Abstract
The aim of the Plasma Transferred Arc (PTA) hardfacing process is improving a technical surface locally with a dedicated material; Hardfacing became an issue of intense development related to wear resistant application. The hardfacing procedures can be differentiated by the intensity of mixture with the base body, which is usually increasing along with an increasing fusion efficiency rate. Nearly all kinds of weldable materials can be hardfaced and mostly all types of known wear resistant metals in combination can be used as hardfacing materials. The PTA hardfacing process has been widely employed due to several advantages such as higher volume of metal deposition rates and achieving very low dilution level. Heat input which influences dilution can be controlled by proper selection of PTA process parameters. In this study, an attempt has been made to analyze PTA hardfacing of IS: 2062 structural steel with Titanium Carbide (TiC). Experiments were conducted based on a fully replicable five-factor, five-level central composite rotatable design. Mathematical models were developed using response surface methodology to study the effects of PTA hardfacing process parameters such as welding current, welding speed ,powder feed rate, oscillation width and pre heat temperature on bead geometry parameters like penetration, reinforcement, bead width and dilution. Direct and interaction effects of PTA process parameters on bead geometry were analyzed. From mathematical model, the process parameters were optimized.
Highlights
Wear related failure of mechanical components is considerable as one of the major reasons for inefficiency of a variety of engineering applications
A significant advantage of Plasma Transferred Arc (PTA) surfacing over traditional surface welding processes arises from the fact that the consumable material used is in the powder form
Using the results of the experiments to correlate welding process parameters to bead geometry and dilution, mathematical models can be developed for the corresponding welding process (Davis, 1983; Harris and Smith, 1983)
Summary
Wear related failure of mechanical components is considerable as one of the major reasons for inefficiency of a variety of engineering applications. Using the results of the experiments to correlate welding process parameters to bead geometry and dilution, mathematical models can be developed for the corresponding welding process (Davis, 1983; Harris and Smith, 1983).
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