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METAL PROCESSING
Название Understanding the effect of annealing temperature on the mechanical properties of thin strips made from CuNi12Zn24 alloy going through a continuous line
DOI 10.17580/tsm.2021.06.12
Автор Tolstobrov A. K., Shatalov R. L., Budneva T. V., Agafonov A. A.
Информация об авторе

Moscow Polytechnic University, Moscow, Russia:

R. L. Shatalov, Professor at the Department of Material Forming and Additive Technology, Doctor of Technical Sciences, e-mail: mmomd@mail.ru


Kirov Non-Ferrous Metals Processing Plant JSC, Kirov, Russia:

A. K. Tolstobrov, Chief Metallurgist, e-mail: tolstobrovak@gmail.com
T. V. Budneva, Lead Research Engineer
A. A. Agafonov, Deputy Chief Engineer – Head of the Engineering Department

Реферат

Alloys of copper with nickel (5–35%) and zinc (13–45%) are known, which are called nickel silver (translated from German Neusilber – “new silver”). The alloy CuNi15Zn20 is widely used. Industry uses materials similar in properties to the alloy CuNi15Zn20, but cheaper due to the reduction in the content of nickel and copper, for example, CuNi12Zn24. Under the conditions of Kirov Non-Ferrous Metals Processing Plant (JSC “KNFMP”), there is a technical possibility to obtain products from ingots to thin strip from these alloys. To obtain thin strips 0.7–0.043 mm thick in a soft state with a uniform distribution of mechanical properties along both length and width, as well as with a high surface quality, a continuous annealing line is used. The line is usually used for annealing thin strips of copper and brass of various alloy grades. The work was carried out on the selection of temperature and speed modes of the line for heat treatment of tapes from the alloy CuNi12Zn24, not typical of the line, in order to obtain products that meet consumer requirements. The effect of annealing temperature on the change in the mechanical properties of a cold-rolled strip 0.1 mm thick made of the alloy CuNi12Zn24 was studied. The graphs of changes in the yield strength (σt), tensile strength (σb) and elongation (δ) versus annealing temperature (t) of the strip after cold rolling with a relative compression of 83% on a four-roll reversible mill 160/650×710 are obtained. The regularities are established and the dependences of the main indicators of the mechanical properties on the temperature of annealing of strips are obtained. The research results made it possible to develop a rational heat treatment regime on the continuous annealing line of JSC “KNFMP”. Application of the developed annealing regime made it possible to manufacture and supply to the European consumer an experimental batch of tapes with a cross section of 0.1×400 mm in the soft state from the alloy CuNi12Zn24 according to the standard EN 1652-97 in the amount of 1000 kg. There were no comments from the consumer about quality of the strips; currently, orders for the production of these products continue to be received at JSC “KNFMP”.

Ключевые слова CuNi12Zn24 alloy, nickel silver, continuous annealing, continuous annealing line, mechanical properties, temperature, thin strips
Библиографический список

1. GOST 492–2006. Nickel, nickel and copper-nickel alloys treated by pres sure. Grades. Introduced: 01.01.2008. Moscow : Izdatelstvo standartov, 2006.
2. Osintsev O. E., Fedorov V. N. Copper and copper alloys. National and international grades: Reference book. Moscow : Mashinostroenie, 2004. 336 p.
3. Raykov Yu. N., Ashikhmin G. V., Polukhin V. P., Gulyaev A. S. Copper alloys. Grades, properties, application: Reference book. Moscow : OAO “Institut Tsvetmetobrabotki”, 2011. 456 p.
4. EN 1652–97. Copper and copper alloys — Plate, sheet, strip and circles for general purposes. Published: 20.08.1997. EU. : European Committee for Stan dardization.
5. Tretiakov A. V., Zyuzin V. I. The mechanical properties of metals and alloys under forming: Reference book. 2nd edition. Moscow : Metallurgiya, 1973. 224 p.
6. Smiryagin A. P., Smiryagina N. A., Belova A. V. Commercial non-ferrous metals and alloys: Reference book. 3rd edition. Moscow : Metallurgiya, 1974. 488 p.
7. Pevzner M. Z. Induction heat treatment as a way to control coldrolled strip transverse profile. Tsvetnye Metally. 2019. No. 6. pp. 78–84. DOI: 10.17580/ tsm.2019.06.11.
8. Demin A. V. Automation of a new process of control of pressure metal heat treatment for obtaining of rolled products with wide consumer properties. Tsvetnye Metally. 2016. No. 4. pp. 76–81. DOI: 10.17580/tsm.2016.04.13.
9. GOST 546–2001. Copper cathodes. Specifications. Introduced: 01.03.2002. Moscow : Izdatelstvo standartov, 2001.
10. GOST 3640–94. Zinc. Specifications. Introduced: 01.01.1997. Moscow : Izdatelstvo standartov, 1994.
11. TU 1732-126-48200234–2015. Primary nickel in the form of cathode sheets and briquettes.
12. GOST 11701–84. Metals. Methods of tensile testing of thin sheets and strips. Introduced: 01.01.1986. Moscow : Izdatelstvo standartov, 1984.
13. Borovikov V. P. A popular introduction to the modern data analysis in Statistica. Moscow : StatSoft Russia, 2019. 288 p.
14. GOST 28873–90. Alloys on the basis of heavy non-ferrous metals treated under pressure. Introduced: 01.01.1992. Moscow : Izdatelstvo standartov, 1990.
15. Spittel M, Spittel Th. Flow stress, mechanical and physical properties of CuNi12Zn24. Non-ferrous alloys – heavy metals. Part 3. Landolt-Börnstein – Group VIII Advanced Materials and Technologies. 2016. pp. 307–311.
16. Samoshina M. E., Chervyakova K. Yu., Aleshchenko A. S., Mirzomustakimov M. M. Structure, mechanical properties аnd deformation ability of ingots and flat products of the alloy Al – 6 % Cu – 2 % B. Tsvetnye Metally. 2018. No. 12. pp. 59–67. DOI: 10.17580/tsm.2016.12.13.
17. Pevzner M. Z. Process techniques for improving the homogeneity of properties in rolled steel annealed in transverse magnetic field. Tsvetnye Metally. 2019. No. 5. pp. 81–88. DOI: 10.17580/tsm.2019.05.10.
18. Figurovskiy D. K. Effect of electromagnetic field on the structure of German silver during crystallization. Tsvetnye Metally. 2007. No. 2. pp. 121–125.
19. Baraz V. V., Gerasimov S. S., Sedelnikova A. O., Gruzdeva I. A. Influence of doping and crystallization regimes on forming of structure, casting and mechanical properties of a Cu – Ni – Zn system alloy. Tsvetnye Metally. 2017. No. 8. pp. 72–76. DOI: 10.17580/tsm.2017.08.11.
20. Zinoviev A. V., Kolpashnikov A. I., Polukhin P. I. et al. The process of forming non-ferrous metals and alloys. Moscow : Metallurgiya, 1992. 512 p.
21. Radwanski K., Kuziak R., Rozmus R. Structure and mechanical properties of dual-phase steel following heat treatment simulations reproducing a continuous annealing line. Archives of Civil and Mechanical Engineering. 2019. Vol. 19, Iss. 2. pp. 453–468.
22. Rooy A., Van Royen E. W., Bronsveld P. M., Hosson J. Th. M. The coherent phase diagram of Cu – Ni – Zn. Acta Metallurgica. 1980. Vol. 28, Iss. 10. pp. 1339–1347.
23. Jiang M., Wang C. P., Liu X. J., Ohnuma I., Kainuma R. et. al. Thermodynamic calculation of phase equilibria in the Cu – Ni – Zn system. Journal of Physics and Chemistry of Solids. 2005. Vol. 66, Iss. 2–4. pp. 246–250.
24. EN1652–97. Plates, shects, strips and rounds of copper and copper allous of general purpose. — Introduced 01.03.1998. — M. : Standartinform, 1998.

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