INVESTIGATION OF MACHINABILITY OF WELDED JOINTED HARDOX STEEL IN WEDM

Yıl 2019, Cilt: 20 Sayı: 1, 92 - 103, 01.01.2019

Mehmet Altuğ

https://doi.org/10.18038/aubtda.439123

Öz

In this study machinibility of hardox steel plates (welded by plasma and Mag welding) was examined in WEDM. Two different ampere value and two different feed rate were determined for the two different welding types. Depending on these factors ,micro structures, micro hardnesses and resistivity/conductivity values (varying according to heat output) were obtained at the HAZ and WM zones. Then, each of the samples taken from both HAZ and WM zones were cut in the WEDM by using 2 levelled four different parameters. The purpose at this stage is to examine the cutting width (kerf) and surface roughness (Ra) values at the HAZ and WM zones with respect to varying micro structure, micro hardness and conductivity values. At the end of the study, the lowest kerf was obtained with the plasma welded samples whereas the lowest Ra values were obtained with the Mag welded samples . The samples at WM zone are in general are the ones welded by high conductivity sample Mag welding. Whereas in the HAZ zone the samples are the ones welded by high conductivity plasma welding.

Anahtar Kelimeler

Hardox steel, Plasma welding, MAG welding, WEDM, Kerf, Ra

Kaynakça

• [1] Tosun N, Cogun C, Tosun G. A study on kerf and materials removal rate in wire electrical discharge machining based on taguchi method. Journal of Materials Processing Technology 2004; 152: 316-322.
• [2] Gupta P, Khanna R, Gupta RD, Sharma N. Effect of process parameters on kerf width in WEDM for HSLA using response surface methodology, Journal of Engineering and Technology, 2012; 2:1-6.
• [3] Yan MT, Huang PH. Accuracy Improvement of WireEDM by Real-Time Wire Tension Control. Int. J. Mach. Tools Manuf. 2004; 44: 807-814.
• [4] Hsue AWJ, Su HC. Removal Analysis of WEDM Tapering Process and Its Application to Generation of Precise Conjugate Surface. Journal of Materials Processing Technology 2004; 149:117-123.
• [5] Aqueel S, Mufti NA, Rakwal D, Bamberg E. Material Removal Rate, Kerf, and Surface Roughness of Tungsten Carbide Machined with Wire Electrical Discharge Machining. Journal of Materials Engineering and Performance 2011; 20: 71-76.
• [6] Jangra K. Jain A, Grover S. Optimization of multiple-machining characteristics in wire electrical discharge machining of punching die using grey relational analysis. Journal of Scientific and Industrial Research 2010; 69: 606-612.
• [7] Rakwal D, Bamberg E. Slicing, Cleaning and Kerf Analysis of Germanium Wafers Machined by Wire Electrical Discharge Machining. Journal of materials processing technology 2009; 209: 3740-3751.
• [8] Mahapatra SS, Patnaik A. Optimization of wire electrical discharge machining (WEDM) process parameters using Taguchi method. International Journal of Advanced Manufacturing Technology 2007; 34: 911-925.
• [9] Hari S, Khanna R. Parametric optimization of Cryogenic treated D-3 for cutting rate in wire electrical discharge machining, J Eng. Technology 2011; 1: 59-64.
• [10] Kansal HK, Singh S, Kumar P. Parametric optimization of powder mixed electricaldischarge machining by response surface methodology. Journal of Materials ProcessingTechnology 2005; 169: 427-436.
• [11] Altug M, Erdem M, Ozay C, Bozkır O. Surface roughness of Ti6Al4V after heat treatment evaluated by artificial neural networks. Material Testing 2016; 58: 189-199.
• [12] Altug M, Erdem M, Ozay C. Experimental investigation of kerf of Ti6Al4V exposed to different heat treatment processes in WEDM and optimization of parameters using genetic algorithm. Int.J.Adv.Manuf.Technol. 2015; 78: 1573-1583.
• [13] Frydman S, Konat L, Kalskı G. Structure and hardness changes in welded joints of Hardox steels, Archives Civil and Mechanical Engineering 2008; VIII: 15-27.
• [14] Konovalov SV, et al. Formation Wear Resistant Coatings on Martensite Steel Hardox 450 by Welding Methods. Materials Science and Engineering 2016; 142: 2-5.
• [15] Gökmeşe H, Özdemir M, The Effect Of Heat Treatment On The Formability Behavior Of Hardox-500 Sheet Material. Gazi University J. Sci Part:C 2016; 4: 343-349.
• [16] Filip AC, et al. Experimental research on the machinability of Hardox steel by abrasive waterjet cutting. DOI: 10.1051/matecconf/20179403003 2017.
• [17] Chamarthia S, et al. Investigation Analysis of Plasma arc cutting Parameters on the Unevenness surface of Hardox-400 material. Procedia Engineering 2013; 64: 854-861.
• [18] Mindivan H. Effects of Combined Diffusion Treatments on the Wear Behaviour of Hardox 400 Steel. Procedia Engineering 2013; 68: 710-715.
• [19] Gondalia RV, Sharma AK. Parametric Investigation and Optimization of Co2 Laser Cutting process used for Cutting Hardox-400 materials. International Journal of Science and Engineering Applications 2013; 2: 123-129.
• [20] Prajapati BD, Patel RJ, Khatri BC. Parametric Investigation of CO2 Laser Cutting of Mild Steel and Hardox-400 Material. International Journal of Emerging Technology and Advanced Engineering 2013; 3: 204-208.
• [21] Majerik J, Barenyi I. Experimental Investigation Into Tool Wear Of Cemented Carbide Cutting Inserts When Machining Wear Resistant Steel Hardox 500. Engineering Review 2016; 36: 167-174.
• [22] Montgomery DC. Design and Analysis of Experiments, Wiley, New York, USA, 2001.