Abstract
Hard turning process is widely used for finishing the hardened surfaces of machine parts exposed to high load. Such parts can be gears, bearings, or short shafts. As in each machining process, hard turning may change the properties of the surface layer. In this research work, we deal with material structure changes developing in the bore of gears made of a material of 20MnCr5. Microscope images show that the structure of the material is altered on the surface of the bores due to the turning process under different conditions. In certain cases, a certain layer that cannot be etched develops, called a white layer. Surface layer modification may take place using different technological data. In this paper, we will prove that proper selection of these technological data (cutting speed, depth of cut, feed rate) may eliminate the formation of a white layer or may decrease its thickness. The fine structure of this surface layer was investigated using the X-ray diffraction method, whilst the thickness of the layer was measured by a computer image analysis method. In this paper, the different conditions for the development of the white layer are described, its composition and some of its properties are determined, and the relationship between technological data and the thickness of the white layer is investigated.
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References
Akcan S, Shah S, Moylan SP, Chabra PN, Chandrasekar S, Farris TN (1999) Characteristics of white layers formed in steels by machining. ASME Med 10:789–795
Bana V (2006) Manufacturing of high precision bores. PhD dissertation, Technische Universität Delft, 169 p
Barbacki A, Kawalec M, Hamrol A (2003) Turning and grinding as a source of microstructural changes in the surface layer of hardened steel. J Mater Process Technol 133(1–2):21–25
Barry J, Byrne G (2002) TEM study on the surface white layer in two turned hardened steels. Mater Sci Eng A325(1):356–364
Bosheh SS, Mativenga PT (2006) White layer formation in hard turning of H13 tool steel at high cutting speeds using CBN tooling. Int J Mach Tools Manuf 46(2):225–233
Brandt D (1995) Randzonenbeeinflussung beim Hartdrehen. Doctoral dissertation, Institute for Production Engineering and Machine Tools, Universität Hannover, 135 p
Brinksmeier E, Brockhoff T (1999) White layers in machining steels. 2nd International Conference on High Speed Machining, PTW TV, Darmstadt, pp 7–13
Chou YK, Evans CJ (1999) White layers and thermal modelling of hard turned surfaces. Int J Mach Tools Manuf 39(12):1863–1881
Chou K, Hui S (2005) Thermal modeling for white layer predictions in finish hard turning. Int J Mach Tool Manuf 45(4–5):481–495
Denkena B, Tönshoff HK, Friemuth T, Müller C, Zenner H, Renner F, Koehler M (2002) Fatigue strength of hard turned components. Proceedings of the First International Conference on Manufacturing Engineering, Halkidiki, Greece, pp 185–194
Gillemot L (1997) Anyagszerkezettan és anyagvizsgálat [Material structure and testing]. Tankönyvkiadó, Budapest, p 429 (in Hungarian)
Granet I (1980) Modern materials science. Reston Publishing, Reston Virginia, 530 p
Guo YB, Warren AW, Hashimoto F (2010) The basic relationships between residual stress, white layer, and fatigue life of hard turned and ground surfaces in rolling contact. CIRP J Manuf Sci Technol 2(2):129–134
Tiele JD, Melkote SN, Peascoe RA, Watkins TR (2000) Effect of cutting-edge geometry and workpiece hardness on surface residual stresses in finish hard turning of AISI 52100 steel. J Manuf Sci Eng 122(4):642–649
Kascsenko GA (1951) Metallográfia alapjai [Metallography basics]. Tankönyvkiadó, Budapest, 490 pp (in Hungarian)
Klocke F, Brinksmeier E, Weinert K (2005) Capability profile of hard cutting and grinding process. Annals of the CIRP 54(1):22–45
Poulachon G, Albert A, Schluraff M, Jawahir IS (2005) An experimental investigation of work material microstructure effects on white layer formation in PCBN hard turning. Int J Mach Tools Manuf 45(2):211–218
Ramesh A, Melkote SN, Allard LF, Riester L, Watkins TR (2005) Analysis of white layers formed in hard turning of AISI 52100 steel. Mater Sci Eng, A 390(1–2):88–97
Rech J, Moison A (2002) Surface integrity in finish hard turning of case hardened steels application to gear cone brakes. Proceedings of the International Conference on Manufacturing Engineering (ICME) 3–4 October, Haikidiki, Greece, pp 195–203
Schmidt J (1999) Mechanische und thermische wirkungen beim drehen gehärteter stähle. Doctoral dissertation, Universität Hannover
Snoeys R, Maris M, Peters J (1978) Thermally induced damage in grinding. Annals of the CIRP 27(2):571–581
Tönshoff HK, Karpuschewki B, Borbe C (1997) Comparison of basic mechanisms in cutting and grinding of hardened steel. Prod Eng IV/2. doi:5
Tönshoff H, Wobker H, Brandt D (1995) Eigenspannungen und randzonenausbildungen beim hartdrehen. HTM Härterei-Technische Metteilungen 50(3):176–181
Winands N (1996) Hartdrehen aus der Umformwärme gehärteter Wälzlagerringe. Doctoral dissertation, RWTH Aachen Universität, 128 p
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Kundrák, J., Gácsi, Z., Gyáni, K. et al. X-ray diffraction investigation of white layer development in hard-turned surfaces. Int J Adv Manuf Technol 62, 457–469 (2012). https://doi.org/10.1007/s00170-011-3811-7
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DOI: https://doi.org/10.1007/s00170-011-3811-7