Surface integrity of turned laser-welded hybrid shafts
- 67 Downloads
For applications like components of vehicle drives, e.g. drive shaft or motor shaft, the increasing amount of CO2 emission becomes a major challenge. Weight reduction of vehicle parts is one possibility to reduce CO2 emission. Therefore functionally adapted components must be designed in order to become smaller and lighter. Consequently monolithic material is not sufficient anymore, so there is a demand for tailored hybrid parts consisting of more than one material. Those tailored hybrid parts have to pass through a processing chain. There is the option of joining different materials in the hybrid part to meet the requirements. The discussed combination is a SAE1020-SAE5120 compound. Laser beam welding is an appropriate joining process due to its reduced heat influence, the resulting narrow welds and a low post-processing effort. Thus semi-finished products for the manufacturing of tailored hybrid shafts with graded properties can be produced efficiently. Further in the process chain there is the need for machining to reach an adequate level of accuracy of shape and dimension. Moreover the residual stress modification by the machining process has a deep impact on the lifespan of hybrid components. Therefore in this paper the machinability of the SAE1020-SAE5120 compound compared with a SAE1020-SAE1020 compound will be examined. The effect of cutting edge micro geometry on the surface and subsurface properties is analysed. Relationships between process forces, residual stresses and surface roughness are investigated. Metallographic cross sections and hardness measurements will show the connection between welded materials. The transition zone—the weld between the monomaterials—is the centre of attention for the investigations.
KeywordsSubsurface properties Residual stresses Surface integrity Hybrid shaft Laser welding Steel welding
The results presented in this paper were obtained from the Collaborative Research Centre 1153 “Process chain to produce hybrid high performance components with Tailored Forming” in subprojects A3 and B4. The authors thank the German Research Foundation (DFG) for the financial support of this project.
- 1.Seffer O, Lahdo R, Springer A, Kaierle S (2014) Laser-GMA hybrid welding of API 5L X70 with 23 mm plate thickness using 16 kW disk laser and two GMA welding power sources. J Laser Appl 26 4:042005-1–042005-9Google Scholar
- 4.Breidenstein Β (2011) Oberflächen und Randzonen hoch belasteter Bauteile. Habilitation, Leibniz Universität HannoverGoogle Scholar
- 10.Thiele JD (1998) An investigation of surface generation mechanism for finish hard turning of AISI 52100 steel. M. S. thesis, The George W. Woodruff School of mechanical engineering, Georgia Institute of Technlogy, Atlanta, GAGoogle Scholar
- 11.Woite M GmbH (2012) Werkstoff-Nr. 1.0460. http://woite-edelstahl.info/10460de.html. Accessed 25 May 2018
- 12.Deutsche Edelstahlwerke Services GmbH (2011) Cr-Mn-legierter Einsatzstahl 1.7147/1.7149 20MnCr5/20MnCrS5. https://www.dew-stahl.com/fileadmin/files/dewstahl.com/documents/Publikationen/Werkstoffdatenblaetter/Baustahl/1.7147_1.7149_de.pdf. Accessed 25 May 2018
- 13.Denkena B, Reichstein M, Brodehl J, de León Garcia L (2005) Surface Preparation, coating and wear performance of geometrically defined cutting edges. Proc 5th Int Conf “The Coatings” Manuf Eng Key Eng Mater 438:1–7Google Scholar
- 15.Breidenstein B, Denkena B, Prasanthan V (2016) Energy dispersive residual stress determination, 2. Internationale Konferenz: Euro hybrid –materials and structures, Kaiserslautern, 211–215Google Scholar
- 17.Klaus M (2009) Röntgendiffraktometrische Ermittlung tiefenabhängiger Eigenspannungsverteilungen in Dünnschichtsystemen mit komplexen Aufbau. Dissertation, Technische Universität BerlinGoogle Scholar