S. Spruk
Institut za elektroniko
in vakuumsko tehniko
1111 Ljubljana, Teslova 30
B. Pracek, IEVT Ljubljana
A. Rodic, Institut za kovinske materiale in tehnologije
Ljubljana
Proucevali smo lasersko toplotno obdelavo orodnega jekla OCR 12
(WNo 1.2080; DIN X210Cr12) pri konstantni energiji, frekvenci in
pomiku laserskega zarka, spreminjali pa smo oddaljenost zariscne
tocke laserskega zarka od povrsine vzorca. V toplotno vplivani
coni in v osnovnem jeklu OCR 12 smo merili trdoto, opazovali
spremembo mikrostrukture z opticno mikroskopijo in s
spektroskopijo Augerjevih elektronov analizirali vsebnosti
legirnih elementov.
Kljucne besede: laser, toplotna obdelava, mikrotrdota,
mikrostruktura
The laser surface heat treatment of the tool steel OCR 12 (WNo
1.2080; DIN X210Cr12) at a constant energy, frequency and speed
of the laser beam, and at a changed laser focus distance from a
sample surface was investigated. In the heat treated zone and in
the base steel OCR 12 a hardness was measured and changes in
microstructure were observed by optical microscopy, the
concentration of alloy elements was measured by AES (Auger
Electron Spectroscopy).
Key words: laser, heat treatment, microhardness, microstructure