Журналы →  Tsvetnye Metally →  2014 →  №6 →  Назад

METAL PROCESSING
Название Research of influence of two-stage thermal processing temperatures on microstructure and mechanical properties of forged pieces, made of VT43 (ВТ43) alloy
Автор Dinmukhametova D. I., Nochovnaya N. A., Tarasenko E. N.
Информация об авторе

All-Russian Scientific Research Institute of Aviation Materials, Moscow, Russia:
D. I. Dinmukhametova, Engineer
N. A. Nochovnaya, Head of Laboratory, e-mail: nochovnaya_viam@mail.ru
E. N. Tarasenko, Leading Engineer

Реферат

The main properties of half-finished titanium product are mainly estimated by fabrication technique. This is connected with a structure, formed during the hot deformation and heat treatment, making an influence on properties (especially on properties of high-strength titanium alloys). Researches were carried out on plates, manufactured by original technology in conditions of “VSMPO-AVISMA” Corporation. Technology of high-strength titanium half-finished products fabrication includes the basic stages: cast structure grinding by uniform beta-deformation; deformation in (α + β)-area for obtaining of hot-cold work; heating and deformation in β-area for recrystallization process; and final (α + β)-deformation. Due to the type of half-finished product and structural and property requirements, the foregoing stages can be repeated several times, which leads to intensification of recrystallization process and helps to obtain a fine-grained and homogeneous macro- and microstructure. Content of oxygen, carbon, hydrogen and nitrogen was defined in researched smelting samples. Being the (α + β)-alloy, VT43 (ВТ43) alloy was hardened by heat treatment, which basic purpose is saving of metastable β-, α'- and α''-phases by rapid cooling and their following decomposition in the time of aging with precipitation of α- and β-phases. At the same time, the hardening effect is better, with increased amount and dispersion of metastable phases, fixed after rapid cooling. The structure and phase composition of samples after quenching and aging was studied. Mechanical tests were carried out. There is shown that application of optimal heat treatment provides the obtaining of ultimate strength of not lesser than 1200 MPa.

Ключевые слова Structural alloy, weldable alloy, titanium alloy, martensite type, thermal treatment, phase composition, plates, microstructure, quenching, aging
Библиографический список

1. Kablov E. N., Khorev A. I., Nochovnaya N. A. Sposob termomekhanicheskoy obrabotki titanovykh splavov (Method of thermal-mechanical processing of titanium alloys). Patent RF, No. 2368699. Applied : November 08, 2007. Published : September 27, 2009.
2. Kablov E. N. Aviatsionnye materialy i tekhnologii — Aviation materials and technologies. 2012. No. 5. pp. 7–17.
3. Kablov E. N. Nauka i zhizn — Science and life. 2012. No. 6. pp. 14–18.
4. Kablov E. N., Khorev A. I., Nochovnaya N. A. Sposob termomekhanicheskoy obrabotki izdeliy iz titanovykh splavov (Method of thermal-mechanical processing of products, made of titanium alloys). Patent RF, No. 2318076. Applied : September 18, 2006. Published : February 27, 2008.
5. Khorev A. I. Trudy Vserossiyskogo nauchno-issledovatelskogo instituta aviatsionnykh materialov — Proceedings of All-Russian Scientific Research Institute of Aviation Materials. 2013. No. 2. Available at : http://viam-works.ru/ru/articles?art_id=12.
6. Nochovnaya N. A., Ivanov V. I., Alekseev E. B., Kochetkov A. S. Aviatsionnye materialy i tekhnologii — Aviation materials and technologies. 2012. No. 5. pp. 157–167.
7. Kablov E. N., Khorev A. I., Nochovnaya N. A., Tarasenko E. N. Sposob termomekhanicheskoy obrabotki izdeliy iz titanovykh splavov (Method of thermal-mechanical processing of products from titanium alloys). Patent RF, No. 2457273. Applied : April 05, 2011. Published : July 27, 2012.
8. GOST 28052–97. Titan i titanovye splavy. Metody opredeleniya kisloroda (State Standard 28052–97. Titanium and titanium alloys. Methods of definition of oxyen). Introduced: January 01, 1999.
9. GOST 24018.7–97. Splavy zharoprochnye na nikelevoy osnove. Metody opredeleniya ugleroda (State Standard 24018.7–97. Heat-resistant nickel-based alloys. Methods of definition of carbon). Introduced: July 01, 1992.
10. OST 1-90034–81. Splavy titanovye. Metod spektralnogo opredeleniya soderzhaniya vodoroda (All-Union Standard 1-90034–81. Titanium alloys. Method of spectral definition of hydrogen content). Introduced: July 01, 1982.
11. OST 1-90013–81. Splavy titanovye. Marki (All-Union Standard 1-90013–81. Titanium alloys. Grades). Introduced: July 01, 1981.
12. Khorev A. I. Vestnik mashinostroeniya — Mechanical Engineering Bulletin. 2010. No. 5. pp. 26–34.
13. Belov S. P., Brun M. Ya., Glaunov S. G. et al. Titanovye splavy. Metallovedenie titana i ego splavov (Titanium alloys. Metal science of titanium and its alloys). Under the editorship of B. A. Kolachev and S. G. Glazunov. Moscow : Metallurgiya, 1992. 352 p.
14. Khorev A. I. Vestnik mashinostroeniya — Mechanical Engineering Bulletin. 2009. No. 9. pp. 22–29.
15. Stefansson N., Semiatin S. L., Eylon D. The kinetics of static globularization of Ti – 6Al – 4V. Metallurgical and materials transactions. 2002. Vol. 33A. pp. 3527–3534.
16. Khorev A. I. Titanovye splavy dlya aviakosmicheskoy tekhniki i perspektivy ikh razvitiya (Titanium alloys for aerospace technics and prospects of their development). Aviatsionnye materialy i tekhnologii — Aviation materials and technologies. 2002. pp. 11–32.
17. Phelan D., Reid M., Stanford N. In-situ observations of phase transformations in titanium. JOM. 2006. No. 9. pp. 67–69.
18. Khorev A. I. Tekhnologiya mashinostroeniya — Mechanical engineering technology. 2007. No. 2. pp. 29–34.
19. Antipov V. V. Strategiya razvitiya titanovykh, magnievykh, berillievykh i alyuminievykh splavov (Strategy of development of titanium, magnesium, berillium and aluminium alloys). Aviatsionnye materialy i tekhnologii — Aviation materials and technologies. 2012. pp. 157–167.
20. Khorev M. A., Khorev A. I. Materialovedenie — Materials Science. 2005. No. 7. pp. 25–34.
21. Nochovnaya N. A., Alekseev E. B., Izotova A. Yu., Novak A. V. Titan — Titanium. 2012. No. 4. pp. 42–46.
22. Kablov E. N., Khorev A. I., Nochovnaya N. A. Splav na osnove titana i izdelie, vypolnennoe iz nego (Titanium-based alloy and product, made of this alloy). Patent RF, No. 2356976. Applied : June 06, 2007. Published : May 27, 2009.
23. GOST 1497–84. Metally. Metody ispytaniy na rastyazhenie (State Standard 1497–84. Metals. Tension test methods). Introduced: January 01, 1986.
24. GOST 9454–78. Metally. Metod ispytaniya na udarnyy izgib pri ponizhennykh, komnatnoy i povyshennykh temperaturakh (State Standard 9454–78. Metals. Impact bending test in the time of lowered, room and increased temperatures). Introduced: January 01, 1979.

Language of full-text русский
Полный текст статьи Получить
Назад