Effect of post-welding cooling regime on mechanical and microstructure properties of 30MnB5 boron steel used in agricultural mechanisation

Abstract

30MnB5 steel is a type of steel that can be used in the agricultural mechanization industry, where hardness, strength, impact resistance, and wear resistance are required. The increasing importance of economic factors in today's industry requires the production of longer-lasting agricultural machines for agricultural mechanization. For this reason, it is important to use the steel in question in agricultural mechanization and to combine it with welding. In this study, 30MnB5 steels were combined with the MAG welding method and cooled in three different (air, water, and oil) cooling regimes. Non-destructive (visual inspection, liquid penetrant test), destructive (impact, bending, and hardness tests), and metallographic tests were performed to determine the change in the mechanical and macro/microstructure properties of the welded 30MnB5 steel depending on the cooling regime. As a result of the visual inspection and liquid penetrant test, no macro or micro defects were found in the weld seams. Changes in mechanical and microstructural properties were observed in welded samples depending on the cooling regime.

Keywords

• 30MnB5 steel
• MAG welding
• Cooling regime
• Microstructure
• Mechanical properties

Tarımsal mekanizasyonda kullanılan 30MnB5 bor çeliğinin kaynak sonrası soğutma rejiminin mekanik ve mikroyapı özelliklerine etkisi

Abstract

30MnB5 çeliği tarımsal mekanizasyon endüstrisinde sertlik, mukavemet, darbe ve aşınma direnci istenen uygulamalarda kullanılabilen bir çelik türüdür. Günümüz endüstrisinde ekonomik faktörlerin giderek önem kazanması tarımsal mekanizasyonda daha uzun ömürlü tarım makinelerinin üretilmesini gerektirmektedir. Bu nedenle tarımsal mekanizasyonda kullanılan söz konusu çeliğin kullanımı ve kaynaklı birleştirilmesi önem arz etmektedir. Bu çalışmada, 30MnB5 çelikleri MAG kaynak yöntemiyle birleştirilmiş ve üç farklı (havada, suda ve yağda) soğutma rejiminde soğutulmuştur. Soğutma rejimine bağlı olarak kaynaklı 30MnB5 çeliğinin mekanik ve makro/mikroyapı özelliklerindeki değişimi tespit etmek için tahribatsız (görsel muayene, sıvı penetrant testi), tahribatlı (darbe, eğme, sertlik testleri) ve metalografik testler yapılmıştır. Görsel muayene ve sıvı penetrant testi sonucunda kaynak dikişlerinde herhangi bir makro ve mikro hataya rastlanmamıştır. Kaynaklı numunelerde soğutma rejimine bağlı olarak mekanik ve mikroyapı özelliklerindeki değişimler gözlemlenmiştir.

Keywords

• 30MnB5 çeliği
• MAG kaynağı
• Soğutma rejimi
• Mikroyapı
• Mekanik özellikler

References

1. Çevik B, Şahin Ö, Gülenç B (2021) Flux cored arc welding on 30MnB5 steels used in agricultural mechanisation: microstructure evolutions and mechanical properties, Sadhana 46: 155. https://doi.org/10.1007/s12046-021-01681-6
2. Güleç U, Altuntaş E (2013) Farklı kültivatör uç demirlerinin malzeme özelliklerinin belirlenmesi, Journal of Agricultural Faculty of Gaziosmanpaşa University 2013(1): 13-24. https://doi.org/10.13002/jafag181
3. Çevik B, (2021) Manual metal arc welding of dissimilar 30MnB5 and S 235 low alloyed steels for agricultural applications, Materials Testing 63(11): 999-1006. https://doi.org/10.1515/mt-2021-0033
4. Şahin A, Altuntaş E, Güleç U (2018) Determination of the strength analysis of the cultivator duckfoot shares with finite element methods, Selcuk Journal of Agriculture and Food Sciences 32: 257-265. https://doi.org/10.15316/SJAFS.2018.92
5. Metinoğlu F, Çakmak B, Balcı Y, Ulusoy ME (2006) Toprak işleme alet ve makinelerinde iş organlarının aşınmasının yakıt, güç ve zaman gereksinimi üzerindeki etkileri, Tarım Makinaları Bilimi Dergisi 2(2): 173-179.
6. Yazıcı A, Zeybek MS, Güler H, Koç M, Pekıtka FG (2017) Effect of carbonitriding on corrosion resistance of steel 30MnB5 in two acidic environments, Metal Science and Heat Treatment 59: 190-193. https://doi.org/10.1007/s11041-017-0127-8
7. Güler H, Ertan R, Özcan R (2013) Characteristics of 30MnB5 boron steel at elevated temperatures, Materials Science and Engineering A 578: 417-421. https://doi.org/10.1016/j.msea.2013.04.116
8. Queirós GW, Bermejo J, Garcia Sanchez L, Gómez Salazar JM, Criado AJ (2018) Improvement of the mechanical properties of 30MnB5 wear-resistant steel by subcritical annealing and water quenching, improving its life cycle analysis, Journal of Material Science & Engineering 7: 495. https://doi.org/10.4172/2169-0022.1000495

9. Kayral S (2014. Investigation of mechanical properties and transition temperature of tempered 30MnB5 steel, Technological Applied Sciences 9: 43-50. https://doi.org/10.12739/NWSA.2014.9.4.2A0088
10. Yazıcı A (2011) Wear behavior of carbonitride-treated ploughshares produced from 30MnB5 steel for soil tillage applications, Metal Science and Heat Treatment 53(5-6): 248-253. https://doi.org/10.1007/s11041-011-9377-z
11. Güler Özgül H, Ertan R, Özcan R (2014) Effect of heat treatment on the microstructure and mechanical properties of 30MnB5 boron steel, Materials and Technology 48(6): 971-976.
12. Bozkurt F, Çakır FH, Er Ü (2021) Investigation of the tribological and mechanical properties of boron steels in terms of potential usage in agricultural applications, Politeknik Dergisi 24(2): 431-438. https://doi.org/10.2339/politeknik.706532
13. Mejía I, Bedolla-Jacuinde A, Maldonado C, Cabrera JM (2011) Hot ductility behaviour of a low carbon advancedhigh strength steel (AHSS) microalloyed with boron, Materials Science and Engineering A 528(13-14): 4468-4474. https://doi.org/10.1016/j.msea.2011.02.040
14. Kolhe K, Dharaskar RM (2009) Welding science the need of farmers for repair of farm tools, International Journal of Agricultural Engineering 2: 186-190.
15. Uchihara M (2011) Joining technologies for automotive steel sheets, Welding International 25: 249-259. https://doi.org/10.1080/09507111003655341
16. Şenol M, Çam G, (2023) Investigation into microstructures and properties of AISI 430 ferritic steel butt joints fabricated by GMAW, International Journal of Pressure Vessels and Piping 202: 104926. https://doi.org/10.1016/j.ijpvp.2023.104926
17. Serindağ HT, Çam G, (2023) Characterizations of microstructure and properties of dissimilar AISI 316L/9Ni low alloy cryogenic steel joints fabricated by GTAW, Journal of Materials Engineering and Performance 32: 7039-7049. https://doi.org/10.1007/s11665-022-07601-x
18. Serindağ HT, Çam G, (2022) Multi-pass butt welding of thick AISI 316L plates by gas tungsten arc welding: Microstructural and mechanical characterization, International Journal of Pressure Vessels and Piping 200: 104842. https://doi.org/10.1016/j.ijpvp.2022.104842
19. Ezer M, Çam G, (2022) A Study on microstructure and mechanical performance of gas metal arc welded AISI 304L joints, Materialwissenschaft und Werkstofftechnik 53(9): 1043-1052. https://doi.org/10.1002/mawe.202200050
20. Serindağ HT, Tardu C, Kirçiçek İÖ, Çam G, (2022) A study on microstructural and mechanical properties of gas tungsten arc welded thick cryogenic 9% Ni alloy steel butt joint, CIRP Journal of Manufacturing Science and Technology 37: 1-10. https://doi.org/10.1016/j.cirpj.2021.12.006
21. Serindağ HT, Çam G, (2021) Microstructure and mechanical properties of gas metal arc welded AISI 430/AISI 304 dissimilar stainless steels butt joints, Journal of Physics: Conference Series 1777: 012047 https://doi.org/10.1088/1742-6596/1777/1/012047
22. Serindağ HT, Çam G, (2022) Gaz tungsten ark kaynaklı 10 mm kalınlığındaki AISI 316L bağlantıların içyapı ve mekanik karakterizasyonu, Düzce Üniversitesi Bilim ve Teknoloji Dergisi 10(4): 1873-1889. https://doi.org/10.29130/dubited.1015580
23. Serindağ HT, Kırçiçek İÖ, Tardu C, Çam G, (2022) Gaz tungsten ark kaynaklı 9Ni kriyojenik çelik bağlantının içyapı ve mekanik özelliklerinin belirlenmesi, Mühendis ve Makine 63(706): 117-137. https://doi.org/10.46399/muhendismakina.1085742
24. Açar İ, Gülenç B (2021) Effect of shielding gas combination on microstructure and mechanical properties of MIG welded stainless steel 316, Materials Testing 63: 97-101. https://doi.org/10.1515/mt-2020-0014
25. Çevik B (2017) Investigation of mechanical and microstructure properties of S275 structural steel joined by using different flux cored wire, Journal of Polytechnic 20: 675-680. https://doi.org/10.2339/politeknik.339397
26. Çevik B (2018) Effect of welding processes on mechanical and microstructural properties of S275 structural steel joints, Materials Testing 60: 863-868. https://doi.org/10.3139/120.111225
27. Kaya Y, Kahraman N, Durgutlu A, Gülenç B (2010) Tozaltı ark kaynağı ile birleştirilen farklı kalınlıktaki Grade A gemi saclarının mekanik özelliklerinin araştırılması, e-Journal of New World Science Academy 5(2): 348-352.
28. Kılınçer S, Kahraman N (2009) MIG welding of AISI 409 and Ç1010 steel using an austenitic electrode and investigation of their mechanical properties, Journal of the Faculty of Engineering and Architecture of Gazi University 24: 23-31.
29. Oğuz B (1989) Ark Kaynağı, İstanbul: Oerlikon-Erdini Basım ve Yayınevi.
30. Açar İ, Çevik B, Gülenç B (2023) Weldability of dissimilar stainless steels by MIG welding with different gas combinations, Sadhana 48: 69. https://doi.org/10.1007/s12046-023-02129-9
31. Çevik B, Koç M, (2019) The effects of welding speed onthe microstructure and mechanical properties of marine-grade aluminium (AA5754) alloy joined using MIG welding, Kovove Materialy 57: 307–316. https://doi.org/10.4149/km_2019_5_307
32. Türkmen M, Katı N, Kejanlı H, Çalıgülü U (2020) Properties of P460-S355 submerged arc welds, Materials Testing 62: 104-108. https://doi.org/10.3139/120.111449
33. Kim S, Kang Y, Lee C (2013) Variation in micro-structures and mechanical properties in the coarse-grained heat-affected zone of low-alloy steel with boron content, Materials Science and Engineering A 559: 178-186. https://doi.org/10.1016/j.msea.2012.08.072
34. Morimoto T (2005) Developments in flux-cored wire for gas-shielded arc welding, Kobelco Technology Review 26: 49-54.
35. Yaakob KI, Ishak M, Idris SRA, Aiman HN, Quazi MM (2018) Characterization of heat-treated gas metal arc-welded boron steel sheets, The International Journal of Advanced Manufacturing Technology 94: 827–834. https://doi.org/10.1007/s00170-017-0903-z
36. Er Ü (2011) An investigation of the friction and wear behaviour of 15B35H boron steel under dry sliding conditions, Journal of Science and Technology of Dumlupınar University 25: 75-82.
37. Hardell J, Kassfeldt E, Prakash B (2008) Friction and wear behaviour of high strength boron steel at elevated temperatures of up to 800 °C, Wear 264: 788-799. https://doi.org/10.1016/j.wear.2006.12.077
38. Çevik B (2018) The effect of pure argon and mixed gases on microstructural and mechanical properties of S275 structural steel joined by flux-cored arc welding, Kovove Materialy 56: 81-87. https://doi.org/10.4149/km_2018_2_81
39. Başyiğit AB, Kurt A (2015) S32205 dubleks paslanmaz çeliğin TIG kaynağında soğuma hızının mikroyapısal özelliklere etkileri, Uluslararası Mühendislik Araştırma ve Geliştirme Dergisi 2: 28-36.
40. Khan AR, Yu S, Wang H, Jiang Y (2019) Effect of cooling rate on microstructure and mechanical properties in the CGHAZ of electroslag welded pearlitic rail steel, Metals 9(7): 742. https://doi.org/10.3390/met9070742
41. Wang M, Zhang F, Yang Z (2017) Effects of high-temperature deformation and cooling process on the microstructure and mechanical properties of an ultra-strength pearlite steel, Materials & Design 114: 102–110. https://doi.org/10.1016/j.matdes.2016.10.049
42. Küçükömeroğlu T, Aktarer SM, İpekoğlu G, Çam G, (2018) Mechanical properties of friction stir welded St 37 and St 44 steel joints, Materials Testing 60(12): 1163-1170 https://doi.org/10.3139/120.111266
43. Küçükömeroğlu T, Aktarer SM, İpekoğlu G, Çam G (2019) Investigation of mechanical and microstructural properties of friction stir welded dual phase (DP) steel, IOP Conf. Series: Materials Science and Engineering. 629: 012010. https://doi.org/10.1088/1757-899X/629/1/012010
44. Suh CH, Lee RG, Oh SK, Jung Y, Son J, Kim YS (2011) Effect of welding heat input on fatigue life of quenched boron steel and FB steel lap joint, Journal of Mechanical Science and Technology 25: 1727-1735. https://doi.org/10.1007/s12206-011-0424-x
45. Li F, Fu M, Lin J (2014) Effect of cooling path on phase transformation of boron steel 22MnB5, Procedia Engineering 81: 1707-1712. https://doi.org/10.1016/j.proeng.2014.10.217
46. Dagostini VDS, Moura AND, Luz TDS, Castro NA, Orlando MTD, Vieira EA (2021) Microstructural analysis and mechanical behavior of the HAZ in an API 5 L X70 steel welded by GMAW process, Welding in the World 65: 1051-1060. https://doi.org/10.1007/s40194-021-01102-6