RESTORATION OF THE PROPERTIES OF CICULATION PUMPS BLADES METALS BY SURFACE ULTRASONIC IMPACT TREATMENT
During the transition period to a market economy, factoryies- manufacturers of equipment for the nuclear industry became lame duck companies. The Mmarket of for heavy industry equipment reduced dramatically, quality control requirements imposed to on the goods became lowered. Deviations from regula...
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| Format: | Article |
| Language: | English |
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Voronezh State University
2017-06-01
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| Series: | Конденсированные среды и межфазные границы |
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| _version_ | 1811218834230607872 |
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| author | Povarov Vladimir P. Urazov Oleg V. Bakirov Murat B. Pakhomov Sergey S. |
| author_facet | Povarov Vladimir P. Urazov Oleg V. Bakirov Murat B. Pakhomov Sergey S. |
| author_sort | Povarov Vladimir P. |
| collection | DOAJ |
| description | During the transition period to a market economy, factoryies- manufacturers of equipment for the nuclear industry became lame duck companies. The Mmarket of for heavy industry equipment
reduced dramatically, quality control requirements imposed to on the goods became lowered. Deviations from regulations requirements, technical specifi cations for equipment manufacture, resulted in an inevitable decrease of reliability not only during operations stage but also during check teststests. It is not always possible to promptly replace non-conforming equipment, in such cases it is required to apply compensatory measures to restore properties up to an acceptable level in order to ensure
operational reliability due to the strength improvement of equipment parts and structures during the whole service life or up to the scheduled date of equipment replacement.
This paper is dedicated to the development and practical implementation of surface ultrasonic treatment restoration technology used for working with the metal wheels blades metal of circulation pumps of type 16DPA10-28 located at Novovoronezh NPP-2 unit pump station 10URS. Dynamic surface treatment was implemented to compensate for the process fl aws of the metal blades metal. It was demonstrated that impact elastic-plastic deformation has a comprehensive compensation impact on
the metal blades metal of the equipment’s initial state and creates a surface hardening layer of 1,.5 mm with higher strength properties. Surface strain hardening increases the cyclic strength, re-distributes the benefi cially residual process and maintenance stress, as well as heals repairing minor surface cracks
improving the surface quality. The developed technology was used for the treatment of 32 blades of circulation pumps 10PAC01AP001, 10PAC02AP001, 10PAC03AP001, 10PAC04AP001 working wheels. 100-hours tests in situ proved the high effi ciency of the developed technology and allow us
to recommend its application at during the stage of blades manufacture of the blades as well as during the operational lifetime of the pumps operation with the a view to extending their service life. |
| first_indexed | 2024-04-12T07:16:09Z |
| format | Article |
| id | doaj.art-74fbdc13e7704792a999403566094c3e |
| institution | Directory Open Access Journal |
| issn | 1606-867X 1606-867X |
| language | English |
| last_indexed | 2024-04-12T07:16:09Z |
| publishDate | 2017-06-01 |
| publisher | Voronezh State University |
| record_format | Article |
| series | Конденсированные среды и межфазные границы |
| spelling | doaj.art-74fbdc13e7704792a999403566094c3e2022-12-22T03:42:27ZengVoronezh State UniversityКонденсированные среды и межфазные границы1606-867X1606-867X2017-06-0119227328110.17308/kcmf.2017.19/202RESTORATION OF THE PROPERTIES OF CICULATION PUMPS BLADES METALS BY SURFACE ULTRASONIC IMPACT TREATMENTPovarov Vladimir P. 0Urazov Oleg V.1Bakirov Murat B.2Pakhomov Sergey S.3Cand. Sci. (Eng.), Director of the Novonoronezh NPPHead of Department of Metals Defectoscopy and Technical Control of the Novonoronezh NPPDr. Sci. (Eng.), Director-general of CMSLM Ltd.Acting Head of the Laboratory of CMSLM Ltd.During the transition period to a market economy, factoryies- manufacturers of equipment for the nuclear industry became lame duck companies. The Mmarket of for heavy industry equipment reduced dramatically, quality control requirements imposed to on the goods became lowered. Deviations from regulations requirements, technical specifi cations for equipment manufacture, resulted in an inevitable decrease of reliability not only during operations stage but also during check teststests. It is not always possible to promptly replace non-conforming equipment, in such cases it is required to apply compensatory measures to restore properties up to an acceptable level in order to ensure operational reliability due to the strength improvement of equipment parts and structures during the whole service life or up to the scheduled date of equipment replacement. This paper is dedicated to the development and practical implementation of surface ultrasonic treatment restoration technology used for working with the metal wheels blades metal of circulation pumps of type 16DPA10-28 located at Novovoronezh NPP-2 unit pump station 10URS. Dynamic surface treatment was implemented to compensate for the process fl aws of the metal blades metal. It was demonstrated that impact elastic-plastic deformation has a comprehensive compensation impact on the metal blades metal of the equipment’s initial state and creates a surface hardening layer of 1,.5 mm with higher strength properties. Surface strain hardening increases the cyclic strength, re-distributes the benefi cially residual process and maintenance stress, as well as heals repairing minor surface cracks improving the surface quality. The developed technology was used for the treatment of 32 blades of circulation pumps 10PAC01AP001, 10PAC02AP001, 10PAC03AP001, 10PAC04AP001 working wheels. 100-hours tests in situ proved the high effi ciency of the developed technology and allow us to recommend its application at during the stage of blades manufacture of the blades as well as during the operational lifetime of the pumps operation with the a view to extending their service life.plastic strainsurface defectresidual welding stressultrasonic impact treatmentcirculation pump. |
| spellingShingle | Povarov Vladimir P. Urazov Oleg V. Bakirov Murat B. Pakhomov Sergey S. RESTORATION OF THE PROPERTIES OF CICULATION PUMPS BLADES METALS BY SURFACE ULTRASONIC IMPACT TREATMENT Конденсированные среды и межфазные границы plastic strain surface defect residual welding stress ultrasonic impact treatment circulation pump. |
| title | RESTORATION OF THE PROPERTIES OF CICULATION PUMPS BLADES METALS BY SURFACE ULTRASONIC IMPACT TREATMENT |
| title_full | RESTORATION OF THE PROPERTIES OF CICULATION PUMPS BLADES METALS BY SURFACE ULTRASONIC IMPACT TREATMENT |
| title_fullStr | RESTORATION OF THE PROPERTIES OF CICULATION PUMPS BLADES METALS BY SURFACE ULTRASONIC IMPACT TREATMENT |
| title_full_unstemmed | RESTORATION OF THE PROPERTIES OF CICULATION PUMPS BLADES METALS BY SURFACE ULTRASONIC IMPACT TREATMENT |
| title_short | RESTORATION OF THE PROPERTIES OF CICULATION PUMPS BLADES METALS BY SURFACE ULTRASONIC IMPACT TREATMENT |
| title_sort | restoration of the properties of ciculation pumps blades metals by surface ultrasonic impact treatment |
| topic | plastic strain surface defect residual welding stress ultrasonic impact treatment circulation pump. |
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