Sorting nipple castings from malleable cast iron from the result of measuring their residual magnetization
https://doi.org/10.21122/1683-6065-2018-4-55-64
Abstract
The physical principles of magnetic control of the structure of malleable cast iron compact castings are summarized. It reports on the technical features and mode of operation of the automated instrument used for control. The features of formation of remanent magnetization of unhealed castings of nipples from malleable cast iron with bleached surface layer, features of the influence of changes in the layer thickness on the result of magnetization of the castings are established. A criterion for sorting castings with thickness of the bleached layer was developed based on the result of measuring its residual magnetization a given. Recommendations on its use when adjusting the rejection limit for automated magnetic sorting of castings by structure at the Minsk plant of heating equipment are given.
About the Author
S. G. Sandomirski
Joint Institute of Mechanical Engineering of the NAS of Belarus
Belarus
Minsk, Belarus, 12, Academicheskaya str.
Belarus
Minsk, Belarus, 12, Academicheskaya str.
References
1. Shherbedinskij G. V. Chugun kak perspektivnyj material 21 stoletija [Cast as a promising material of the 21st century]. Materialovedenie i termicheskaja obrabotka metallov = Materials Science and heat treatment of metals, 2005, no. 7, pp. 83–93.
2. Bunin K. P. Stroenie chuguna [The structure of cast iron]. Moscow, Metallurgija Publ., 1972, 160 p.
3. Otlivki iz chuguna s razlichnoj formoj grafita. Metody opredelenija struktury [Castings from cast iron with various forms of graphite. Methods for determining the structure]. GOST 3443–87. Moscow, Standartinform, 2005, 42 p.
4. Fridman Ja. B. Mehanicheskie svojstva metallov [Mechanical properties of metals]. Moscow, Mashinostroenie Publ., 1972. Chast’ 1. Deformacija i razrushenie [Deformation and destruction], 472 p. Chast’ 2. Mehanicheskie ispytanija. Konstrukcionnaja prochnost’ [Mechanical tests. Structural strength], 368 p.
5. Bolohvitinov N. F., Bolohvitinova E. N. Atlas makroi mikrostruktur metallov i splavov [Atlas of macro-and microstructures of metals and alloys] Izdanie 2-e, pererabotannoe i dopolnennoe. Moscow, MAShGIZ Publ., 1959, 88 p.
6. Gorkunov Je. S., Somova V. M., Nichipuruk A. P. Magnitnye svojstva i metody kontrolja struktury i prochnostnyh harakteristik chugunnyh izdelij (obzor) [Magnetic properties and methods of control structure and strength properties of cast iron products (overview)]. Defektoskopija = Russian journal of nondestructive testing, 1994, no. 10, pp. 54–82.
7. Sandomirskij S. G. Osobennosti svjazej magnitnyh svojstv chugunov s ih strukturoj i magnitnye metody kontrolja struktury chugunnyh otlivok (obzor) [Features of the relationship of the magnetic properties of cast iron with their structure and magnetic methods for monitoring the structure of iron castings (review)]. Lit’e i metallurgija = Foundry production, 2016, no. 4, pp. 96–107.
8. Mes’kin V. S., Somin B. E. Jelektrotehnicheskie chuguny [Electrotechnical cast iron]. Moscow, Gosenergoizdat Publ., 1935, 135 p. 9. Sandomirskij S. G. Ustrojstvo dlja sortirovki tel kachenija [A device for sorting rolling elements]. Avtorskoe svidetel’stvo SSSR № 1801623, 1993.
9. Sandomirskij S. G. Magnitnyj kontrol’ fiziko-mehanicheskih svojstv izdelij massovogo proizvodstva v dvizhenii (obzor) [Magnetic testing of physical and mechanical properties of mass production in motion (review)]. Defektoskopija = Russian journal of nondestructive testing, 1996, no. 7, pp. 24–46.
10. Sandomirskij S. G. Raschet i analiz razmagnichivajushhego faktora ferromagnitnyh tel [The calculation and analysis of the demagnetization factor of ferromagnetic bodies]. Minsk, Belaruskaja navuka Publ., 2015, 244 p.
11. Sandomirskij S. G. Optimizacija rezhimov magnitnogo kontrolja struktury otlivok iz kovkogo chuguna [Optimization of modes of magnetic control structure castings made of ductile cast iron]. Zavodskaja laboratorija. Diagnostika materialov = Factory laboratory. Diagnosis materials, 2009, no. 8, pp. 39–43.
12. Sandomirskij S. G. Sposob magnitnogo kontrolja struktury materiala s razmagnichivajushhim faktorom bolee 0,04 [A method of controlling the magnetic structure of the material with the demagnetizing factor of more than 0.04]. Patent RB, no. 13520, 2010.
13. Sandomirskij S. G., Pisarenko L. Z., Lukashevich S. F. Kolichestvennyj analiz vzaimosvjazi mikrostruktury i magnitnyh svojstv izdelij tipa «nippel’ 1¼» iz kovkogo chuguna KCh 30–6 [Quantitative analysis of the relationship of microstructure and magnetic properties of the «nipple 1¼» of products from malleable cast iron CN 30–6]. Defektoskopija = Russian journal of nondestructive testing, 2002, no. 4, pp. 18–24.
14. Sandomirskij S. G., Vershinin V. A. Korrektirovka brakovochnyh predelov avtomaticheskoj linii razbrakovki po obrabatyvaemosti ne obtochennyh otlivok nippelej iz kovkogo chuguna KCh 30–6 pri izmenenii ih razmerov [Correction of the rejection limits of the automatic screening line on the machinability of non-machined castings of ductile iron nipples KCH30-6 when changing their sizes]. Lit’e i metallurgija = Foundry production, 2008, no. 1, pp. 116–120.
15. Sandomirskij S. G., Delendik M. N., Sandomirskaja E. G., Gorbash V. G. Osobennosti raspredelenija ostatochnoj indukcii v dvuhslojnom ferromagnitnom cilindre [Features of the residual induction in the two-layer ferromagnetic cylinder]. Defektoskopija = Russian journal of nondestructive testing, 1997, no. 10, pp. 34–41.
16. Sandomirskij S. G. Fizicheskie osnovy metodiki rascheta namagnichivanija dvuhslojnyh chugunnyh otlivok [Physical basis of calculation methods of double-layer magnetization of iron castings]. Materialy mezhdunarodnoi nauchno-tehnicheskaja konferencija
17. «Materialy, oborudovanie i resursosberegajushhie tehnologii» [«Materials, equipment and resource-saving technologies»]. Mogilev, BRU, 2016, pp. 275–276.
18. Sandomirskij S. G. Korrektirovka kriterija sortirovki malogabaritnyh otlivok iz kovkogo chuguna po rezul’tatu izmerenija ih ostatochnoj namagnichennosti [Correction of the criterion for sorting small-sized ductile iron castings according to the result of measuring their residual magnetization]. Litejnoe proizvodstvo i metallurgija 2018. Belarus’: trudy 26-j mezhdunarodnoj nauchno-tehnicheskoj konferencii. Minsk, BNTU, pp. 52–56.
19. Zacepin N. N. Analiticheskaja funkcija, opisyvajushhaja hod simmetrichnoj petli magnitnogo gisterezisa [Analytical function describing the course of a symmetric magnetic hysteresis loop]. Vesci AN BSSR, serija fiziko-tjehnichnyh navuk = Proceedings academy of sciences of BSSR, physical-technical series, 1973, no. 4, pp. 29–31.
20. Sandomirskij S. G., Kuzmenkov O. V. Rezul’taty analiticheskogo modelirovanija namagnichennosti v otlivke chugunnogo nippelja s otbelennym poverhnostnym sloem [The results of analytical modeling of the magnetization in the casting of iron nipples with bleached surface layer]. Materialy, oborudovanie i resursosberegajushhie tehnologii [Materials, equipment and resource-saving technologies]. Materialy Mezhdunarodnoj nauchno-tehnicheskoj konferencii. Mogilev, Belorussko-Rossijskij universitet, 2018, pp. 367–368.
21. Sandomirskij S. G., Sandomirskaya E. G. Jeksperimental’noe issledovanie vlijanija magnitnyh svojstv poverhnostnogo sloja na ostatochnuju namagnichennost’ dvuhslojnogo izdelija [Experimental study of the influence of the magnetic properties of the surface layer on the residual magnetization of a two-layer product]. Materialy, oborudovanie i resursosberegajushhie tehnologii [Materials, equipment and resource-saving technologies]. Materialy Mezhdunarodnoj nauchno-tehnicheskoj konferencii. Mogilev, Belorussko-Rossijskij universitet, 2018, pp. 369–370.
Review
For citations:
Sandomirski S.G. Sorting nipple castings from malleable cast iron from the result of measuring their residual magnetization. Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY). 2018;(4):55-64. (In Russ.) https://doi.org/10.21122/1683-6065-2018-4-55-64
Views:
539
Email this article 