Gazi Üniversitesi Fen Bilimleri Dergisi (Jun 2017)
Optimization of Process Parameters for Friction Welding of SAE 1021/ Dillidur 400 / Dillimax 500 Steels Using Taguchi Technique
Abstract
The aim of this study is to optimize the welding parameters on the mechanical properties of SAE 1021 carbon steels and Dilldur 400 (high wear resistance) and Dillimax 500 (high strength) steels joined with friction welding with Taguchi analysis method. Taguchi analysis is used as a statistical experimental design to optimize material types joined with welding parameters such as pressure of upsetting and friction rotational speed. For this purpose, the steels were joined at 1250, 1500 and 1750 rpm and at ups etting pressures of 4, 6 and 8 MPa. Tensile tests and microhardness measurements were applied to determine the mechanical properties of the joint. According to the results of analyse, it was determined that Dillidur 400-Dillimax 500 could be selected as material pair. In addition, the friction speed and upsetting pressures can be selected 1500 rpm and 6 MPa respectively. Also, according to the experimental results, maximum tensile strength was obtained at the pair of Dillidur 400- Dillimax 500 with 651 MPa. In the same material pair, the welding interface hardness value was 353 HV.
