Analysis of the Heat Generated by Welding Process for Solid State two dissimilar metals.
- PDF / 721,847 Bytes
- 6 Pages / 612 x 792 pts (letter) Page_size
- 65 Downloads / 241 Views
Analysis of the Heat Generated by Welding Process for Solid State two dissimilar metals. Ezequiel R. Rodríguez Ramos1,2 . P. del C. Zambrano Robledo2, A. Juárez Hernández2, A. Reyes Valdéz1 1 Corporación Mexicana de Investigación en Materiales (COMIMSA), Ciencia y Tecnología #790 Fracc. Saltillo 400, C.P. 25290, Coahuila, México Tel: (844)4113200 ext.1217. 2
Doctorado en Ingeniería de Materiales, Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León, Ave. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, N.L., C.P. 66451 Abstract This article presents an analysis of the heat generated by welding two different metals by friction. The welded samples were a DP600 steel and aluminum 6063. To perform this analysis it study the heat conducted in this system using Fourier's Law and respective specific heat of each metal. We analyzed the integral equations that make up the model and the heat flow analysis to predict the optimal combination of alloys, in an ideal process. KEYWORDS: welding, microstructure, scanning electron microscopy (SEM)
Introduction. Currently the automotive industry joining techniques used in the chassis by means of fusion welding processes, however this type of process, presents problems associated with melting and solidification in welding materials, state technologies solid could be very convenient for use at the junction of dissimilar metals. The friction welding point and linear friction welding are used to join the alloys, but unfortunately its use limited to certain geometric configuration of the base materials [12]. The process of friction stir welding (FSW) was created in 1991 by TWI (welding Institute Technological) has been widely used to weld components that are difficult to be joined by conventional fusion welding such as aluminum, magnesium, copper and some alloys[2]. Friction stir welding is processes who involve thermodynamic and metallurgical, process where we expect find zones affected by heat and temperature; these are generated by the friction of the tool metals. This zones are; Zone Agitation (ZA), the Thermomechanical Affected Zone (HAZ) and the Heat Affected Zone (ZAC). It´s in the ZA where we realize thermodynamic analysis prediction, based on an ideal model, the type of phases that we will obtain as a result of the process [2]. The solution area reaches a maximum temperature e between the eutectic temperature and the temperature of the alloy solvus. the precipitates are dissolved during heating and during cooling can then precipitated in or on grain boundaries, or may remain supersaturated solid solution solute ,depending on the cooling rate produced[1]
Methodology. The law of conservation of energy as well as the kinematics equations is the basis for all calculations of the hand heat balance (bc) and help us find the different equilibrium phases of welding. This can be explained simply in a system, as follows: Energy in =Energy out + Energy stored. The information obtained is mainly the balance of the area giving a lot of material into
Data Loading...
