METHOD FOR LASER HARDENING OF SURFACES OF PARTS OF TITANIUM AND ITS ALLOYS Russian patent published in 2002 - IPC

FIELD: processes for laser treatment of metals, possibly in machine engineering for hardening working surfaces of parts of titanium and its alloys. SUBSTANCE: method comprises steps of blackening surface and its subsequent treatment in air at percentage humidity no more than 20% by means of laser beam with cross mode TEMoo at superimposing adjacent tracks; setting time period of interaction of laser beam with treated surface in range 0.6 ≤t≤1.5s; setting motion rate of laser beam in range 0.2≤V≤1.5cm/s at irradiation power density 10³-10⁴ Wt/sq.cm. EFFECT: enhanced wear resistance, increased useful life period of part surfaces at cyclic stress loading due to increased depth of hardened layer. 2 cl, 1 tbl, 1 ex