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Experimental studies on the microstructure and …
Experimental studies ON THE microstructure AND HARDNESS OF LASERTRANSFORMATION HARDENING OF LOW ALLOY STEELP urushothaman Dinesh Babu1, Gengusamynaidu Buvanashekaran2, Karupuudaiyar R. Balasubramanian11 Department of Mechanical Engineering, National Institute of Technology, Tiruchirappalli, TN, India2 Welding Research Institute, Bharat Heavy Electricals Limited, Tiruchirappalli, TN, IndiaE-mail: March 2012, Accepted November 2012No. 12-CSME-38, Accession 3358 ABSTRACTAn Experimental investigation with Nd:YAG laser system was carried out to study the effects of laserhardening process parameters on the microstructure and hardness during laser hardening of EN25 laser beam is allowed to scan on the surface of the work piece by varying the laser beam power(750 1250 W) and travel speed (500 1000 mm/min) of the work table.
1.INTRODUCTION Surface microstructure and composition play a crucial role in determining the surface dependent engi-neering properties (wear, corrosion and oxidation resistance) of a component.
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