Optimization of process parameters of pulsed TIG welded maraging steel C300

International Conference on Advances in Materials and Manufacturing Applications 2016

Deepak, P.^1 ; Jualeash, M.J.^1 ; Jishnu, J.^1 ; Srinivasan, P.^1 ; Arivarasu, M.^1 ; Padmanaban, R.^1 ; Thirumalini, S.^1

Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Amrita University, Coimbatore, India^1

关键词: Maraging;    Operator efficiency;    Optimization of process parameters;    Processing parameters;    Pulsed TIG;    Pulsing frequencies;    Regression equation;    Response surface methodology;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/149/1/012007/pdf
DOI  :  10.1088/1757-899X/149/1/012007

来源: IOP

【 摘 要 】

Pulsed TIG welding technology provides excellent welding performance on thin sections which helps to increase productivity, enhance weld quality, minimize weld costs, and boost operator efficiency and this has drawn the attention of the welding society. Maraging C300 steel is extensively used in defence and aerospace industry and thus its welding becomes an area of paramount importance. In pulsed TIG welding, weld quality depends on the process parameters used. In this work, Pulsed TIG bead-on-plate welding is performed on a 5mm thick maraging C300 plate at different combinations of input parameters: peak current (IP), base current (Ib) and pulsing frequency (HZ) as per box behnken design with three-levels for each factor. Response surface methodology is utilized for establishing a mathematical model for predicting the weld bead depth. The effect of IP, Iband HZ on the weld bead depth is investigated using the developed model. The weld bead depth is found to be affected by all the three parameters. Surface and contour plots developed from regression equation are used to optimize the processing parameters for maximizing the weld bead depth. Optimum values of IP, Iband HZ are obtained as 259 A, 120 A and 8 Hz respectively. Using this optimum condition, maximum bead depth of the weld is predicted to be 4.325 mm.