frames For Integrated Circuits (AREA)

Abstract

The invention relates to a wire for a wire for a power line comprising an iron-nickel alloy having in mass %: C > 0.1 to 0.4% Cr > 0.6 to < 1.2% Ni 35 to < 38% Mn < 0.08% Si <0.08% Mo 2.1 to 2.8% Nb 0.05 to 0.3% Al 0.2 to 0.4% Mg > 0.001 to 0.01% V <=0.1% W 0.25 to 1.0% Co 0 to < 0.5% Fe remainder and constituents resulting from a production process, wherein: the sum, in mass%, of Mo + W is between 2.2 and 3.5%, the sum, in mass%, of Cr + W is between 1.0 and 2.0%, the sum, in mass%, of Si + Mn is < 0.1%, and the alloy has a thermal expansion coefficient of < 4 x 10 -6/K in the temperature range between 20 and 200°C.

Description

=
Iron-Nickel Alloy The invention relates to an iron-nickel alloy having a low thermal expansion coefficient and special mechanical properties.
It is known that iron-based alloys having approximately 36% nickel have low thermal expansion coefficients in the temperature range between 20 and 100 C. Those alloys have therefore been used for several decades wherever constant lengths are required, even with changes in temperature, such as for instance in precision instruments, clocks, bimetals, and shadow masks for color televisions and computer monitors.
KR 100261678 BI is an invar alloy wire and a method for producing it. The invar alloy has the following composition (in mass %): 33 to 38% nickel, 0.5 to 1.0% cobalt, 0.01 to 1.3% niobium, 0.5 to 4% molybdenum, 0.2 to 1.5% chromium, 0.05 to 0.35% carbon, 0.1 to 1.2%
silicon, 0.1 to 0.9% manganese, max. 0.1% magnesium, max. 0.1% titanium, and the remainder iron, the sum of Mo + Cr being between 1.2 and 5.0% and the sum of niobium and carbon being between 0.1 and 0.6%.
KR 1020000042608 discloses a high-strength invar alloy wire and a method for producing it.
The alloy used contains (in mass %): no more than 0.1% nitrogen, 0.01 to 0.2%
niobium, 0.3 to 0.4% carbon, 33 to 38% nickel, 0.5 to 4% molybdenum, 0.210 1.5% chromium, 0.1 to 1.2%
silicon, 0.1 to 0.9% manganese, 1.0 to 10% cobalt, and, as needed, additions of up to 0.1% each Al, Mg, and Ti, and the remainder iron.
Both publications provide method parameters for cold drawing and hot drawing and annealing within defined temperature ranges.
The invention relates to a creep-resistant iron-nickel alloy having a low thermal expansion coefficient and special mechanical properties.
Moreover, a production , ' 29779-30
2 process for wire-like components made of this alloy is provided. It is possible to employ the material for specific uses, and the alloy has a low thermal expansion coefficient.
This is attained using an iron-nickel alloy having the following composition:
C 0.05 to 0.5%
Cr 0.2 to 2.0%
Ni 33 to 42%
Mn < 0.1%
Si < 0.1%
Mo 1.5 to 4.0%
Nb 0.01 to 0.5%
Al 0.1 to 0.8%
Mg 0.001 to 0.01%
V Max. 0.1%
W 0.1 to 1.5%
Co Max 2.0%
Fe remainder and constituents resulting from the production process.
In one aspect, the invention relates to a wire for a power line comprising an iron-nickel alloy consisting of, in mass %:
C > 0.1 to 0.4%
Cr >0.6 to < 1.2%

2a Ni 35 to < 38%
Mn <0.08%
Si <0.08%
Mo 2.1 to 2.8%
Nb 0.05 to 0.3%
Al 0.2 to 0.4%
Mg > 0.001 to 0.01%
V
W 0.25 to 1.0%
Co 0 to < 0.5%
Zr 0 to < 0.2%
B 0 to 0.01%
Fe remainder and constituents resulting from a production process, wherein: the sum, in mass%, of Mo + W is between 2.2 and 3.5%, the sum, in mass%, of Cr + W is between 1.0 and 2.0%, the sum, in mass%, of Si + Mn is <0.1%, and the alloy has a thermal expansion coefficient of < 4 x 10-6/K in the temperature range between 20 and 200 C.
One preferred variant of the inventive iron-nickel alloy is provided as follows (in mass %):
C 0.1 to 0.4%
Cr 0.5 to 1.5%
Ni 34 to 40%
Mn < 0.08%

, '29779-30 2b Si <0.08%
Mo > 2.0 to < 3.5%
Nb 0.05 to 0.4%
3 Al 0.2 to 0.5%
Mg 0.001 to < 0.01%
V Max. 0.1%
W 0.2 to < 1.0%
Co 0 to 0.5%
Fe Remainder and constituents resulting from the production process.
Another variant is formed by (in mass %):
C > 0.15 to < 0.4%
Cr 0.6 to max. 1.2%
Ni 35 to 40%
Mn <0.08%
Si <0.08%
Mo > 2.0 to < 3.0%
Nb 0.05 to 0.3%
Al > 0.1 to < 0.5%
Mg > 0.001 to <0.01%
V Max. 0.1%
W 0.25 to 1.0%
Co 0 to max 0.5%
Fe Remainder and constituents resulting from the production process.
The inventive composition of the alloy is distinguished from the prior art in that the Si and Mn contents are kept as small as technically possible. It is known that there is a strong relationship between the elements silicon and manganese with respect to the thermal expansion coefficient.
On the other hand, these elements are metallurgically necessary in order to ensure adequate processability. This relates in particular to hot shaping to create billets and wire rods.
Thus, using the inventive chemical composition it is possible to use the smallest possible amounts of the elements silicon and manganese so that the negative effects these elements have
4 on the theme expansion coefficient can be avoided and at the same time the alloy is easy to process. For this reason the sum of Mn + Si should not exceed 0.2% (in mass %). The sum of Mn + Si should be <0.1% where this is technically feasible.
It is of particular advantage when the inventive alloy has a nickel content between 35 and 38%, a chromium content of > 0.6 to < 1.2%, a molybdenum content between 2.1 and 2.8%, an aluminum content between 0.2 and 0.4%, and a tungsten content of > 0.25 to <
1.0%.
If necessary, the element zirconium may also be added in contents > 0 to <
0.2% and/or the element B may be added in contents > 0 ¨ 0.01% of the inventive alloy.
B + Zr individually or together improve the hot formability of the alloy.
Moreover, it is advantageous when the awn of the elements Mo + W is between 2.0 and 4.0%.
It is likewise advantageous for the mechanical properties when the sum of the elements Cr + W
is between 1.0 and 2.0%.
According to another thought of the invention, the element W may be substituted for some of the element Mo.
It is significant that the alloy elements Mo, W, Cr, and C are available in sufficient quantities and that the ratio of (Mo + W + Cr)IC is selected such that it is possible to achieve a balanced mix of carbide strengthening, mixed crystal hardening, and cold hardening in the final product. An optimum ratio is considered to be in the range between 13.5 and 14.5, e.g. 14 and 15.
According to another thought of the invention, the W;Cr:Mo ratio should be approximately 1:2:5. However, the portion of the aforesaid elements in the inventive alloy must be specified such that the thermal expansion coefficient sought is not exceeded.

In the temperature range between 20 and 200 C the inventive alloy has a thermal expansion coefficient of < 4 x 10-61K, especially < 3.5 x 10-6/K.
Furthermore, the invention relates to a method for producing components from the inventive alloy in an arc furnace, an induction furnace, or a vacuum furnace (where necessary with
5 VOD treatment), with subsequent ingot casting, hot rolling (or forging) to create billets and wire rods on wire of a pre-specifiable thickness, and subsequent drawing to create wire-shaped pre-products with a pre-specifiable diameter, annealing processes occurring when necessary between individual drawing steps. Since the degree of cold strengthening is critical for the usage properties, both with regard to the thermal expansion coefficient and with regard to strength, the wire rod diameter must be adjusted such that adequate cold forming can be performed prior to and after intermediate annealing, which may take place in multiple stages.
In one method aspect, the invention relates to a method for producing a wire-shaped component from the alloy in accordance with any one of claims 1 to 18, comprising: casting a melt of the alloy into blocks; rolling the blocks to create billets; drawing the billets to create a pre-product wire with a pre-specified diameter; a luminizing pre-product wire;
and drawing the pre-product wire to a final dimension.
According to another thought of the invention, the inventive alloy may be used as wire for power lines, especially as the core wire for power lines.
The inventive alloy may moreover be advantageously used for:
-- Lead frames -- Shaped parts, especially carbon fiber molded parts -- Components in chip production.
For the preferred uses the inventive alloy may be present in the form of sheet, bar, strip, or wire material.

Claims (9)

CLAIMS:
1. A wire for a power line comprising an iron-nickel alloy consisting of, in mass %:
C > 0.1 to 0.4%
Cr > 0.6 to < 1.2%
Ni 35 to < 38%
Mn < 0.08%
Si < 0.08%
Mo 2.1 to 2.8%
Nb 0.05 to 0.3%
Al 0.2 to 0.4%
Mg > 0.001 to 0.01%
V <=0.1%
W 0.25 to 1.0%
Co 0 to < 0.5%
Zr 0 to < 0.2%
B 0 to 0.01%
Fe remainder and constituents resulting from a production process, wherein:
the sum, in mass%, of Mo + W is between 2.2 and 3.5%, the sum, in mass%, of Cr + W is between 1.0 and 2.0%, the sum, in mass%, of Si + Mn is < 0.1%, and the alloy has a thermal expansion coefficient of < 4 x 10-6/K in the temperature range between 20 and 200°C.
2. The wire in accordance with claim 1, wherein the alloy has in mass %:
C > 0.15 to < 0.4%
W 0.25 to 1.0%.
3. The wire in accordance with claim 1 or 2, wherein the alloy has in mass %:
Zr > 0 to < 0.2% and/or B > 0-0.01%.
4. The wire in accordance with any one of claims 1 to 3, wherein for the alloy the ratio (Mo + W + Cr)/C is 13.5 ¨ 15.5.
5. The wire in accordance with any one of claims 1 to 4, wherein for the alloy the element W is substituted for some of the element Mo.
6. The wire in accordance with any one of claims 1 to 5, wherein the alloy has a thermal expansion coefficient of 3.5 x 10-6/K in the temperature range between 20 and 200°C.
7. A method for producing the wire in accordance with any one of claims 1 to 6, comprising: casting a melt of the alloy into blocks; rolling the blocks to create billets;
drawing the billets to create a pre-product wire with a pre-specified diameter; aluminizing the pre-product wire; and drawing the pre-product wire to a final dimension.
8. The method is accordance with claim 7, wherein between individual drawing steps there is an annealing process.
9. A use of the wire as defined in any one of claims 1 to 6, as a core wire for a power line.
CA2725206A 2008-05-08 2009-04-29 Iron-nickel alloy Active CA2725206C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE200810022855 DE102008022855A1 (en) 2008-05-08 2008-05-08 Creep-resistant, readily processed, low thermal expansion iron-nickel alloy with minimized manganese and silicon contents, is useful e.g. in wires for overhead power lines
DE102008022855.9 2008-05-08
DE102008022854.0 2008-05-08
DE200810022854 DE102008022854A1 (en) 2008-05-08 2008-05-08 Creep-resistant, readily processed, low thermal expansion iron-nickel alloy with minimized manganese and silicon contents, is useful e.g. in wires for overhead power lines
PCT/DE2009/000610 WO2009135469A1 (en) 2008-05-08 2009-04-29 Iron-nickel alloy

Publications (2)

Publication Number Publication Date
CA2725206A1 CA2725206A1 (en) 2009-11-12
CA2725206C true CA2725206C (en) 2016-03-15

Family

ID=41110501

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2725206A Active CA2725206C (en) 2008-05-08 2009-04-29 Iron-nickel alloy

Country Status (9)

Country Link
US (1) US20110056589A1 (en)
EP (1) EP2279274B1 (en)
JP (1) JP5546531B2 (en)
KR (1) KR20110009657A (en)
CN (1) CN101978086B (en)
AT (1) ATE544876T1 (en)
CA (1) CA2725206C (en)
ES (1) ES2379579T3 (en)
WO (1) WO2009135469A1 (en)

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EP2365730A1 (en) * 2010-03-02 2011-09-14 Saint-Gobain Glass France Pane with electric connection element
EP2408260A1 (en) 2010-07-13 2012-01-18 Saint-Gobain Glass France Glass pane with electric connection element
US10305239B2 (en) 2011-05-10 2019-05-28 Saint-Gobain Glass France Pane comprising an electrical connection element
PT3576491T (en) 2011-05-10 2023-12-22 Saint Gobain Pane with electric connection element
KR20140024418A (en) 2011-05-10 2014-02-28 쌩-고벵 글래스 프랑스 Disk having an electric connecting element
TWI558039B (en) 2012-06-06 2016-11-11 法國聖戈本玻璃公司 Pane with an electrical connection element,method for producing the same,and use of the same
AU2013314646B2 (en) 2012-09-14 2016-12-22 Saint-Gobain Glass France Pane having an electrical connection element
MA37916B1 (en) 2012-09-14 2017-06-30 Saint Gobain Glass with an electrical connection element
EA029913B1 (en) 2012-11-21 2018-05-31 Сэн-Гобэн Гласс Франс Pane with electrical connection element and connection bridge
CN104404340A (en) * 2014-11-04 2015-03-11 无锡贺邦金属制品有限公司 Iron nickel alloy stamping part
CN104404339A (en) * 2014-11-04 2015-03-11 无锡贺邦金属制品有限公司 Fe-Ni based alloy stamping part
CN106995904B (en) * 2017-05-19 2018-08-21 广东省钢铁研究所 A kind of preparation method of the anti-corrosion iron-nickel alloy band of antirust
CN108396226A (en) * 2018-04-17 2018-08-14 全球能源互联网研究院有限公司 A kind of aerial condutor steel alloy and preparation method thereof
CN110885978B (en) * 2019-11-28 2021-10-15 芜湖点金机电科技有限公司 Method for strengthening working belt of aluminum profile extrusion hot-working die
CN115725895B (en) * 2021-08-26 2023-11-14 宝武特种冶金有限公司 Low-expansion Fe-Ni invar alloy wire with tensile strength more than or equal to 1600MPa and manufacturing method thereof
CN113718182B (en) * 2021-08-30 2022-06-17 无锡华能电缆有限公司 Zinc-aluminum coating invar steel single wire and preparation method thereof
CN114633045A (en) * 2022-04-01 2022-06-17 山西太钢不锈钢股份有限公司 Welding material suitable for iron-nickel alloy welding and application thereof
CN115852267B (en) * 2022-12-14 2024-07-12 河钢股份有限公司 High-strength high-conductivity low-expansion iron-nickel-molybdenum alloy wire and production method thereof
CN116396094B (en) * 2023-03-24 2024-03-01 中铝郑州有色金属研究院有限公司 Connection method of nickel ferrite-based ceramic inert anode and metal conductive block

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Also Published As

Publication number Publication date
JP2011523436A (en) 2011-08-11
US20110056589A1 (en) 2011-03-10
CN101978086B (en) 2013-07-10
WO2009135469A1 (en) 2009-11-12
KR20110009657A (en) 2011-01-28
EP2279274A1 (en) 2011-02-02
JP5546531B2 (en) 2014-07-09
ES2379579T3 (en) 2012-04-27
ATE544876T1 (en) 2012-02-15
CN101978086A (en) 2011-02-16
EP2279274B1 (en) 2012-02-08
CA2725206A1 (en) 2009-11-12

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