Plasma Welding Services-KeepSake Engineering Consultancy Pvt. Ltd.

Plasma arc welding (PAW) is an arc welding process similar to gas tungsten arc welding (GTAW). The electric arc is formed between an electrode (which is usually but not always made of sintered tungsten) and the work piece. The key difference from GTAW is that in PAW, by positioning the electrode within the body of the torch, the plasma arc can be separated from the shielding gas envelope. The plasma is then forced through a fine-bore copper nozzle which constricts the arc and the plasma exits the orifice at high velocities (approaching the speed of sound) and a temperature approaching 28,000 °C (50,000 °F) or higher. Arc plasma is the temporary state of a gas. The gas gets ionized after the passage of electric current through it and it becomes a conductor of electricity. In an ionized state, atoms break into electrons(-) and ions(+) and the system contains a mixture of ions, electrons, and highly excited atoms. The degree of ionization may be between 1% and greater than 100% i.e.; double and triple degrees of ionization. Such states exist as more electrons are pulled from their orbits.

The energy of the plasma jet and thus the temperature is dependent upon the electrical power employed to create arc plasma. A typical value of temperature obtained in a plasma jet torch may be of the order of 50000 °F (28000 °C) against about 10000 °F (5500 °C) in an ordinary electric welding arc. Actually, all welding arcs are (partially ionized) plasmas, but the one in plasma arc welding is a constricted arc plasma.

Plasma arc welding is an arc welding process wherein coalescence is produced by the heat obtained from a constricted arc setup between a tungsten/alloy tungsten electrode and the water-cooled (constricting) nozzle (non-transferred arc) or between a tungsten/alloy tungsten electrode and the job (transferred arc). The process employs two inert gases, one forms the arc plasma and the second shields the arc plasma. Filler metal may or may not be added.

KECPL is an Ahmedabad based professionally run decade and half old co. specialized in the field of thermal spray coatings & carbide wear parts. Team is headed by a technocrat who has decades of stint with engineering icons L & T. To produce quality coatings we have an excellent thermal spraying facility and highly skilled and trained team of engineers to do the job successfully. During the period of time co. has renewed their facilities according to the technical advancement adopted in the industry. We are presently equipped with Six axis articulated arm robot to operate our Plasma transferred arc pulsed 350 amp power source, High velocity oxy-fuel systems, Arc spray systems and flame spray guns. We also have manipulators for down hand welding capability.

KeepSake Engineering Consultancy is a manufacturer, job shop and a specialised engineering firm. The one thing that its products and services have in common is that they reduce wear caused by abrasion, friction, heat and corrosion. The company specialises in applying Thermal Spray Coatings to solve problems related to wear. It has five categories of thermal spray systems, viz., Flame spray (Rod rokide, powder), HVOF (tungsten carbide), Arc Spray, Plasma Transferred Arc, Spray and Fuse. It applies ceramic, carbide, cobalt and Nickel alloy coatings.

We aim to employ this unique technology for life enhancement of wear prone parts belonging to various industries. To achieve that goal we have developed special kind of jigs and fixtures to maintain uniformity and accuracy of dimensions of coated parts. This efforts and care resulted in to a sound clientele of OEMs and big end users who are highly satisfied with the performance improvement they are getting by such coatings and wear parts.

We are well aware that we are in the maintenance field where emergency is very routine phenomena. That’s why at the customer level we have customer support engineers, who continuously work with customers to solve their wear and corrosion related problems.