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3 October 1997 Laser modification of high-strength steels
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Constructional steels of A441, 4340 and 15B28H AISI types were laser remelted and laser alloyed using VC or CrB. The applied laser remelting rised already the Rockwell hardness to 50 - 60 HRC when the laser alloying by means of VC or CrB to about 75 HRC. The maximum of hardness was usually located in the center of the laser alloyed tracks. A strong microstructure refinement was observed in all cases of modification. Rising of the austenite amount was stated in the examined steels subjected to the VC or CrB laser alloying. The VC and M3C phases were established by the VC laser alloying when the M3(C,B) and M2B phase were identified by application of CrB laser alloying for lower and higher concentrations of alloying additions, respectively. The residual stresses of tension type were stated in the center of the laser remelted tracks and the level of which was diminished by laser alloying.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dariusz Mierzwinski and Boguslaw Major "Laser modification of high-strength steels", Proc. SPIE 3187, Laser Technology V: Applications in Materials Sciences and Engineering, (3 October 1997);

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