Abstract
This work was carried out in order to optimize the friction phase parameters, of friction welding of M2 high speed steel, to AISI 1040 medium carbon steel, namely; rotational speed, friction pressure and friction time. The experiments were designed as per Taguchi method. The optimization of the experimentally obtained results was carried out by trying three mathematical models, namely; a multiple linear regression model without interaction effect, a multiple linear regression model with interactions effect, and a second-order polynomial regression model. The three models were evaluated using the experimental data, the coefficient of multiple determination R<sup>2</sup>, and Standard error of the regression (S), were used as the evaluation criteria of the models. The polynomial model was chosen, and optimized using a Genetic Algorithm. The optimal value of the joint strength of 411 MPa was obtained at the highest value of the time ( 44.9 sec.) and the pressure of 112 MPa and the speed of 1349 r.p.m.
Highlights
High-speed steel HSS is one of the main tool materials
In order to save expensive steel, the cutting tool is produced as bimetallic: the working part is produced from the HSS steel, the tail part is produced from amedium carbon steel
The study revealed that, a satisfactory joint efficiency was obtained by welding of high speed steel to carbon steel, the joint efficiency came to be about 47%.This work is aimed at developing a mathematical model for results obtained experimentally, optimizing this model in order to find the optimum friction phase parameters that maximize the tensile strength
Summary
High-speed steel HSS is one of the main tool materials. In order to save expensive steel, the cutting tool is produced as bimetallic: the working part is produced from the HSS steel, the tail part is produced from amedium carbon steel. The joints between the working and tail parts are produced by friction welding which is the most productive and economically efficient process. This method of joining components is associated with a number of difficulties reducing the strength of the welded joint. The study revealed that, a satisfactory joint efficiency was obtained by welding of high speed steel to carbon steel, the joint efficiency came to be about 47%.This work is aimed at developing a mathematical model for results obtained experimentally, optimizing this model in order to find the optimum friction phase parameters that maximize the tensile strength
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