MONOCRYSTALLINE WELDING OF MATERIALS HARDENED IN ONE DIRECTION

摘要

FIELD: process engineering.SUBSTANCE: invention relates to laser surfacing of metal hardened in one direction. Powder is fed onto substrate surface (4) of structural element (1, 120, 130) made of hardened metal with dendrites (31) oriented in one direction (32). Beam scanning rate, laser power, beam diameter, powder stream focus and/or powder flow rate are set to ensure local orientation of temperature gradient (28) at crystallisation front (19) less than 45° towards substrate dendrite direction (32) for dendrite (31) in substrate (4).EFFECT: monocrystalline growth of dendrites, ruled out cracking.24 cl, 4 dwg