ISSN:
1662-9752
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
Investigations include alloying the X38CrMoV5-3 hot-work tool steel surfacelayer with the tungsten carbide, using the high power diode laser (HPDL). The tungstencarbide ceramic particles of the medium grain size according to FSSS = 50 Bm wereintroduced using the rotor conveyer to improve the properties of the surface layer. Thepowder feed rate was set at the steady level of 8.64g/min. Remelting and alloying werecarried out several times in the laser power range of 1.2 – 2.3 kW in the remelting/alloying,alloying/remelting sequences. The structural mechanism was determined of gradient layerdevelopment, effect was studied of alloying parameters, gas protection method, and powderfeed rate on its mechanical properties, and especially on its hardness, abrasive wearresistance, and roughness. Structure changes were revealed consisting, in particular, in itsrefining, and also hardness and microhardness changes in comparison to the non-remeltedsteel. Examination results obtained with the EDX microanalysis, surface and linear analysesof the chemical composition, as well as the X-ray qualitative phase analysis are presented
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.530-531.269.pdf
