“Tsvetmetobrabotka Institute” JSC, Moscow, Russia

A. K. Nikolaev, Head of Laboratory, e-mail: post@cmet.ru
G. V. Ashikhmin, First Deputy Chief Executive Officer
N. I. Revina, Senior Researcher

It is investigated the influence of temperature regime of deformation, tempering and aging on structure and properties of large goods from beryllium bronze of responsible purpose. Beryllium bronze by aging is characterised on a level with usual homogeneous, interrupted desintegration resaturated solid. Structure formated in the result of eutectoid interrupted desintegration look like comparatively rough structure of perlite type. Strength properties and plasticity goods from beryllium bronze depends on share of desintegration in structure and is reduced noticeably by it increase. At the same time eutectoid conversion can be eliminate in the case if the temperature of heating of goods before forging will not exceed the temperature of eutectoid conversion. It shows possibility such low temperature heating for successfully realization of forging operation. It is offered the temperature regime of forging, tempe ring and aging of large goods which allow to ensure the set combination of mechanical properties. Heating before forging is recommended to carry out below the temperature of eutectoid conversion and finish of forging by temperature approximately 500 ^оC. In this case the tempering of goods is carrying out from temperature 800±10 ^оC (exposure by temperature not less than 1.5 h) in water and aging is carrying out by the temperature 400±10 ^оC during 2 h.

1. Pastukhova Zh. P., Rakhshtadt A. G. Pruzhinnye splavy tsvetnykh metallov (Spring alloys of non-ferrous metals). Moscow : Metallurgiya, 1983. 364 p.
2. Duraev P. P., Kaplun Yu. A., Pastukhova Zh. P. et al. Metallovedenie i termicheskaya obrabotka metallov — Metal Science and Heat Treatment. 1985. No. 8. pp. 63–64.
3. Masyukov V. P., Pastukhova Zh. P. Metallovedenie i termicheskaya obrabotka metallov — Metal Science and Heat Treatment. 1985. No. 4. pp. 42–75.
4. Diagrammy sostoyaniya dvoynykh metallicheskikh sistem : spravochnik. V trekh tomakh (Structural diagrams of double metallic systems : reference book. In three volumes). Under the editorship of N. P. Lyakishev et al. Moscow : Mashinostroenie, 1996–2000. 3816 p.
5. Novikov I. I. Teoriya termicheskoy obrabotki metallov (Theory of thermal treatment of metals). Moscow : Metallurgiya, 1986. 480 p.
6. Entwisle A. R., Wynn J. R. Precipitation in Commercial Copper-Berillium Alloys. Journal of the Institute of Metals. 1960–1961. Vol. 89. pp. 24–29.
7. Rozenberg V. M., Dzutsev V. T. Diagrammy izotermicheskogo raspada v splavakh na osnove medi : spravochnik (Diagrams of isothermal dissociation in the copper-based alloys : reference book). Moscow : Metallurgiya, 1989. 326 p.
8. Tsubakino H., Nozato R. On the Cell Growth of Discontinuous Precipitate in Cu–Be Alloys. Journal of the Japan Institute of Metals. 1979. Vol. 43, No. 4. pp. 42–48.
9. Borchers H., Schulz H. Erscheinungen diskontinuierlicher Ausscheidung in eine verformten Kupferlegilrungen mit 1,5 Gew. % Be. Zeitschrift Metallkunde. 1975. Bd. 36. S. 528–533.
10. Chernyakova L. E., Patseka R. F., Vorontsov N. M. et al. Fizika metallov i metallovedenie — The Physics of Metals and Metallography. 1979. Vol. 48, Iss. 3. pp. 575–579.
11. Hagiwara H., Tsubakino H., Nozato R. Discontinuous Precipitation in Cu–2,1 wt. % Be Alloy. Journal of the Japan Institute of Metals. 1977. Vol. 41, No. 12. pp. 1310–1316.
12. Krege N., Nocker N., Terlinder G. Schrumpfung und Verzug beim Aushärten von Kupfer-Berillium-Legierungen. Metall. 1975. Jg. 29, No. 11. S. 1118–1121.