Obrabotka Metallov 2014 No. 3

ОБРАБОТКА МЕТАЛЛОВ № 3 (64) 2014 12 МАТЕРИАЛОВЕДЕНИЕ 7. Бабичев М.А. Методы определения внутрен- них напряжений в деталях машин. – М.: Акад. наук СССР, 1955. – 150 с. 8. Соколов И.А., Уральский В.И. Остаточные на- пряжения и качество металлопродукции. – М.: Ме- таллургиздат, 1981. – 300 с. 9. Бобылев А.В. Растрескивание медных сплавов: справочник. – М.: Металлургия, 1993. – 352 с. 10. Курбаткин И.И., Пружинин И.Ф., Фалкон В.И. Влияние химического состава и режимов обрабо- ток на механические и эксплуатационные свойства кремнисто-марганцовистых латуней // Цветные ме- таллы. – 1996. – № 9. – С. 60–63. 11. Пугачева Н.Б. Структура промышленных (  + β)-латуней // Металловедение и термическая об- работка металлов. – 2007. – № 2. – С. 23–29. 12. Pugacheva N.B. Structure of commercial α + β brasses // Metal Science and Heat Treatment. – 2007. – Vol. 49, iss. 1-2. – P. 67–74. 13. Structural and phase transformations in α + β brasses / N.B. Pugacheva, A.A. Pankratov, N.Yu. Fro- lova, I.V. Kotlyarov // Russian Metallurgy (Metally). – 2006. – Vol. 2006, iss. 3. – P. 239–248. 14. Структурные и фазовые превращения в α+β- латунях / Н.Б. Пугачева, А.А. Панкратов, Н.Ю. Фро- лова, И.В. Котляров // Металлы. – 2006. – № 3. – С. 65–75. 15. Сучков Д.И. Медь и ее сплавы. – М.: Метал- лургия, 1967. – 248 с. OBRABOTKAMETALLOV (METAL WORKING AND MATERIAL SCIENCE) N 3(64), July – September 2014, Pages 6–13 Analysis of α-grain uniformly distributed over the cross section of pipe billets 58Cu-34Zn-3Mn-2Al alloy Pugacheva N.B. 1 , D.Sc. (Engineering), e-mail: nat@imach.uran.ru Lebed A.V. 2 , Principal Engineer, e-mail: annalebed5@rambler.ru 1 Institute of EngineeringScienceUral Branch of RussianAcademy of Sciences, 34Komsomolskaya str.,Yekaterinburg, 630049, Russian Federation 2 JSC “Revda Non-Ferrous Metals Processing Works”, Settlement “SUMZ”, Revda, Sverdlovsk region, 623280, Russian Federation Abstract The influence of the heating temperature during the heat treatment of the alloy tube billets 58Сu-34Zn-3Mn- 2Al after extrusion on the quantity of α-phase is investigated, and an analysis of the distribution of α-grains in the cross section of billets is carried out. It is established that the most uniform distribution is achieved by α-grains after heating the pipe blanks to 450 ° C, holding for 3 hours with the next air cooling. As a result of the work, the causes of uneven distribution of α-phase is found, also a recommendation for its reduction throughout the length of pipes is given. A correlation between the amount of α-phase, after extrusion and after aging is marked. The possibility of using software packages SIAMS type 700 when calculating the amount of α-phase is analyzed. Keywords: brass, microstructure, alpha-phase, aging, distribution, software system. References 1. Kolachev B.A., Elagin V.I., Livanov V.A. Metallovedenie i termicheskaya obrabotka tsvetnykh metallov i splavov [Metallurgy and heat treatment of non-ferrous metals and alloys]. 4th ed. Moscow, MIMIM Publ., 2005. 432 p. 2. Lyakishev N.P., Bannykh O.A., Rokhlin L.L., Alisova S.P., Bochvar N.R., Budrerg P.B. et al. Diagrammy sostoyaniya dvoinykh metallicheskikh sistem. Spravochnik v 4 t. T. 3 [Diagrams of binary metallic systems. Reference book in 4 vol., vol. 3]. Moscow, Mashinostroenie Publ., 1996. 569 p.