EP4124667A1 - Lead and antimony-free brass alloy - Google Patents
Lead and antimony-free brass alloy Download PDFInfo
- Publication number
- EP4124667A1 EP4124667A1 EP22184790.8A EP22184790A EP4124667A1 EP 4124667 A1 EP4124667 A1 EP 4124667A1 EP 22184790 A EP22184790 A EP 22184790A EP 4124667 A1 EP4124667 A1 EP 4124667A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lead
- alloy
- antimony
- brass alloy
- free brass
- 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.)
- Pending
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 57
- 239000000956 alloy Substances 0.000 title claims abstract description 57
- 229910001369 Brass Inorganic materials 0.000 title claims abstract description 30
- 239000010951 brass Substances 0.000 title claims abstract description 30
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 229910052745 lead Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 5
- 229910052787 antimony Inorganic materials 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052785 arsenic Inorganic materials 0.000 claims description 2
- 229910052738 indium Inorganic materials 0.000 claims 1
- 238000009749 continuous casting Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
Images
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
- C22C9/04—Alloys based on copper with zinc as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
Definitions
- the invention relates to a lead and antimony-free brass alloy.
- Pb was added in an amount of up to 4% by weight to improve the machinability of brass alloys.
- the addition of Pb is no longer permitted due to legal requirements.
- the EP 3 320 122 B1 discloses a brass alloy to which neither Pb nor Bi is added. To improve machinability, it is proposed to add 0.005 to 1.0% by weight of In to the brass alloy. Although the proposed addition of In improves machinability, relatively long spiral chips are formed during machining, which can lead to blockages during removal and to tool breakage.
- the EP 2 913 415 A1 discloses another lead and bismuth-free brass alloy which, moreover, contains no Si.
- the known alloy contains 60 to 65% by weight Cu and 0.01 to 0.15% by weight Sb.
- the EP 2 467 507 B1 discloses a lead-free brass alloy containing Fe, Ni and Sn.
- the object of the invention is to eliminate the disadvantages of the prior art.
- a lead-free and antimony-free brass alloy with improved machinability should be specified.
- the brass alloy should have low hot embrittlement, so that it can be processed by hot forming.
- [%] means percent by weight.
- the addition of 0.1 to 1.5% Mg proposed according to the invention can set the Pb content to less than 0.1% without the formation of undesirably long spiral chips during machining.
- the proposed brass alloy is characterized not only by improved chip breaking, but also by low hot embrittlement. It can be processed by hot forming.
- a "brass alloy free of lead and antimony” is understood to mean an alloy which contains less than 0.1% Pb and less than 0.001% Sb.
- the alloy can contain less than 0.15% As and/or less than 0.15% P and/or less than 0.1% Al and/or less than 0.1% Sn.
- Sn stabilizes the ⁇ solid solution.
- As leads to improved corrosion resistance of the alloy, in particular As counteracts dezincification.
- Addition of P improves the machinability of the alloy.
- it contains 57 to less than 60%, preferably 57.5 to 58.5% Cu.
- the proposed alloy is less expensive because of the relatively lower Cu contents.
- Mg more than 0.5% Mg is contained.
- the proposed Mg content contributes to improved machinability.
- the content of Pb is suitably in the range of 0.05 to 0.09%.
- the content of In is less than 0.005%.
- the Zn content is 40 to 42.5%.
- An alloy with the proposed Zn content shows good machinability.
- the proposed lead and antimony-free brass alloy also enables good processability in the continuous casting process.
- the chip images according to Figures 1 to 4 were each produced by turning alloys at a rotating speed of 850 rpm.
- An indexable insert with the identifier KNMX160405-R81C907 was used.
- the in the Figures 1 to 4 The displayed scale is 5 mm in each case.
- the first example alloy is a reference alloy.
- the first example alloy contains 58% Cu and 42% Zn, ie the first example alloy contains no addition of Mg.
- example alloy 1 when example alloy 1 is longitudinally turned, long spiral chips are formed. Such spiral chips are undesirable when machining. They can lead to blockages during transport and tool breakage.
- the second example alloy contains 58% Cu, 41.5% Zn and 0.5% Mg. It can be seen that the chips produced during longitudinal turning are shorter than those in 1 shown chips.
- FIG 3 shows a chip image after longitudinal turning of a third example alloy.
- the third example alloy consists of 58% Cu, 41% Zn and 1% Mg. It can be clearly seen that the chips produced are shorter than the chips produced by longitudinal turning of the second example alloy.
- the fourth example alloy consists of 58% Cu, 40.5% Zn and 1.5% Mg.
- the chips produced when turning the fourth example alloy are even smaller than the chips produced by longitudinal turning of the third example alloy.
- the proposed addition of 0.1 to 1.5% Mg to a lead-free and antimony-free brass alloy means that chip breaking can be significantly improved.
- the proposed brass alloy is also characterized by low hot embrittlement. It can be processed by means of hot forming, in particular in the continuous casting process.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Domestic Plumbing Installations (AREA)
- Conductive Materials (AREA)
- Cell Electrode Carriers And Collectors (AREA)
- Contacts (AREA)
- Sliding-Contact Bearings (AREA)
- Lead Frames For Integrated Circuits (AREA)
Abstract
Die Erfindung betrifft eine Blei- und Antimonfreie Messinglegierung, enthaltend 56 bis 66% Cu, 0,1 bis 1,5% Mg, weniger als 0,1% Pb, Rest Zn sowie unvermeidbare Verunreinigungen.The invention relates to a lead and antimony-free brass alloy containing 56 to 66% Cu, 0.1 to 1.5% Mg, less than 0.1% Pb, the remainder Zn and unavoidable impurities.
Description
Die Erfindung betrifft eine Blei- und Antimonfreie Messinglegierung.The invention relates to a lead and antimony-free brass alloy.
In der Vergangenheit wurde zur Verbesserung der Zerspanbarkeit von Messinglegierungen Pb in einem Umfang von bis zu 4 Gew.% zugesetzt. Der Zusatz von Pb ist wegen gesetzlicher Vorgaben nicht mehr zulässig.In the past, Pb was added in an amount of up to 4% by weight to improve the machinability of brass alloys. The addition of Pb is no longer permitted due to legal requirements.
Es wurde gefunden, dass die Zugabe von Pb durch eine Zugabe von Bi ersetzt werden kann. Es hat sich allerdings gezeigt, dass ein Zusatz von Bi zu einer Warmversprödung der Messinglegierung führt. Derartige Messinglegierungen lassen sich nur eingeschränkt warm umformen. Infolgedessen werden solche Messinglegierungen für gepresste Formteile nicht verwendet.It has been found that addition of Pb can be replaced with addition of Bi. However, it has been shown that adding Bi leads to hot embrittlement of the brass alloy. Such brass alloys can only be hot-formed to a limited extent. As a result, such brass alloys are not used for pressed moldings.
Die
Die
Der Zusatz von Sb führt zu einer Warmversprödung. Alternativ wird in der
Die
Aus der
Aufgabe der Erfindung ist es, die Nachteile nach dem Stand der Technik zu beseitigen. Es soll insbesondere eine Blei- und Antimonfreie Messinglegierung mit verbesserter Zerspanbarkeit angegeben werden. Nach einem weiteren Ziel der Erfindung soll die Messinglegierung eine geringe Warmversprödung aufweisen, so dass sie mittels Warmumformung verarbeitet werden kann.The object of the invention is to eliminate the disadvantages of the prior art. In particular, a lead-free and antimony-free brass alloy with improved machinability should be specified. According to a further aim of the invention, the brass alloy should have low hot embrittlement, so that it can be processed by hot forming.
Diese Aufgabe wird durch die Merkmale des Patentanspruchs 1 gelöst. Zweckmäßige Ausgestaltungen ergeben sich aus den Merkmalen der abhängigen Patentansprüche.This object is solved by the features of patent claim 1. Expedient configurations emerge from the features of the dependent patent claims.
Nach Maßgabe der Erfindung wird eine Blei- und Antimonfreie Messinglegierung vorgeschlagen, enthaltend
- 56 bis 66% Cu,
- 0,1 bis 1,5% Mg,
- weniger als 0,1% Pb,
- Rest Zn sowie
- unvermeidbare Verunreinigungen.
- 56 to 66% Cu,
- 0.1 to 1.5% Mg,
- less than 0.1% Pb,
- remainder Zn as well
- unavoidable impurities.
Im Rahmen der vorliegenden Beschreibung werden unter [%] Gewichtsprozent verstanden.In the context of the present description, [%] means percent by weight.
Es hat sich überraschenderweise gezeigt, dass durch den erfindungsgemäß vorgeschlagenen Zusatz von 0,1 bis 1,5% Mg der Gehalt an Pb auf weniger als 0,1% eingestellt werden kann, ohne dass sich beim Zerspanen unerwünschterweise lange Spiralspäne bilden. Die vorgeschlagene Messinglegierung zeichnet sich nicht nur durch einen verbesserten Spanbruch, sondern auch durch eine geringe Warmversprödung aus. Sie kann mittels Warmumformung verarbeitet werden.Surprisingly, it has been shown that the addition of 0.1 to 1.5% Mg proposed according to the invention can set the Pb content to less than 0.1% without the formation of undesirably long spiral chips during machining. The proposed brass alloy is characterized not only by improved chip breaking, but also by low hot embrittlement. It can be processed by hot forming.
Erfindungsgemäß wird unter einer "Blei- und Antimonfreien Messinglegierung" eine Legierung verstanden, welche weniger als 0,1% Pb und weniger als 0,001% Sb enthält.According to the invention, a "brass alloy free of lead and antimony" is understood to mean an alloy which contains less than 0.1% Pb and less than 0.001% Sb.
Nach einer vorteilhaften Ausgestaltung kann die Legierung weniger als 0,15% As und/oder weniger als 0,15% P und/oder weniger als 0,1% Al und/oder weniger als 0,1% Sn enthalten. Sn stabilisiert den β-Mischkristall. As führt zu einer verbesserten Korrosionsbeständigkeit der Legierung, insbesondere wirkt As einer Entzinkung entgegen. Ein Zusatz von P verbessert die Zerspanbarkeit der Legierung.According to an advantageous embodiment, the alloy can contain less than 0.15% As and/or less than 0.15% P and/or less than 0.1% Al and/or less than 0.1% Sn. Sn stabilizes the β solid solution. As leads to improved corrosion resistance of the alloy, in particular As counteracts dezincification. Addition of P improves the machinability of the alloy.
Nach einer weiteren vorteilhaften Ausgestaltung sind 57 bis weniger als 60%, vorzugsweise 57,5 bis 58,5% Cu, enthalten. Die vorgeschlagene Legierung ist wegen der relativ niedrigeren Gehalte an Cu kostengünstiger.According to a further advantageous embodiment, it contains 57 to less than 60%, preferably 57.5 to 58.5% Cu. The proposed alloy is less expensive because of the relatively lower Cu contents.
Nach einer weiteren Ausgestaltung sind mehr als 0,5% Mg enthalten. Der vorgeschlagene Gehalt an Mg trägt zu einer verbesserten Zerspanbarkeit bei.According to a further embodiment, more than 0.5% Mg is contained. The proposed Mg content contributes to improved machinability.
Der Gehalt an Pb liegt zweckmäßigerweise im Bereich von 0,05 bis 0,09%. Der Gehalt an In beträgt weniger als 0,005%.The content of Pb is suitably in the range of 0.05 to 0.09%. The content of In is less than 0.005%.
Schließlich wird nach einer vorteilhaften Ausgestaltung vorgeschlagen, dass der Gehalt an Zn 40 bis 42,5% beträgt. Eine Legierung mit dem vorgeschlagenen Gehalt an Zn zeigt gute Zerspanungseigenschaften.Finally, according to an advantageous embodiment, it is proposed that the Zn content is 40 to 42.5%. An alloy with the proposed Zn content shows good machinability.
Die vorgeschlagene Blei- und Antimonfreie Messinglegierung ermöglicht überdies eine gute Verarbeitbarkeit im Stranggießverfahren.The proposed lead and antimony-free brass alloy also enables good processability in the continuous casting process.
Nachfolgend werden Ausführungsbeispiele der Erfindung anhand der Zeichnungen näher erläutert. Es zeigen:
- Fig. 1
- ein Spanbild nach Längsdrehen einer ersten Beispiellegierung,
- Fig. 2
- ein Spanbild nach Längsdrehen einer zweiten Beispiellegierung,
- Fig. 3
- ein Spanbild nach Längsdrehen einer dritten Beispiellegierung und
- Fig. 4
- ein Spanbild nach Längsdrehen einer vierten Beispiellegierung.
- 1
- a chip pattern after longitudinal turning of a first example alloy,
- 2
- a chip pattern after longitudinal turning of a second example alloy,
- 3
- a chip pattern after longitudinal turning of a third example alloy and
- 4
- a chip image after longitudinal turning of a fourth example alloy.
Die Spanbilder gemäß den
Wie aus
Durch den vorgeschlagenen Zusatz von 0,1 bis 1,5% Mg zu einer Blei- und Antimonfreien Messinglegierung kann also ein erheblich verbesserter Spanbruch erreicht werden. Die vorgeschlagene Messinglegierung zeichnet sich überdies durch eine geringe Warmversprödung aus. Sie kann mittels Warmumformung, insbesondere im Stranggießverfahren verarbeitet werden.The proposed addition of 0.1 to 1.5% Mg to a lead-free and antimony-free brass alloy means that chip breaking can be significantly improved. The proposed brass alloy is also characterized by low hot embrittlement. It can be processed by means of hot forming, in particular in the continuous casting process.
Claims (10)
wobei weniger als 0,15% As enthalten sind.Lead and antimony-free brass alloy according to claim 1,
containing less than 0.15% As.
wobei weniger als 0,15% P enthalten sind.Lead and antimony-free brass alloy according to one of the preceding claims,
containing less than 0.15% P.
wobei weniger als 0,1% AI enthalten sind.Lead and antimony-free brass alloy according to one of the preceding claims,
containing less than 0.1% AI.
wobei weniger als 0,1% Sn enthalten sind.Lead and antimony-free brass alloy according to one of the preceding claims,
containing less than 0.1% Sn.
wobei 57 bis weniger als 60%, vorzugsweise 57,5 bis 58,5% Cu, enthalten sind.Lead and antimony-free brass alloy according to one of the preceding claims,
containing 57 to less than 60%, preferably 57.5 to 58.5% Cu.
wobei mehr als 0,5% Mg enthalten sind.Lead and antimony-free brass alloy according to one of the preceding claims,
containing more than 0.5% Mg.
wobei 0,05 bis 0,09% Pb enthalten sind.Lead and antimony-free brass alloy according to one of the preceding claims,
containing 0.05 to 0.09% Pb.
wobei weniger als 0,005% In enthalten sind.Lead and antimony-free brass alloy according to one of the preceding claims,
containing less than 0.005% In.
wobei 40 bis 42,5% Zn enthalten sind.Lead and antimony-free brass alloy according to one of the preceding claims,
containing 40 to 42.5% Zn.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021119474.1A DE102021119474A1 (en) | 2021-07-27 | 2021-07-27 | Lead and antimony free brass alloy |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4124667A1 true EP4124667A1 (en) | 2023-02-01 |
Family
ID=82594778
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22184790.8A Pending EP4124667A1 (en) | 2021-07-27 | 2022-07-13 | Lead and antimony-free brass alloy |
Country Status (11)
Country | Link |
---|---|
US (1) | US20230035864A1 (en) |
EP (1) | EP4124667A1 (en) |
JP (1) | JP2023021941A (en) |
KR (1) | KR20230017150A (en) |
CN (1) | CN115679151A (en) |
AU (1) | AU2022209210A1 (en) |
BR (1) | BR102022014247A2 (en) |
DE (1) | DE102021119474A1 (en) |
IL (1) | IL295024A (en) |
MX (1) | MX2022009224A (en) |
ZA (1) | ZA202207823B (en) |
Citations (8)
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JPH06179932A (en) * | 1991-07-01 | 1994-06-28 | Nikko Kinzoku Kk | Copper alloy for conductive spring |
JPH08176707A (en) * | 1994-12-27 | 1996-07-09 | Sumitomo Electric Ind Ltd | Electrode wire for wire electric discharge machining |
CN101161836A (en) * | 2007-10-16 | 2008-04-16 | 中南大学 | Leadless easy-cutting magnesium brass alloy and method for preparing same |
EP2133437B1 (en) | 2008-06-11 | 2011-06-15 | Xiamen LOTA International Co., Ltd | Tin-free lead-free free-cutting magnesium brass alloy and its manufacturing method |
EP2913415A1 (en) | 2014-01-03 | 2015-09-02 | JiaXing IDC Plumbing & Heating Technology Ltd | Lead-free bismuth-free silicone-free brass |
EP2467507B1 (en) | 2009-08-18 | 2019-02-27 | Aurubis Stolberg GmbH & Co. KG | Brass alloy |
EP3320122B1 (en) | 2015-07-10 | 2020-08-12 | Aurubis Stolberg GmbH & Co. KG | Brass alloy |
WO2020261603A1 (en) | 2019-06-25 | 2020-12-30 | 三菱マテリアル株式会社 | Free-cutting copper alloy and method for manufacturing free-cutting copper alloy |
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CN101787461B (en) * | 2010-03-02 | 2014-11-19 | 路达(厦门)工业有限公司 | Environment-friendly manganese brass alloy and manufacturing method thereof |
JP5869422B2 (en) * | 2012-05-09 | 2016-02-24 | サンエツ金属株式会社 | Brass alloy with excellent high temperature brittleness resistance |
DE102013107011A1 (en) * | 2013-07-03 | 2015-01-08 | Thyssenkrupp Steel Europe Ag | Process for coating long Cu products with a metallic protective layer and a Cu long product provided with a metallic protective layer |
CN112226645B (en) * | 2020-09-03 | 2021-11-30 | 宁波金田铜业(集团)股份有限公司 | Lead-free-cutting brass and preparation method thereof |
-
2021
- 2021-07-27 DE DE102021119474.1A patent/DE102021119474A1/en active Pending
-
2022
- 2022-07-13 EP EP22184790.8A patent/EP4124667A1/en active Pending
- 2022-07-14 ZA ZA2022/07823A patent/ZA202207823B/en unknown
- 2022-07-19 BR BR102022014247-5A patent/BR102022014247A2/en unknown
- 2022-07-24 IL IL295024A patent/IL295024A/en unknown
- 2022-07-25 AU AU2022209210A patent/AU2022209210A1/en active Pending
- 2022-07-26 MX MX2022009224A patent/MX2022009224A/en unknown
- 2022-07-26 JP JP2022119059A patent/JP2023021941A/en active Pending
- 2022-07-26 CN CN202210881217.2A patent/CN115679151A/en active Pending
- 2022-07-27 KR KR1020220093072A patent/KR20230017150A/en unknown
- 2022-07-27 US US17/874,712 patent/US20230035864A1/en active Pending
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JPH06179932A (en) * | 1991-07-01 | 1994-06-28 | Nikko Kinzoku Kk | Copper alloy for conductive spring |
JPH08176707A (en) * | 1994-12-27 | 1996-07-09 | Sumitomo Electric Ind Ltd | Electrode wire for wire electric discharge machining |
CN101161836A (en) * | 2007-10-16 | 2008-04-16 | 中南大学 | Leadless easy-cutting magnesium brass alloy and method for preparing same |
EP2133437B1 (en) | 2008-06-11 | 2011-06-15 | Xiamen LOTA International Co., Ltd | Tin-free lead-free free-cutting magnesium brass alloy and its manufacturing method |
EP2467507B1 (en) | 2009-08-18 | 2019-02-27 | Aurubis Stolberg GmbH & Co. KG | Brass alloy |
EP2913415A1 (en) | 2014-01-03 | 2015-09-02 | JiaXing IDC Plumbing & Heating Technology Ltd | Lead-free bismuth-free silicone-free brass |
EP3320122B1 (en) | 2015-07-10 | 2020-08-12 | Aurubis Stolberg GmbH & Co. KG | Brass alloy |
WO2020261603A1 (en) | 2019-06-25 | 2020-12-30 | 三菱マテリアル株式会社 | Free-cutting copper alloy and method for manufacturing free-cutting copper alloy |
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Title |
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ADINEH MORTEZA ET AL: "Microstructure, mechanical properties and machinability of Cu-Zn-Mg and Cu-Zn-Sb brass alloys", MATERIALS SCIENCE AND TECHNOLOGY, vol. 35, no. 12, 19 June 2019 (2019-06-19), GB, pages 1504 - 1514, XP093005147, ISSN: 0267-0836, Retrieved from the Internet <URL:https://www.tandfonline.com/doi/pdf/10.1080/02670836.2019.1630089?needAccess=true> DOI: 10.1080/02670836.2019.1630089 * |
HARUHIKO ATSUMI ET AL: "Fabrication and properties of high-strength extruded brass using elemental mixture of Cu40% Zn alloy powder and Mg particle", MATERIALS CHEMISTRY AND PHYSICS, ELSEVIER SA, SWITZERLAND, TAIWAN, REPUBLIC OF CHINA, vol. 135, no. 2, 6 May 2012 (2012-05-06), pages 554 - 562, XP028414791, ISSN: 0254-0584, [retrieved on 20120512], DOI: 10.1016/J.MATCHEMPHYS.2012.05.025 * |
LEE DONG-BOK ET AL: "The effect of small additions of Zr, Cr, Mg, Al, and Si on the oxidation of 6:4 brass", METALS AND MATERIALS INTERNATIONAL, vol. 8, no. 3, 31 May 2002 (2002-05-31), Seoul, pages 327 - 332, XP093005172, ISSN: 1598-9623, Retrieved from the Internet <URL:https://link.springer.com/content/pdf/10.1007/BF03186103.pdf> DOI: 10.1007/BF03186103 * |
Also Published As
Publication number | Publication date |
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IL295024A (en) | 2023-02-01 |
AU2022209210A1 (en) | 2023-02-16 |
ZA202207823B (en) | 2023-04-26 |
DE102021119474A1 (en) | 2023-02-02 |
JP2023021941A (en) | 2023-02-14 |
KR20230017150A (en) | 2023-02-03 |
BR102022014247A2 (en) | 2023-02-07 |
US20230035864A1 (en) | 2023-02-02 |
CN115679151A (en) | 2023-02-03 |
MX2022009224A (en) | 2023-01-30 |
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