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Nowadaysthe use of new high strength alloys is growing, but these alloys are difficult to machine due to the high temperatures generated during cutting. A solution is the use of cutting fluids, but those have adverse environmental effects, health risks and high costs of purchase, storage and maintenance. An emerging alternative is the use of cryogenic fluids such as liquid nitrogen (LN 2 )...
A study of the laser surface hardening process of two austempered ductile iron grades, with different austempering treatments has been carried out. Hardening was performed with an infrared continuous wave Nd:YAG laser in cylindrical specimens. The microstructure of the laser hardened samples was investigated using an optical microscope, microhardness profiles were measured and surface and radial residual...
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